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Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
I agree, but shifting into N would have a similar effect of letting off the
gas. Engine vacuum is irrelevent in a vehicle with an electronically controlled transmission and no front axle disconnect; the effect of letting up off the gas or shifting into N is the relief of torque load on the transfer case, which will help the 4H gearset disengage. I forgot to mention my '02 Superduty does the same thing, too... "Jerry Bransford" <jerrypb@cox.net> wrote in message news:fFDwf.8827$V.3814@fed1read04... > Matt, my Cherokee was an automatic and the most I ever had to do to hasten > the shift back into 2wd was to let off on the gas. That raised the level > of engine vacuum which helped speed up the shift back into 2wd. If things > are operating correctly, there is never a need to shift into neutral to > get it to complete the shift back into 2wd. The transfer case is a > shift-on-the-fly, not "shift-into-neutral-then-shift-into-2wd.' :) > > Jerry > > Matt Macchiarolo wrote: >> Sometimes shifting out of 4H with an automatic, it might take a few >> seconds for the 'case to disengage because of the more constant torque >> load of the automatic; shifting the tranny into "N" will help reduce this >> time. This was the case with our '93 GC, '94 XJ and my wife's current >> TJL. That said, 15 minutes as the OP wrote is definitely too long for the >> 'case to disengage. >> >> "Jerry Bransford" <jerrypb@cox.net> wrote in message >> news:Zexwf.8811$V.392@fed1read04... >> >>>Earl, it absolutely should not be necessary to shift into neutral to get >>>it back into 2Hi whether the transmission is an automatic or manual. New >>>Venture designed the transfer case to be a shift on the fly and it's been >>>that way for many years. >>> >>>I've had several Jeeps with that same transfer case with an automatic in >>>my Cherokee and a 5-speed in my TJ and both are true shift on the fly. If >>>yours wouldn't shift out until you shifted into neutral, something was >>>wrong somewhere. It won't always shift back into 2Hi right away but >>>backing off on the gas a bit to take the load off speeds up the process. >>> >>>Earle Horton wrote: >>> >>>>Jerry, >>>> >>>>If it is an automatic, then it probably is necessary. Although >>>>"theoretically" or according to the owner's manual one should be able to >>>>shift between 4H and 2H almost any time, if the drive line is loaded it >>>>isn't going to happen. I found this out when my wife had a '97 Cherokee >>>>with automatic. For some reason, she tried to shift the transfer case >>>>in >>>>the middle of a snow bound parking lot at the ski area. Once she got it >>>>in >>>>neutral, it refused to come out, until we had put the transmission in >>>>park. >>>>After all the grinding that I heard, while I was in the condo putting on >>>>my >>>>boots, we traded the vehicle in. I never did find out whether this was >>>>considered normal behavior or not. >>>> >>>>With my Wrangler, which is manual transmission, I step on the clutch, >>>>just >>>>out of force of habit, before shifting anything. >>>> >>>>Earle >>>> >>>>"Jerry Bransford" <jerrypb@cox.net> wrote in message >>>>news:jNwwf.8809$V.5954@fed1read04... >>>> >>>> >>>>>I hope you're not suggesting that that is necessary. :) >>>>> >>>>>Jim Smith wrote: >>>>> >>>>> >>>>>>Just a quick question. Are you stopping the Jeep and putting the >>>>>>transmission in neutral before shifting from 4H to 2H? >>>>>> >>>>>>Jim Smith >>>>>> >>>>>> >>>>>><phillip_putzback@insightbb.com> wrote in message >>>>>>news:1136815927.249344.47240@g49g2000cwa.goo glegroups.com... >>>>>> >>>>>> >>>>>> >>>>>>>I have the 4 low - 2 high and 4 high options for the transfer case. >>>>>>>My >>>>>>>neighborhood isn't plowed normally so soem morning I have to start >>>>>>>out >>>>>>>in 4 high until I hit the main street. Then it might take 10-15 >>>>>>>minutes >>>>>>>to diesngage and lately when it finally disengages there is a massive >>>>>>>pop when it disengages. I have tried going into reverse a few feet >>>>>>>and >>>>>>>then driving off but that doesn't seem to work. >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>-- >>>>>Jerry Bransford >>>>>PP-ASEL N6TAY >>>>>See the Geezer Jeep at >>>>>http://members.cox.net/jerrypb/ >>>> >>>> >>>> >>>-- >>>Jerry Bransford >>>PP-ASEL N6TAY >>>See the Geezer Jeep at >>>http://members.cox.net/jerrypb/ >> >> >> > > -- > Jerry Bransford > PP-ASEL N6TAY > See the Geezer Jeep at > http://members.cox.net/jerrypb/ |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
I agree, but shifting into N would have a similar effect of letting off the
gas. Engine vacuum is irrelevent in a vehicle with an electronically controlled transmission and no front axle disconnect; the effect of letting up off the gas or shifting into N is the relief of torque load on the transfer case, which will help the 4H gearset disengage. I forgot to mention my '02 Superduty does the same thing, too... "Jerry Bransford" <jerrypb@cox.net> wrote in message news:fFDwf.8827$V.3814@fed1read04... > Matt, my Cherokee was an automatic and the most I ever had to do to hasten > the shift back into 2wd was to let off on the gas. That raised the level > of engine vacuum which helped speed up the shift back into 2wd. If things > are operating correctly, there is never a need to shift into neutral to > get it to complete the shift back into 2wd. The transfer case is a > shift-on-the-fly, not "shift-into-neutral-then-shift-into-2wd.' :) > > Jerry > > Matt Macchiarolo wrote: >> Sometimes shifting out of 4H with an automatic, it might take a few >> seconds for the 'case to disengage because of the more constant torque >> load of the automatic; shifting the tranny into "N" will help reduce this >> time. This was the case with our '93 GC, '94 XJ and my wife's current >> TJL. That said, 15 minutes as the OP wrote is definitely too long for the >> 'case to disengage. >> >> "Jerry Bransford" <jerrypb@cox.net> wrote in message >> news:Zexwf.8811$V.392@fed1read04... >> >>>Earl, it absolutely should not be necessary to shift into neutral to get >>>it back into 2Hi whether the transmission is an automatic or manual. New >>>Venture designed the transfer case to be a shift on the fly and it's been >>>that way for many years. >>> >>>I've had several Jeeps with that same transfer case with an automatic in >>>my Cherokee and a 5-speed in my TJ and both are true shift on the fly. If >>>yours wouldn't shift out until you shifted into neutral, something was >>>wrong somewhere. It won't always shift back into 2Hi right away but >>>backing off on the gas a bit to take the load off speeds up the process. >>> >>>Earle Horton wrote: >>> >>>>Jerry, >>>> >>>>If it is an automatic, then it probably is necessary. Although >>>>"theoretically" or according to the owner's manual one should be able to >>>>shift between 4H and 2H almost any time, if the drive line is loaded it >>>>isn't going to happen. I found this out when my wife had a '97 Cherokee >>>>with automatic. For some reason, she tried to shift the transfer case >>>>in >>>>the middle of a snow bound parking lot at the ski area. Once she got it >>>>in >>>>neutral, it refused to come out, until we had put the transmission in >>>>park. >>>>After all the grinding that I heard, while I was in the condo putting on >>>>my >>>>boots, we traded the vehicle in. I never did find out whether this was >>>>considered normal behavior or not. >>>> >>>>With my Wrangler, which is manual transmission, I step on the clutch, >>>>just >>>>out of force of habit, before shifting anything. >>>> >>>>Earle >>>> >>>>"Jerry Bransford" <jerrypb@cox.net> wrote in message >>>>news:jNwwf.8809$V.5954@fed1read04... >>>> >>>> >>>>>I hope you're not suggesting that that is necessary. :) >>>>> >>>>>Jim Smith wrote: >>>>> >>>>> >>>>>>Just a quick question. Are you stopping the Jeep and putting the >>>>>>transmission in neutral before shifting from 4H to 2H? >>>>>> >>>>>>Jim Smith >>>>>> >>>>>> >>>>>><phillip_putzback@insightbb.com> wrote in message >>>>>>news:1136815927.249344.47240@g49g2000cwa.goo glegroups.com... >>>>>> >>>>>> >>>>>> >>>>>>>I have the 4 low - 2 high and 4 high options for the transfer case. >>>>>>>My >>>>>>>neighborhood isn't plowed normally so soem morning I have to start >>>>>>>out >>>>>>>in 4 high until I hit the main street. Then it might take 10-15 >>>>>>>minutes >>>>>>>to diesngage and lately when it finally disengages there is a massive >>>>>>>pop when it disengages. I have tried going into reverse a few feet >>>>>>>and >>>>>>>then driving off but that doesn't seem to work. >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>-- >>>>>Jerry Bransford >>>>>PP-ASEL N6TAY >>>>>See the Geezer Jeep at >>>>>http://members.cox.net/jerrypb/ >>>> >>>> >>>> >>>-- >>>Jerry Bransford >>>PP-ASEL N6TAY >>>See the Geezer Jeep at >>>http://members.cox.net/jerrypb/ >> >> >> > > -- > Jerry Bransford > PP-ASEL N6TAY > See the Geezer Jeep at > http://members.cox.net/jerrypb/ |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
I agree, but shifting into N would have a similar effect of letting off the
gas. Engine vacuum is irrelevent in a vehicle with an electronically controlled transmission and no front axle disconnect; the effect of letting up off the gas or shifting into N is the relief of torque load on the transfer case, which will help the 4H gearset disengage. I forgot to mention my '02 Superduty does the same thing, too... "Jerry Bransford" <jerrypb@cox.net> wrote in message news:fFDwf.8827$V.3814@fed1read04... > Matt, my Cherokee was an automatic and the most I ever had to do to hasten > the shift back into 2wd was to let off on the gas. That raised the level > of engine vacuum which helped speed up the shift back into 2wd. If things > are operating correctly, there is never a need to shift into neutral to > get it to complete the shift back into 2wd. The transfer case is a > shift-on-the-fly, not "shift-into-neutral-then-shift-into-2wd.' :) > > Jerry > > Matt Macchiarolo wrote: >> Sometimes shifting out of 4H with an automatic, it might take a few >> seconds for the 'case to disengage because of the more constant torque >> load of the automatic; shifting the tranny into "N" will help reduce this >> time. This was the case with our '93 GC, '94 XJ and my wife's current >> TJL. That said, 15 minutes as the OP wrote is definitely too long for the >> 'case to disengage. >> >> "Jerry Bransford" <jerrypb@cox.net> wrote in message >> news:Zexwf.8811$V.392@fed1read04... >> >>>Earl, it absolutely should not be necessary to shift into neutral to get >>>it back into 2Hi whether the transmission is an automatic or manual. New >>>Venture designed the transfer case to be a shift on the fly and it's been >>>that way for many years. >>> >>>I've had several Jeeps with that same transfer case with an automatic in >>>my Cherokee and a 5-speed in my TJ and both are true shift on the fly. If >>>yours wouldn't shift out until you shifted into neutral, something was >>>wrong somewhere. It won't always shift back into 2Hi right away but >>>backing off on the gas a bit to take the load off speeds up the process. >>> >>>Earle Horton wrote: >>> >>>>Jerry, >>>> >>>>If it is an automatic, then it probably is necessary. Although >>>>"theoretically" or according to the owner's manual one should be able to >>>>shift between 4H and 2H almost any time, if the drive line is loaded it >>>>isn't going to happen. I found this out when my wife had a '97 Cherokee >>>>with automatic. For some reason, she tried to shift the transfer case >>>>in >>>>the middle of a snow bound parking lot at the ski area. Once she got it >>>>in >>>>neutral, it refused to come out, until we had put the transmission in >>>>park. >>>>After all the grinding that I heard, while I was in the condo putting on >>>>my >>>>boots, we traded the vehicle in. I never did find out whether this was >>>>considered normal behavior or not. >>>> >>>>With my Wrangler, which is manual transmission, I step on the clutch, >>>>just >>>>out of force of habit, before shifting anything. >>>> >>>>Earle >>>> >>>>"Jerry Bransford" <jerrypb@cox.net> wrote in message >>>>news:jNwwf.8809$V.5954@fed1read04... >>>> >>>> >>>>>I hope you're not suggesting that that is necessary. :) >>>>> >>>>>Jim Smith wrote: >>>>> >>>>> >>>>>>Just a quick question. Are you stopping the Jeep and putting the >>>>>>transmission in neutral before shifting from 4H to 2H? >>>>>> >>>>>>Jim Smith >>>>>> >>>>>> >>>>>><phillip_putzback@insightbb.com> wrote in message >>>>>>news:1136815927.249344.47240@g49g2000cwa.goo glegroups.com... >>>>>> >>>>>> >>>>>> >>>>>>>I have the 4 low - 2 high and 4 high options for the transfer case. >>>>>>>My >>>>>>>neighborhood isn't plowed normally so soem morning I have to start >>>>>>>out >>>>>>>in 4 high until I hit the main street. Then it might take 10-15 >>>>>>>minutes >>>>>>>to diesngage and lately when it finally disengages there is a massive >>>>>>>pop when it disengages. I have tried going into reverse a few feet >>>>>>>and >>>>>>>then driving off but that doesn't seem to work. >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>-- >>>>>Jerry Bransford >>>>>PP-ASEL N6TAY >>>>>See the Geezer Jeep at >>>>>http://members.cox.net/jerrypb/ >>>> >>>> >>>> >>>-- >>>Jerry Bransford >>>PP-ASEL N6TAY >>>See the Geezer Jeep at >>>http://members.cox.net/jerrypb/ >> >> >> > > -- > Jerry Bransford > PP-ASEL N6TAY > See the Geezer Jeep at > http://members.cox.net/jerrypb/ |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
The '97 Cherokee does not have the front axle disconnect. They did away with
that in '92 or 93 in the Cherokee. It remained in the YJ Wrangler until 1995. "Walt & Lynda Johnson" <waterbirds@usadatanet.net> wrote in message news:3qKdnX5qVfl5gl7eRVn-qA@usadatanet.net... > I've had exactly the same problem with my 1986 Cherokee. What is > happening is that the vacuum motor on the axle isn't disengaging > the axles from the differential. Simply replace the vacuum motor > with a new one and the problem will go away. > > On the Cherokee, instead of freewheeling hubs, the right hand side > axle is split with two splined sections. Normal 2WD operation the > spline joiner is slid on to one axle section. The spider gears > in the differential rotate in opposite directions and the > differential center section is stationary. When placed in 4WD, the > spline joiner slides to connect the two splined axle sections thereby > locking up the axle. There are three hoses, one to engage the > axle via the vacuum motor, the second to disengage the axle via the > vacuum motor, and the third to send the "I'm locked up" message > to the light on the dashboard. > > Walt Johnson. > > <phillip_putzback@insightbb.com> wrote in message > news:1136815927.249344.47240@g49g2000cwa.googlegro ups.com... >> I have the 4 low - 2 high and 4 high options for the transfer case. My >> neighborhood isn't plowed normally so soem morning I have to start out >> in 4 high until I hit the main street. Then it might take 10-15 minutes >> to diesngage and lately when it finally disengages there is a massive >> pop when it disengages. I have tried going into reverse a few feet and >> then driving off but that doesn't seem to work. >> > > |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
The '97 Cherokee does not have the front axle disconnect. They did away with
that in '92 or 93 in the Cherokee. It remained in the YJ Wrangler until 1995. "Walt & Lynda Johnson" <waterbirds@usadatanet.net> wrote in message news:3qKdnX5qVfl5gl7eRVn-qA@usadatanet.net... > I've had exactly the same problem with my 1986 Cherokee. What is > happening is that the vacuum motor on the axle isn't disengaging > the axles from the differential. Simply replace the vacuum motor > with a new one and the problem will go away. > > On the Cherokee, instead of freewheeling hubs, the right hand side > axle is split with two splined sections. Normal 2WD operation the > spline joiner is slid on to one axle section. The spider gears > in the differential rotate in opposite directions and the > differential center section is stationary. When placed in 4WD, the > spline joiner slides to connect the two splined axle sections thereby > locking up the axle. There are three hoses, one to engage the > axle via the vacuum motor, the second to disengage the axle via the > vacuum motor, and the third to send the "I'm locked up" message > to the light on the dashboard. > > Walt Johnson. > > <phillip_putzback@insightbb.com> wrote in message > news:1136815927.249344.47240@g49g2000cwa.googlegro ups.com... >> I have the 4 low - 2 high and 4 high options for the transfer case. My >> neighborhood isn't plowed normally so soem morning I have to start out >> in 4 high until I hit the main street. Then it might take 10-15 minutes >> to diesngage and lately when it finally disengages there is a massive >> pop when it disengages. I have tried going into reverse a few feet and >> then driving off but that doesn't seem to work. >> > > |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
The '97 Cherokee does not have the front axle disconnect. They did away with
that in '92 or 93 in the Cherokee. It remained in the YJ Wrangler until 1995. "Walt & Lynda Johnson" <waterbirds@usadatanet.net> wrote in message news:3qKdnX5qVfl5gl7eRVn-qA@usadatanet.net... > I've had exactly the same problem with my 1986 Cherokee. What is > happening is that the vacuum motor on the axle isn't disengaging > the axles from the differential. Simply replace the vacuum motor > with a new one and the problem will go away. > > On the Cherokee, instead of freewheeling hubs, the right hand side > axle is split with two splined sections. Normal 2WD operation the > spline joiner is slid on to one axle section. The spider gears > in the differential rotate in opposite directions and the > differential center section is stationary. When placed in 4WD, the > spline joiner slides to connect the two splined axle sections thereby > locking up the axle. There are three hoses, one to engage the > axle via the vacuum motor, the second to disengage the axle via the > vacuum motor, and the third to send the "I'm locked up" message > to the light on the dashboard. > > Walt Johnson. > > <phillip_putzback@insightbb.com> wrote in message > news:1136815927.249344.47240@g49g2000cwa.googlegro ups.com... >> I have the 4 low - 2 high and 4 high options for the transfer case. My >> neighborhood isn't plowed normally so soem morning I have to start out >> in 4 high until I hit the main street. Then it might take 10-15 minutes >> to diesngage and lately when it finally disengages there is a massive >> pop when it disengages. I have tried going into reverse a few feet and >> then driving off but that doesn't seem to work. >> > > |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
The way I remember it, this one wouldn't shift into 4-HI even with the
transmission in neutral, not until after we had killed the engine. Now either there is something lacking with my understanding of an automatic transmission in neutral, or there was something wrong with this one. Even with a synchro, I don't think that you are going to shift between 4-HI and 2-HI, if there is appreciable torque on the transfer case. Note that our Cherokee and the original poster's '97 didn't have front axle disconnects. Thanks to Matt for pointing that out. Earle "Will Honea" <whonea@yahoo.com> wrote in message news:JxX2tWiP5BNp-pn2-Fmwd2rxOq2Cg@anon.none.net... > 4LO to 4HI is a whole different ball game, Earle. That's one where > neutral and barely rolling (4HI to 4LO) or neutral and stopped (4LO to > 4HI) is pretty much necessary. There is nothing even close to a > syncro on the dog ring that locks/unlocks the planetary gears to > select low range - that damned thing will grind even if you are > parked, I swear. 4HI to 2HI and back has a synchro that helps out > some and if you have the newer model front axle that runs locked all > the chain drive gears are always spinng at very near the same speed as > the input drive anyway. Plus, there is a neutral between 4HI and 4LO > where there is no disengaed point in the 4HI to 2HI shift to allow a > speed mismatch. > > On Tue, 10 Jan 2006 01:56:40 UTC "Earle Horton" > <NurseBustersNoSpam@msn.com> wrote: > > > In the condo, second floor of the building. I was sitting down to a well > > deserved beer and a viewing of "Sabrina the Teen Age Witch", when I heard a > > "Holy Sh*t!" noise from the parking lot, and instantly hoped it wasn't mine. > > That hope was dashed pretty quick. As far as I could figure out, she had > > shifted onto 4-LO on entry to the slush filled parking lot. On the way out, > > she thought that 4-HI would be better. She was probably right, but once she > > got the transfer case into Neutral it wouldn't come out for anything, not > > until I came out and played with the automatic shifter, shut off the engine, > > and fiddled around with it for a few minutes. > > > > I hate to say that Jerry's advice is "just plain 'wrong' and ill-advised", > > but there you have it. > > > > Earle > > > > "Jo Bo" <jromas SPAM@columbus.rr.com> wrote in message > > news:p%Dwf.15070$%D1.8489@tornado.ohiordc.rr.com.. . > > > Jerry, > > > > > > Very sorry to disagree but I've had 2 automatic XJ's a 96 and a 99 and > > they > > > both need to be put in "N" on the transmission, not the transfer case, to > > > shift in or out of 4wd if your doing anything less then say 10 MPH there's > > > too much tension on it to shift. Also when standing still it's even worse > > if > > > the transmission is put into gear while the transfer case is in neutral. > > > That's the grinding the guy in the lodge heard his wife doing. Now a > > > standard shift is another matter, ease up on the gas and shift. Also the > > > vacuum disconnect is a totally different situation altogether. I also > > owned > > > a 89 5 speed. > > > > > > JoBo > > > > > > "Jerry Bransford" <jerrypb@cox.net> wrote in message > > > news:rCDwf.8826$V.7042@fed1read04... > > > > Jim, your '88 and my '89 Cherokee had the exact same transfer case and > > as > > > > the owners manual instructs, I NEVER had to do anything unusual like you > > > > suggest to get it to shift back into 2Hi beyond moving the t-case lever > > > > back to 2wd. Your advice saying he should shift into neutral before > > > > shifting back into 2wd is just plain 'wrong' and ill-advised. It is > > > > absolutely not necessary, the most that is ever needed to help > > accelerate > > > > the shift back into 2wd is to simply let off on the gas a bit. > > > > > > > > Jim Smith wrote: > > > >> Well, I've got a 1988 Cherokee that you have to do this. You can shift > > > >> on the fly, but it may take some time for it to shift. I found > > stopping > > > >> and putting the jeep into neutral makes it much quicker and without nay > > > >> noise or pop or bang. Just my observation. > > > >> > > > >> > > > >> Jim Smith > > > >> > > > >> "Jerry Bransford" <jerrypb@cox.net> wrote in message > > > >> news:jNwwf.8809$V.5954@fed1read04... > > > >> > > > >>>I hope you're not suggesting that that is necessary. :) > > > >>> > > > >>>Jim Smith wrote: > > > >>> > > > >>>>Just a quick question. Are you stopping the Jeep and putting the > > > >>>>transmission in neutral before shifting from 4H to 2H? > > > >>>> > > > >>>>Jim Smith > > > >>>> > > > >>>> > > > >>>><phillip_putzback@insightbb.com> wrote in message > > > >>>>news:1136815927.249344.47240@g49g2000cwa.googl egroups.com... > > > >>>> > > > >>>> > > > >>>>>I have the 4 low - 2 high and 4 high options for the transfer case. > > My > > > >>>>>neighborhood isn't plowed normally so soem morning I have to start > > out > > > >>>>>in 4 high until I hit the main street. Then it might take 10-15 > > minutes > > > >>>>>to diesngage and lately when it finally disengages there is a massive > > > >>>>>pop when it disengages. I have tried going into reverse a few feet > > and > > > >>>>>then driving off but that doesn't seem to work. > > > >>>>> > > > >>>> > > > >>>> > > > >>>> > > > >>>-- > > > >>>Jerry Bransford > > > >>>PP-ASEL N6TAY > > > >>>See the Geezer Jeep at > > > >>>http://members.cox.net/jerrypb/ > > > >> > > > >> > > > >> > > > > > > > > -- > > > > Jerry Bransford > > > > PP-ASEL N6TAY > > > > See the Geezer Jeep at > > > > http://members.cox.net/jerrypb/ > > > > > > > > > > > > > -- > Will Honea |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
The way I remember it, this one wouldn't shift into 4-HI even with the
transmission in neutral, not until after we had killed the engine. Now either there is something lacking with my understanding of an automatic transmission in neutral, or there was something wrong with this one. Even with a synchro, I don't think that you are going to shift between 4-HI and 2-HI, if there is appreciable torque on the transfer case. Note that our Cherokee and the original poster's '97 didn't have front axle disconnects. Thanks to Matt for pointing that out. Earle "Will Honea" <whonea@yahoo.com> wrote in message news:JxX2tWiP5BNp-pn2-Fmwd2rxOq2Cg@anon.none.net... > 4LO to 4HI is a whole different ball game, Earle. That's one where > neutral and barely rolling (4HI to 4LO) or neutral and stopped (4LO to > 4HI) is pretty much necessary. There is nothing even close to a > syncro on the dog ring that locks/unlocks the planetary gears to > select low range - that damned thing will grind even if you are > parked, I swear. 4HI to 2HI and back has a synchro that helps out > some and if you have the newer model front axle that runs locked all > the chain drive gears are always spinng at very near the same speed as > the input drive anyway. Plus, there is a neutral between 4HI and 4LO > where there is no disengaed point in the 4HI to 2HI shift to allow a > speed mismatch. > > On Tue, 10 Jan 2006 01:56:40 UTC "Earle Horton" > <NurseBustersNoSpam@msn.com> wrote: > > > In the condo, second floor of the building. I was sitting down to a well > > deserved beer and a viewing of "Sabrina the Teen Age Witch", when I heard a > > "Holy Sh*t!" noise from the parking lot, and instantly hoped it wasn't mine. > > That hope was dashed pretty quick. As far as I could figure out, she had > > shifted onto 4-LO on entry to the slush filled parking lot. On the way out, > > she thought that 4-HI would be better. She was probably right, but once she > > got the transfer case into Neutral it wouldn't come out for anything, not > > until I came out and played with the automatic shifter, shut off the engine, > > and fiddled around with it for a few minutes. > > > > I hate to say that Jerry's advice is "just plain 'wrong' and ill-advised", > > but there you have it. > > > > Earle > > > > "Jo Bo" <jromas SPAM@columbus.rr.com> wrote in message > > news:p%Dwf.15070$%D1.8489@tornado.ohiordc.rr.com.. . > > > Jerry, > > > > > > Very sorry to disagree but I've had 2 automatic XJ's a 96 and a 99 and > > they > > > both need to be put in "N" on the transmission, not the transfer case, to > > > shift in or out of 4wd if your doing anything less then say 10 MPH there's > > > too much tension on it to shift. Also when standing still it's even worse > > if > > > the transmission is put into gear while the transfer case is in neutral. > > > That's the grinding the guy in the lodge heard his wife doing. Now a > > > standard shift is another matter, ease up on the gas and shift. Also the > > > vacuum disconnect is a totally different situation altogether. I also > > owned > > > a 89 5 speed. > > > > > > JoBo > > > > > > "Jerry Bransford" <jerrypb@cox.net> wrote in message > > > news:rCDwf.8826$V.7042@fed1read04... > > > > Jim, your '88 and my '89 Cherokee had the exact same transfer case and > > as > > > > the owners manual instructs, I NEVER had to do anything unusual like you > > > > suggest to get it to shift back into 2Hi beyond moving the t-case lever > > > > back to 2wd. Your advice saying he should shift into neutral before > > > > shifting back into 2wd is just plain 'wrong' and ill-advised. It is > > > > absolutely not necessary, the most that is ever needed to help > > accelerate > > > > the shift back into 2wd is to simply let off on the gas a bit. > > > > > > > > Jim Smith wrote: > > > >> Well, I've got a 1988 Cherokee that you have to do this. You can shift > > > >> on the fly, but it may take some time for it to shift. I found > > stopping > > > >> and putting the jeep into neutral makes it much quicker and without nay > > > >> noise or pop or bang. Just my observation. > > > >> > > > >> > > > >> Jim Smith > > > >> > > > >> "Jerry Bransford" <jerrypb@cox.net> wrote in message > > > >> news:jNwwf.8809$V.5954@fed1read04... > > > >> > > > >>>I hope you're not suggesting that that is necessary. :) > > > >>> > > > >>>Jim Smith wrote: > > > >>> > > > >>>>Just a quick question. Are you stopping the Jeep and putting the > > > >>>>transmission in neutral before shifting from 4H to 2H? > > > >>>> > > > >>>>Jim Smith > > > >>>> > > > >>>> > > > >>>><phillip_putzback@insightbb.com> wrote in message > > > >>>>news:1136815927.249344.47240@g49g2000cwa.googl egroups.com... > > > >>>> > > > >>>> > > > >>>>>I have the 4 low - 2 high and 4 high options for the transfer case. > > My > > > >>>>>neighborhood isn't plowed normally so soem morning I have to start > > out > > > >>>>>in 4 high until I hit the main street. Then it might take 10-15 > > minutes > > > >>>>>to diesngage and lately when it finally disengages there is a massive > > > >>>>>pop when it disengages. I have tried going into reverse a few feet > > and > > > >>>>>then driving off but that doesn't seem to work. > > > >>>>> > > > >>>> > > > >>>> > > > >>>> > > > >>>-- > > > >>>Jerry Bransford > > > >>>PP-ASEL N6TAY > > > >>>See the Geezer Jeep at > > > >>>http://members.cox.net/jerrypb/ > > > >> > > > >> > > > >> > > > > > > > > -- > > > > Jerry Bransford > > > > PP-ASEL N6TAY > > > > See the Geezer Jeep at > > > > http://members.cox.net/jerrypb/ > > > > > > > > > > > > > -- > Will Honea |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
The way I remember it, this one wouldn't shift into 4-HI even with the
transmission in neutral, not until after we had killed the engine. Now either there is something lacking with my understanding of an automatic transmission in neutral, or there was something wrong with this one. Even with a synchro, I don't think that you are going to shift between 4-HI and 2-HI, if there is appreciable torque on the transfer case. Note that our Cherokee and the original poster's '97 didn't have front axle disconnects. Thanks to Matt for pointing that out. Earle "Will Honea" <whonea@yahoo.com> wrote in message news:JxX2tWiP5BNp-pn2-Fmwd2rxOq2Cg@anon.none.net... > 4LO to 4HI is a whole different ball game, Earle. That's one where > neutral and barely rolling (4HI to 4LO) or neutral and stopped (4LO to > 4HI) is pretty much necessary. There is nothing even close to a > syncro on the dog ring that locks/unlocks the planetary gears to > select low range - that damned thing will grind even if you are > parked, I swear. 4HI to 2HI and back has a synchro that helps out > some and if you have the newer model front axle that runs locked all > the chain drive gears are always spinng at very near the same speed as > the input drive anyway. Plus, there is a neutral between 4HI and 4LO > where there is no disengaed point in the 4HI to 2HI shift to allow a > speed mismatch. > > On Tue, 10 Jan 2006 01:56:40 UTC "Earle Horton" > <NurseBustersNoSpam@msn.com> wrote: > > > In the condo, second floor of the building. I was sitting down to a well > > deserved beer and a viewing of "Sabrina the Teen Age Witch", when I heard a > > "Holy Sh*t!" noise from the parking lot, and instantly hoped it wasn't mine. > > That hope was dashed pretty quick. As far as I could figure out, she had > > shifted onto 4-LO on entry to the slush filled parking lot. On the way out, > > she thought that 4-HI would be better. She was probably right, but once she > > got the transfer case into Neutral it wouldn't come out for anything, not > > until I came out and played with the automatic shifter, shut off the engine, > > and fiddled around with it for a few minutes. > > > > I hate to say that Jerry's advice is "just plain 'wrong' and ill-advised", > > but there you have it. > > > > Earle > > > > "Jo Bo" <jromas SPAM@columbus.rr.com> wrote in message > > news:p%Dwf.15070$%D1.8489@tornado.ohiordc.rr.com.. . > > > Jerry, > > > > > > Very sorry to disagree but I've had 2 automatic XJ's a 96 and a 99 and > > they > > > both need to be put in "N" on the transmission, not the transfer case, to > > > shift in or out of 4wd if your doing anything less then say 10 MPH there's > > > too much tension on it to shift. Also when standing still it's even worse > > if > > > the transmission is put into gear while the transfer case is in neutral. > > > That's the grinding the guy in the lodge heard his wife doing. Now a > > > standard shift is another matter, ease up on the gas and shift. Also the > > > vacuum disconnect is a totally different situation altogether. I also > > owned > > > a 89 5 speed. > > > > > > JoBo > > > > > > "Jerry Bransford" <jerrypb@cox.net> wrote in message > > > news:rCDwf.8826$V.7042@fed1read04... > > > > Jim, your '88 and my '89 Cherokee had the exact same transfer case and > > as > > > > the owners manual instructs, I NEVER had to do anything unusual like you > > > > suggest to get it to shift back into 2Hi beyond moving the t-case lever > > > > back to 2wd. Your advice saying he should shift into neutral before > > > > shifting back into 2wd is just plain 'wrong' and ill-advised. It is > > > > absolutely not necessary, the most that is ever needed to help > > accelerate > > > > the shift back into 2wd is to simply let off on the gas a bit. > > > > > > > > Jim Smith wrote: > > > >> Well, I've got a 1988 Cherokee that you have to do this. You can shift > > > >> on the fly, but it may take some time for it to shift. I found > > stopping > > > >> and putting the jeep into neutral makes it much quicker and without nay > > > >> noise or pop or bang. Just my observation. > > > >> > > > >> > > > >> Jim Smith > > > >> > > > >> "Jerry Bransford" <jerrypb@cox.net> wrote in message > > > >> news:jNwwf.8809$V.5954@fed1read04... > > > >> > > > >>>I hope you're not suggesting that that is necessary. :) > > > >>> > > > >>>Jim Smith wrote: > > > >>> > > > >>>>Just a quick question. Are you stopping the Jeep and putting the > > > >>>>transmission in neutral before shifting from 4H to 2H? > > > >>>> > > > >>>>Jim Smith > > > >>>> > > > >>>> > > > >>>><phillip_putzback@insightbb.com> wrote in message > > > >>>>news:1136815927.249344.47240@g49g2000cwa.googl egroups.com... > > > >>>> > > > >>>> > > > >>>>>I have the 4 low - 2 high and 4 high options for the transfer case. > > My > > > >>>>>neighborhood isn't plowed normally so soem morning I have to start > > out > > > >>>>>in 4 high until I hit the main street. Then it might take 10-15 > > minutes > > > >>>>>to diesngage and lately when it finally disengages there is a massive > > > >>>>>pop when it disengages. I have tried going into reverse a few feet > > and > > > >>>>>then driving off but that doesn't seem to work. > > > >>>>> > > > >>>> > > > >>>> > > > >>>> > > > >>>-- > > > >>>Jerry Bransford > > > >>>PP-ASEL N6TAY > > > >>>See the Geezer Jeep at > > > >>>http://members.cox.net/jerrypb/ > > > >> > > > >> > > > >> > > > > > > > > -- > > > > Jerry Bransford > > > > PP-ASEL N6TAY > > > > See the Geezer Jeep at > > > > http://members.cox.net/jerrypb/ > > > > > > > > > > > > > -- > Will Honea |
Re: 97 Jeep Cherokee 4wd - 4wd Won't disengage
I'd say that you should consider switching to decaf. Jim Smith wrote: > So there are a few others that have to shift into Neutral. > > What do you have to say to that Jerry? > > > Jim Smith > > "Jo Bo" <jromas SPAM@columbus.rr.com> wrote in message > news:p%Dwf.15070$%D1.8489@tornado.ohiordc.rr.com.. . > >>Jerry, [snip] |
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