Re: Flat Tow Wrangler YJ (Informational - Long)
It doesn't matter what the cause is. If the front driveshaft won't turn
with the transfer case in neutral, then you have problems. I always have the engine running when I shift the transfer case into neutral, because sometimes you have to move the vehicle a little bit to get the gears to mesh, and because I know about the vacuum disconnect I guess. Note that the newer models don't have a front axle disconnect, and that you can still flat tow them if the transfer case has a neutral. I am talking about the TJs, newer Cherokees, GJs, etc. I am only going to do the check because you never know about things, not because I believe that there is anything to the OP's idea. Earle "nrs" <neale_rs@yahoo.com> wrote in message news:1170805228.075242.150940@k78g2000cwa.googlegr oups.com... .... > > I think you still need to lift one tire to do the check to know if the > driveshafts lock together. For instance, if the front axle is still > connected with the engine off (both front on the ground), then the > driveshft will not turn with the TC in N. This would make me think > (falsely) that the driveshafts are locked together. In order to > eliminate the posibility that the front axle is connected, one front > wheel should be off the ground. > > There are really two things to check: 1) does the axle stay connected > with the engine off, and 2) do the driveshafts lock together in N. > > |
Re: Flat Tow Wrangler YJ (Informational - Long)
It doesn't matter what the cause is. If the front driveshaft won't turn
with the transfer case in neutral, then you have problems. I always have the engine running when I shift the transfer case into neutral, because sometimes you have to move the vehicle a little bit to get the gears to mesh, and because I know about the vacuum disconnect I guess. Note that the newer models don't have a front axle disconnect, and that you can still flat tow them if the transfer case has a neutral. I am talking about the TJs, newer Cherokees, GJs, etc. I am only going to do the check because you never know about things, not because I believe that there is anything to the OP's idea. Earle "nrs" <neale_rs@yahoo.com> wrote in message news:1170805228.075242.150940@k78g2000cwa.googlegr oups.com... .... > > I think you still need to lift one tire to do the check to know if the > driveshafts lock together. For instance, if the front axle is still > connected with the engine off (both front on the ground), then the > driveshft will not turn with the TC in N. This would make me think > (falsely) that the driveshafts are locked together. In order to > eliminate the posibility that the front axle is connected, one front > wheel should be off the ground. > > There are really two things to check: 1) does the axle stay connected > with the engine off, and 2) do the driveshafts lock together in N. > > |
Re: Flat Tow Wrangler YJ (Informational - Long)
It doesn't matter what the cause is. If the front driveshaft won't turn
with the transfer case in neutral, then you have problems. I always have the engine running when I shift the transfer case into neutral, because sometimes you have to move the vehicle a little bit to get the gears to mesh, and because I know about the vacuum disconnect I guess. Note that the newer models don't have a front axle disconnect, and that you can still flat tow them if the transfer case has a neutral. I am talking about the TJs, newer Cherokees, GJs, etc. I am only going to do the check because you never know about things, not because I believe that there is anything to the OP's idea. Earle "nrs" <neale_rs@yahoo.com> wrote in message news:1170805228.075242.150940@k78g2000cwa.googlegr oups.com... .... > > I think you still need to lift one tire to do the check to know if the > driveshafts lock together. For instance, if the front axle is still > connected with the engine off (both front on the ground), then the > driveshft will not turn with the TC in N. This would make me think > (falsely) that the driveshafts are locked together. In order to > eliminate the posibility that the front axle is connected, one front > wheel should be off the ground. > > There are really two things to check: 1) does the axle stay connected > with the engine off, and 2) do the driveshafts lock together in N. > > |
Re: Flat Tow Wrangler YJ (Informational - Long)
On Feb 6, 6:39 pm, "Earle Horton" <a...@gracioso.usa> wrote:
> It doesn't matter what the cause is. If the front driveshaft won't turn > with the transfer case in neutral, then you have problems. I always have > the engine running when I shift the transfer case into neutral, because > sometimes you have to move the vehicle a little bit to get the gears to > mesh, and because I know about the vacuum disconnect I guess. Note that the > newer models don't have a front axle disconnect, and that you can still flat > tow them if the transfer case has a neutral. I am talking about the TJs, > newer Cherokees, GJs, etc. I am only going to do the check because you > never know about things, not because I believe that there is anything to the > OP's idea. > > Earle > > "nrs" <neale...@yahoo.com> wrote in message > > news:1170805228.075242.150940@k78g2000cwa.googlegr oups.com... > ... > > > > > > > I think you still need to lift one tire to do the check to know if the > > driveshafts lock together. For instance, if the front axle is still > > connected with the engine off (both front on the ground), then the > > driveshft will not turn with the TC in N. This would make me think > > (falsely) that the driveshafts are locked together. In order to > > eliminate the posibility that the front axle is connected, one front > > wheel should be off the ground. > > > There are really two things to check: 1) does the axle stay connected > > with the engine off, and 2) do the driveshafts lock together in N.- Hide quoted text - > > - Show quoted text - Makes sense, if they locked together towed TJ's would be trash by now. |
Re: Flat Tow Wrangler YJ (Informational - Long)
On Feb 6, 6:39 pm, "Earle Horton" <a...@gracioso.usa> wrote:
> It doesn't matter what the cause is. If the front driveshaft won't turn > with the transfer case in neutral, then you have problems. I always have > the engine running when I shift the transfer case into neutral, because > sometimes you have to move the vehicle a little bit to get the gears to > mesh, and because I know about the vacuum disconnect I guess. Note that the > newer models don't have a front axle disconnect, and that you can still flat > tow them if the transfer case has a neutral. I am talking about the TJs, > newer Cherokees, GJs, etc. I am only going to do the check because you > never know about things, not because I believe that there is anything to the > OP's idea. > > Earle > > "nrs" <neale...@yahoo.com> wrote in message > > news:1170805228.075242.150940@k78g2000cwa.googlegr oups.com... > ... > > > > > > > I think you still need to lift one tire to do the check to know if the > > driveshafts lock together. For instance, if the front axle is still > > connected with the engine off (both front on the ground), then the > > driveshft will not turn with the TC in N. This would make me think > > (falsely) that the driveshafts are locked together. In order to > > eliminate the posibility that the front axle is connected, one front > > wheel should be off the ground. > > > There are really two things to check: 1) does the axle stay connected > > with the engine off, and 2) do the driveshafts lock together in N.- Hide quoted text - > > - Show quoted text - Makes sense, if they locked together towed TJ's would be trash by now. |
Re: Flat Tow Wrangler YJ (Informational - Long)
On Feb 6, 6:39 pm, "Earle Horton" <a...@gracioso.usa> wrote:
> It doesn't matter what the cause is. If the front driveshaft won't turn > with the transfer case in neutral, then you have problems. I always have > the engine running when I shift the transfer case into neutral, because > sometimes you have to move the vehicle a little bit to get the gears to > mesh, and because I know about the vacuum disconnect I guess. Note that the > newer models don't have a front axle disconnect, and that you can still flat > tow them if the transfer case has a neutral. I am talking about the TJs, > newer Cherokees, GJs, etc. I am only going to do the check because you > never know about things, not because I believe that there is anything to the > OP's idea. > > Earle > > "nrs" <neale...@yahoo.com> wrote in message > > news:1170805228.075242.150940@k78g2000cwa.googlegr oups.com... > ... > > > > > > > I think you still need to lift one tire to do the check to know if the > > driveshafts lock together. For instance, if the front axle is still > > connected with the engine off (both front on the ground), then the > > driveshft will not turn with the TC in N. This would make me think > > (falsely) that the driveshafts are locked together. In order to > > eliminate the posibility that the front axle is connected, one front > > wheel should be off the ground. > > > There are really two things to check: 1) does the axle stay connected > > with the engine off, and 2) do the driveshafts lock together in N.- Hide quoted text - > > - Show quoted text - Makes sense, if they locked together towed TJ's would be trash by now. |
Re: Flat Tow Wrangler YJ (Informational - Long)
On Feb 6, 6:39 pm, "Earle Horton" <a...@gracioso.usa> wrote:
> It doesn't matter what the cause is. If the front driveshaft won't turn > with the transfer case in neutral, then you have problems. I always have > the engine running when I shift the transfer case into neutral, because > sometimes you have to move the vehicle a little bit to get the gears to > mesh, and because I know about the vacuum disconnect I guess. Note that the > newer models don't have a front axle disconnect, and that you can still flat > tow them if the transfer case has a neutral. I am talking about the TJs, > newer Cherokees, GJs, etc. I am only going to do the check because you > never know about things, not because I believe that there is anything to the > OP's idea. > > Earle > > "nrs" <neale...@yahoo.com> wrote in message > > news:1170805228.075242.150940@k78g2000cwa.googlegr oups.com... > ... > > > > > > > I think you still need to lift one tire to do the check to know if the > > driveshafts lock together. For instance, if the front axle is still > > connected with the engine off (both front on the ground), then the > > driveshft will not turn with the TC in N. This would make me think > > (falsely) that the driveshafts are locked together. In order to > > eliminate the posibility that the front axle is connected, one front > > wheel should be off the ground. > > > There are really two things to check: 1) does the axle stay connected > > with the engine off, and 2) do the driveshafts lock together in N.- Hide quoted text - > > - Show quoted text - Makes sense, if they locked together towed TJ's would be trash by now. |
Re: Flat Tow Wrangler YJ (Informational - Long)
OK, so with my '84 CJ, AMC 20, Dana 300, and NV4500, I should put the t-case
in neutral and put the tranny in a gear. Do I need to disconnect the rear drive shaft? Or, what is the downside of putting locking hubs on the rear? "L.W. (Bill) ------ III" <----------@cox.net> wrote in message news:52scpuF1o2nm0U1@mid.individual.net... > That's true with the Dana 20 and 300 with only one lever. I would > appreciate it is someone with New Process transfer would confirm this, by > simple putting theirs in neutral and jack up a front wheel, if they don't > free wheeling hubs and see if you can turn the front driveshaft. I don't > believe it's true, because this would quickly destroy one of the > differentials. > God Bless America, Bill 0|||||||0 > mailto:-------------------- http://www.----------.com/ > > <edh3007@bellsouth.net> wrote in message > news:1170785062.593064.102050@v33g2000cwv.googlegr oups.com... >> I have a 1991 Jeep Wrangler YJ with the 2.5L four-cylinder and stock >> five speed manual transmission. I assume it has the standard NP-231 >> transfer case. >> >> Although I have successfully flat-towed my YJ (maximum of about 400 >> miles one-way and then return about a week later), I've recently >> learned that the NP-231 (at least of this era) does not have a "true" >> neutral position. Instead, while it does uncouple the transmission >> from the transfer case, it also couples the front and rear outputs >> together. If the front axle is engaged this causes gear backlash with >> the potential to destroy the transfer case. If the Center Axle >> Disconnect (CAD) on the front axle is disconnected (disengaged?), then >> the backlash is eliminated. >> >> The problem is that the vacuum operated CAD stays in the last position >> it was put in. If you are preparing your YJ for flat towing and you >> start the engine, the moment you shift the transfer case from 2WD to >> Neutral the vacuum CAD engages the front axle. There you are with the >> outputs of the transfer case locked together and the front axle live >> instead of free-wheeling. Leaving you with the potential of blowing up >> the transfer case. >> >> The standard way to disengage the CAD under normal conditions (i.e. >> you've been in 4WD and are now ready to resume normal 2WD operation) >> is to place the transfer case into 2WD and then put the transmission >> into reverse and back up several feet. This puts the front axle back >> into free-wheeling mode (assuming everything is working properly), and >> you can put the transmission into normal gear and drive off. >> >> If you know the CAD is in this state then you can prepare for towing >> simply by putting the transfer case into neutral without starting the >> engine (no vacuum). Go ahead and put the transmission into neutral, >> hook up to your tow vehicle and go. Some people recommend that you >> leave the transmission in gear while towing. Since you have >> disconnected the transmission when you put the transfer case in >> neutral, this should not be necessary. Further, if the transmission is >> in gear and the transfer case is accidently engaged (by a severe bump >> maybe?) there will be bad consequences. You don't have to worry about >> the transfer case lubrication because the rear output (which is >> engaged) also drives the internal oil pump. As long as the CAD is >> disengaged you are ready to tow. >> >> Apparently when I've towed my YJ I been fortunate in that a)I >> typically back in to park, therefore I've left the jeep with the CAD >> disengaged and b)I normally don't have any reason to start the jeep >> prior to putting the transfer case into neutral before hooking it up >> to be towed. Since I didn't understand what I was doing, I could very >> easily have destroyed my transfer case without knowing why. >> >> Although I am comfortable with this, knowing how things work, there >> are alternatives I discovered as I researched this issue. >> >> 1)Assuming that the CAD is already disengaged, you can just disconnect >> the vacuum line from the CAD box. You'd be fine to start your engine >> and move the jeep to the towing vehicle, hook up, put the transfer >> case and transmission in neutral and go. >> >> 2)Install and use a Posi-Lock device instead of the vacuum CAD. Since >> you control the front axle lock by cable, you should know the state it >> is in. >> >> 3)Install and use external locking hubs. Not pleasant to use in foul >> weather, but again you always know the state of the front axle because >> you set it. >> >> 4)Install a transfer case conversion that gives you a true neutral. >> You'd never have to worry about the state of the front axle when you >> put the transfer case into neutral then. >> >> 5)Finally, of course, you can always tow your jeep on a trailer. >> >> Comments and questions are welcome. >> >> Your mileage may vary. >> Vehicles in mirror are closer than they appear. >> Cheers, Ed Humphries >> Atlanta, Georgia >> > > |
Re: Flat Tow Wrangler YJ (Informational - Long)
OK, so with my '84 CJ, AMC 20, Dana 300, and NV4500, I should put the t-case
in neutral and put the tranny in a gear. Do I need to disconnect the rear drive shaft? Or, what is the downside of putting locking hubs on the rear? "L.W. (Bill) ------ III" <----------@cox.net> wrote in message news:52scpuF1o2nm0U1@mid.individual.net... > That's true with the Dana 20 and 300 with only one lever. I would > appreciate it is someone with New Process transfer would confirm this, by > simple putting theirs in neutral and jack up a front wheel, if they don't > free wheeling hubs and see if you can turn the front driveshaft. I don't > believe it's true, because this would quickly destroy one of the > differentials. > God Bless America, Bill 0|||||||0 > mailto:-------------------- http://www.----------.com/ > > <edh3007@bellsouth.net> wrote in message > news:1170785062.593064.102050@v33g2000cwv.googlegr oups.com... >> I have a 1991 Jeep Wrangler YJ with the 2.5L four-cylinder and stock >> five speed manual transmission. I assume it has the standard NP-231 >> transfer case. >> >> Although I have successfully flat-towed my YJ (maximum of about 400 >> miles one-way and then return about a week later), I've recently >> learned that the NP-231 (at least of this era) does not have a "true" >> neutral position. Instead, while it does uncouple the transmission >> from the transfer case, it also couples the front and rear outputs >> together. If the front axle is engaged this causes gear backlash with >> the potential to destroy the transfer case. If the Center Axle >> Disconnect (CAD) on the front axle is disconnected (disengaged?), then >> the backlash is eliminated. >> >> The problem is that the vacuum operated CAD stays in the last position >> it was put in. If you are preparing your YJ for flat towing and you >> start the engine, the moment you shift the transfer case from 2WD to >> Neutral the vacuum CAD engages the front axle. There you are with the >> outputs of the transfer case locked together and the front axle live >> instead of free-wheeling. Leaving you with the potential of blowing up >> the transfer case. >> >> The standard way to disengage the CAD under normal conditions (i.e. >> you've been in 4WD and are now ready to resume normal 2WD operation) >> is to place the transfer case into 2WD and then put the transmission >> into reverse and back up several feet. This puts the front axle back >> into free-wheeling mode (assuming everything is working properly), and >> you can put the transmission into normal gear and drive off. >> >> If you know the CAD is in this state then you can prepare for towing >> simply by putting the transfer case into neutral without starting the >> engine (no vacuum). Go ahead and put the transmission into neutral, >> hook up to your tow vehicle and go. Some people recommend that you >> leave the transmission in gear while towing. Since you have >> disconnected the transmission when you put the transfer case in >> neutral, this should not be necessary. Further, if the transmission is >> in gear and the transfer case is accidently engaged (by a severe bump >> maybe?) there will be bad consequences. You don't have to worry about >> the transfer case lubrication because the rear output (which is >> engaged) also drives the internal oil pump. As long as the CAD is >> disengaged you are ready to tow. >> >> Apparently when I've towed my YJ I been fortunate in that a)I >> typically back in to park, therefore I've left the jeep with the CAD >> disengaged and b)I normally don't have any reason to start the jeep >> prior to putting the transfer case into neutral before hooking it up >> to be towed. Since I didn't understand what I was doing, I could very >> easily have destroyed my transfer case without knowing why. >> >> Although I am comfortable with this, knowing how things work, there >> are alternatives I discovered as I researched this issue. >> >> 1)Assuming that the CAD is already disengaged, you can just disconnect >> the vacuum line from the CAD box. You'd be fine to start your engine >> and move the jeep to the towing vehicle, hook up, put the transfer >> case and transmission in neutral and go. >> >> 2)Install and use a Posi-Lock device instead of the vacuum CAD. Since >> you control the front axle lock by cable, you should know the state it >> is in. >> >> 3)Install and use external locking hubs. Not pleasant to use in foul >> weather, but again you always know the state of the front axle because >> you set it. >> >> 4)Install a transfer case conversion that gives you a true neutral. >> You'd never have to worry about the state of the front axle when you >> put the transfer case into neutral then. >> >> 5)Finally, of course, you can always tow your jeep on a trailer. >> >> Comments and questions are welcome. >> >> Your mileage may vary. >> Vehicles in mirror are closer than they appear. >> Cheers, Ed Humphries >> Atlanta, Georgia >> > > |
Re: Flat Tow Wrangler YJ (Informational - Long)
OK, so with my '84 CJ, AMC 20, Dana 300, and NV4500, I should put the t-case
in neutral and put the tranny in a gear. Do I need to disconnect the rear drive shaft? Or, what is the downside of putting locking hubs on the rear? "L.W. (Bill) ------ III" <----------@cox.net> wrote in message news:52scpuF1o2nm0U1@mid.individual.net... > That's true with the Dana 20 and 300 with only one lever. I would > appreciate it is someone with New Process transfer would confirm this, by > simple putting theirs in neutral and jack up a front wheel, if they don't > free wheeling hubs and see if you can turn the front driveshaft. I don't > believe it's true, because this would quickly destroy one of the > differentials. > God Bless America, Bill 0|||||||0 > mailto:-------------------- http://www.----------.com/ > > <edh3007@bellsouth.net> wrote in message > news:1170785062.593064.102050@v33g2000cwv.googlegr oups.com... >> I have a 1991 Jeep Wrangler YJ with the 2.5L four-cylinder and stock >> five speed manual transmission. I assume it has the standard NP-231 >> transfer case. >> >> Although I have successfully flat-towed my YJ (maximum of about 400 >> miles one-way and then return about a week later), I've recently >> learned that the NP-231 (at least of this era) does not have a "true" >> neutral position. Instead, while it does uncouple the transmission >> from the transfer case, it also couples the front and rear outputs >> together. If the front axle is engaged this causes gear backlash with >> the potential to destroy the transfer case. If the Center Axle >> Disconnect (CAD) on the front axle is disconnected (disengaged?), then >> the backlash is eliminated. >> >> The problem is that the vacuum operated CAD stays in the last position >> it was put in. If you are preparing your YJ for flat towing and you >> start the engine, the moment you shift the transfer case from 2WD to >> Neutral the vacuum CAD engages the front axle. There you are with the >> outputs of the transfer case locked together and the front axle live >> instead of free-wheeling. Leaving you with the potential of blowing up >> the transfer case. >> >> The standard way to disengage the CAD under normal conditions (i.e. >> you've been in 4WD and are now ready to resume normal 2WD operation) >> is to place the transfer case into 2WD and then put the transmission >> into reverse and back up several feet. This puts the front axle back >> into free-wheeling mode (assuming everything is working properly), and >> you can put the transmission into normal gear and drive off. >> >> If you know the CAD is in this state then you can prepare for towing >> simply by putting the transfer case into neutral without starting the >> engine (no vacuum). Go ahead and put the transmission into neutral, >> hook up to your tow vehicle and go. Some people recommend that you >> leave the transmission in gear while towing. Since you have >> disconnected the transmission when you put the transfer case in >> neutral, this should not be necessary. Further, if the transmission is >> in gear and the transfer case is accidently engaged (by a severe bump >> maybe?) there will be bad consequences. You don't have to worry about >> the transfer case lubrication because the rear output (which is >> engaged) also drives the internal oil pump. As long as the CAD is >> disengaged you are ready to tow. >> >> Apparently when I've towed my YJ I been fortunate in that a)I >> typically back in to park, therefore I've left the jeep with the CAD >> disengaged and b)I normally don't have any reason to start the jeep >> prior to putting the transfer case into neutral before hooking it up >> to be towed. Since I didn't understand what I was doing, I could very >> easily have destroyed my transfer case without knowing why. >> >> Although I am comfortable with this, knowing how things work, there >> are alternatives I discovered as I researched this issue. >> >> 1)Assuming that the CAD is already disengaged, you can just disconnect >> the vacuum line from the CAD box. You'd be fine to start your engine >> and move the jeep to the towing vehicle, hook up, put the transfer >> case and transmission in neutral and go. >> >> 2)Install and use a Posi-Lock device instead of the vacuum CAD. Since >> you control the front axle lock by cable, you should know the state it >> is in. >> >> 3)Install and use external locking hubs. Not pleasant to use in foul >> weather, but again you always know the state of the front axle because >> you set it. >> >> 4)Install a transfer case conversion that gives you a true neutral. >> You'd never have to worry about the state of the front axle when you >> put the transfer case into neutral then. >> >> 5)Finally, of course, you can always tow your jeep on a trailer. >> >> Comments and questions are welcome. >> >> Your mileage may vary. >> Vehicles in mirror are closer than they appear. >> Cheers, Ed Humphries >> Atlanta, Georgia >> > > |
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