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Re: RIM SIZE FOR 2006 WRANGLER X
In article <46cef51f$0$1800$9a6e19ea@unlimited.newshosting.co m>,
Mike Romain <romainm@sympatico.ca> wrote: #No, your new tires 'are' a stock size that is available for the J in #some trim packages. That is also why your speedometer 'may' become #correct with the 31's. (It used to work that way, but the new computer #tweaking might make yours different, you will just have to check) I use a GPS to check my speedometer on my 04 TJ and it's off by 10% or so (reads 55 mph while the gps says 50 mph). This is with stock Rubicon MT/Rs. /herb |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> On Aug 24, 11:13 am, Mike Romain <roma...@sympatico.ca> wrote: >> Tracie wrote: >>> On Aug 24, 10:06 am, Tracie <brain...@upstate.edu> wrote: >>>> On Aug 24, 9:42 am, Mike Romain <roma...@sympatico.ca> wrote: >>>>> What 'are' you talking about? >>>>> The front has a double cardan or CV joint already so needs 'no tweaking' >>>>> at all even for a larger lift and a 2" is not going to change the rear >>>>> enough to matter. >>>>> You get that much/more change with a load on or off. >>>>> By your reckoning if I put 4 people and gear in my Jeep, it won't drive >>>>> because my height will be off by at least 2". >>>>> Mike >>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >>>>> Canadian Off Road Trips Photos: Non members can still view! >>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >>>>> (More Off Road album links at bottom of the view page) >>>>> Bill Spiliotopoulos wrote: >>>>>>> 2.) With the 2" spacer lift, would I have to drop the t-case or do >>>>>>> any other mods besides slapping it on? >>>>>> Yes. >>>>>> You have to turn the rear axle forward, so that the pinion axis is almost >>>>>> parallel (a bit lower) to the transfer case output shaft. Or drop the >>>>>> transfer case 1/2 inch. Turning the rear axle forward will cost more if you >>>>>> have a shop do it for you (requires either adjustable lower arms, or >>>>>> elongating the upper arms rear mounting holes and installing an eccentric >>>>>> washer to set the pinion angle). You may not be sensitive enough to feel the >>>>>> vibes, but even with 1 inch lift, the pinion angle gets misaligned, >>>>>> increasing mechanical noise and u-joint wear. >>>>>> You also MUST rotate the front axle towards the rear to make the pinion axis >>>>>> parallel with the front driveshaft. >>>>>> This will restore the caster angle to factory specification, which is very >>>>>> important to limit the occurence of death wobble. The toe-in on the front >>>>>> axle must be set after the pinion angle is set for the front axle. >>>>>> The 2" spacer lift and 31" M/T tire combination is a very good combination. >>>>>> If you disconnect the front sway-bar the off-road capability of your rig >>>>>> will be dramatically increased compared to what it is right now. With the >>>>>> say-bar connected, your on-road behavior will not be much affected. >>>>>> This is a picture of a 2006 TJ with 2" spacer lift and 235R15 tires with the >>>>>> swaay-bar disconnected. >>>>>> http://alma-tech.com/tmp/tj_flex.jpg >>>>>> But you must find a shop that is willing to deal with all the "minor" >>>>>> details required to make the car run comfortable and safe as it was prior to >>>>>> the lift (fine tune the pinion angles). >>>>>> Bill Spiliotopoulos, >>>>>> '96 XJ >>>>>> '06 TJ.- Hide quoted text - >>>>> - Show quoted text - >>>> Yippee!! I got my BF Goodrich Mud Terrains today! I will be getting >>>> them installed this weekend. They are the 31 X 10.5 X 15. They are >>>> AWESOME looking! >>>> I just have a question. I will be getting a 2.25" coil spacer lift >>>> with new shocks sometime in the near future. I just wanted to get the >>>> new tires and get them put on first before I did the lift. Do I need >>>> an alignment with new tires, or should I wait until I get the lift >>>> done to get the alignment? >>>> THANKS- Hide quoted text - >>>> - Show quoted text - >>> One more question....should I get my stock steering stabilizer >>> replaced with a more heavy duty one due to the increase in the size of >>> the tires? I am going from 215/75/15 up to 31 X 10.5 X 15. >> No, your new tires 'are' a stock size that is available for the J in >> some trim packages. That is also why your speedometer 'may' become >> correct with the 31's. (It used to work that way, but the new computer >> tweaking might make yours different, you will just have to check) >> >> Now if you start off roading hard, then a new stabilizer may be in order. >> >> Your 'perceived' gas mileage will drop for sure unless the speedometer >> gets changed because the new tires travel farther than the old one for >> every rpm. >> >> Mike >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >> Canadian Off Road Trips Photos: Non members can still view! >> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >> (More Off Road album links at bottom of the view page)- Hide quoted text - >> >> - Show quoted text - > > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Yes, always get your vehicle aligned when you change suspension/steering components. Any time you lift or lower a vehicle, the alignment will change, at least slightly. Chris |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> On Aug 24, 11:13 am, Mike Romain <roma...@sympatico.ca> wrote: >> Tracie wrote: >>> On Aug 24, 10:06 am, Tracie <brain...@upstate.edu> wrote: >>>> On Aug 24, 9:42 am, Mike Romain <roma...@sympatico.ca> wrote: >>>>> What 'are' you talking about? >>>>> The front has a double cardan or CV joint already so needs 'no tweaking' >>>>> at all even for a larger lift and a 2" is not going to change the rear >>>>> enough to matter. >>>>> You get that much/more change with a load on or off. >>>>> By your reckoning if I put 4 people and gear in my Jeep, it won't drive >>>>> because my height will be off by at least 2". >>>>> Mike >>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >>>>> Canadian Off Road Trips Photos: Non members can still view! >>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >>>>> (More Off Road album links at bottom of the view page) >>>>> Bill Spiliotopoulos wrote: >>>>>>> 2.) With the 2" spacer lift, would I have to drop the t-case or do >>>>>>> any other mods besides slapping it on? >>>>>> Yes. >>>>>> You have to turn the rear axle forward, so that the pinion axis is almost >>>>>> parallel (a bit lower) to the transfer case output shaft. Or drop the >>>>>> transfer case 1/2 inch. Turning the rear axle forward will cost more if you >>>>>> have a shop do it for you (requires either adjustable lower arms, or >>>>>> elongating the upper arms rear mounting holes and installing an eccentric >>>>>> washer to set the pinion angle). You may not be sensitive enough to feel the >>>>>> vibes, but even with 1 inch lift, the pinion angle gets misaligned, >>>>>> increasing mechanical noise and u-joint wear. >>>>>> You also MUST rotate the front axle towards the rear to make the pinion axis >>>>>> parallel with the front driveshaft. >>>>>> This will restore the caster angle to factory specification, which is very >>>>>> important to limit the occurence of death wobble. The toe-in on the front >>>>>> axle must be set after the pinion angle is set for the front axle. >>>>>> The 2" spacer lift and 31" M/T tire combination is a very good combination. >>>>>> If you disconnect the front sway-bar the off-road capability of your rig >>>>>> will be dramatically increased compared to what it is right now. With the >>>>>> say-bar connected, your on-road behavior will not be much affected. >>>>>> This is a picture of a 2006 TJ with 2" spacer lift and 235R15 tires with the >>>>>> swaay-bar disconnected. >>>>>> http://alma-tech.com/tmp/tj_flex.jpg >>>>>> But you must find a shop that is willing to deal with all the "minor" >>>>>> details required to make the car run comfortable and safe as it was prior to >>>>>> the lift (fine tune the pinion angles). >>>>>> Bill Spiliotopoulos, >>>>>> '96 XJ >>>>>> '06 TJ.- Hide quoted text - >>>>> - Show quoted text - >>>> Yippee!! I got my BF Goodrich Mud Terrains today! I will be getting >>>> them installed this weekend. They are the 31 X 10.5 X 15. They are >>>> AWESOME looking! >>>> I just have a question. I will be getting a 2.25" coil spacer lift >>>> with new shocks sometime in the near future. I just wanted to get the >>>> new tires and get them put on first before I did the lift. Do I need >>>> an alignment with new tires, or should I wait until I get the lift >>>> done to get the alignment? >>>> THANKS- Hide quoted text - >>>> - Show quoted text - >>> One more question....should I get my stock steering stabilizer >>> replaced with a more heavy duty one due to the increase in the size of >>> the tires? I am going from 215/75/15 up to 31 X 10.5 X 15. >> No, your new tires 'are' a stock size that is available for the J in >> some trim packages. That is also why your speedometer 'may' become >> correct with the 31's. (It used to work that way, but the new computer >> tweaking might make yours different, you will just have to check) >> >> Now if you start off roading hard, then a new stabilizer may be in order. >> >> Your 'perceived' gas mileage will drop for sure unless the speedometer >> gets changed because the new tires travel farther than the old one for >> every rpm. >> >> Mike >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >> Canadian Off Road Trips Photos: Non members can still view! >> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >> (More Off Road album links at bottom of the view page)- Hide quoted text - >> >> - Show quoted text - > > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Yes, always get your vehicle aligned when you change suspension/steering components. Any time you lift or lower a vehicle, the alignment will change, at least slightly. Chris |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> On Aug 24, 11:13 am, Mike Romain <roma...@sympatico.ca> wrote: >> Tracie wrote: >>> On Aug 24, 10:06 am, Tracie <brain...@upstate.edu> wrote: >>>> On Aug 24, 9:42 am, Mike Romain <roma...@sympatico.ca> wrote: >>>>> What 'are' you talking about? >>>>> The front has a double cardan or CV joint already so needs 'no tweaking' >>>>> at all even for a larger lift and a 2" is not going to change the rear >>>>> enough to matter. >>>>> You get that much/more change with a load on or off. >>>>> By your reckoning if I put 4 people and gear in my Jeep, it won't drive >>>>> because my height will be off by at least 2". >>>>> Mike >>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >>>>> Canadian Off Road Trips Photos: Non members can still view! >>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >>>>> (More Off Road album links at bottom of the view page) >>>>> Bill Spiliotopoulos wrote: >>>>>>> 2.) With the 2" spacer lift, would I have to drop the t-case or do >>>>>>> any other mods besides slapping it on? >>>>>> Yes. >>>>>> You have to turn the rear axle forward, so that the pinion axis is almost >>>>>> parallel (a bit lower) to the transfer case output shaft. Or drop the >>>>>> transfer case 1/2 inch. Turning the rear axle forward will cost more if you >>>>>> have a shop do it for you (requires either adjustable lower arms, or >>>>>> elongating the upper arms rear mounting holes and installing an eccentric >>>>>> washer to set the pinion angle). You may not be sensitive enough to feel the >>>>>> vibes, but even with 1 inch lift, the pinion angle gets misaligned, >>>>>> increasing mechanical noise and u-joint wear. >>>>>> You also MUST rotate the front axle towards the rear to make the pinion axis >>>>>> parallel with the front driveshaft. >>>>>> This will restore the caster angle to factory specification, which is very >>>>>> important to limit the occurence of death wobble. The toe-in on the front >>>>>> axle must be set after the pinion angle is set for the front axle. >>>>>> The 2" spacer lift and 31" M/T tire combination is a very good combination. >>>>>> If you disconnect the front sway-bar the off-road capability of your rig >>>>>> will be dramatically increased compared to what it is right now. With the >>>>>> say-bar connected, your on-road behavior will not be much affected. >>>>>> This is a picture of a 2006 TJ with 2" spacer lift and 235R15 tires with the >>>>>> swaay-bar disconnected. >>>>>> http://alma-tech.com/tmp/tj_flex.jpg >>>>>> But you must find a shop that is willing to deal with all the "minor" >>>>>> details required to make the car run comfortable and safe as it was prior to >>>>>> the lift (fine tune the pinion angles). >>>>>> Bill Spiliotopoulos, >>>>>> '96 XJ >>>>>> '06 TJ.- Hide quoted text - >>>>> - Show quoted text - >>>> Yippee!! I got my BF Goodrich Mud Terrains today! I will be getting >>>> them installed this weekend. They are the 31 X 10.5 X 15. They are >>>> AWESOME looking! >>>> I just have a question. I will be getting a 2.25" coil spacer lift >>>> with new shocks sometime in the near future. I just wanted to get the >>>> new tires and get them put on first before I did the lift. Do I need >>>> an alignment with new tires, or should I wait until I get the lift >>>> done to get the alignment? >>>> THANKS- Hide quoted text - >>>> - Show quoted text - >>> One more question....should I get my stock steering stabilizer >>> replaced with a more heavy duty one due to the increase in the size of >>> the tires? I am going from 215/75/15 up to 31 X 10.5 X 15. >> No, your new tires 'are' a stock size that is available for the J in >> some trim packages. That is also why your speedometer 'may' become >> correct with the 31's. (It used to work that way, but the new computer >> tweaking might make yours different, you will just have to check) >> >> Now if you start off roading hard, then a new stabilizer may be in order. >> >> Your 'perceived' gas mileage will drop for sure unless the speedometer >> gets changed because the new tires travel farther than the old one for >> every rpm. >> >> Mike >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >> Canadian Off Road Trips Photos: Non members can still view! >> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >> (More Off Road album links at bottom of the view page)- Hide quoted text - >> >> - Show quoted text - > > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Yes, always get your vehicle aligned when you change suspension/steering components. Any time you lift or lower a vehicle, the alignment will change, at least slightly. Chris |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> On Aug 24, 11:13 am, Mike Romain <roma...@sympatico.ca> wrote: >> Tracie wrote: >>> On Aug 24, 10:06 am, Tracie <brain...@upstate.edu> wrote: >>>> On Aug 24, 9:42 am, Mike Romain <roma...@sympatico.ca> wrote: >>>>> What 'are' you talking about? >>>>> The front has a double cardan or CV joint already so needs 'no tweaking' >>>>> at all even for a larger lift and a 2" is not going to change the rear >>>>> enough to matter. >>>>> You get that much/more change with a load on or off. >>>>> By your reckoning if I put 4 people and gear in my Jeep, it won't drive >>>>> because my height will be off by at least 2". >>>>> Mike >>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >>>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >>>>> Canadian Off Road Trips Photos: Non members can still view! >>>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >>>>> (More Off Road album links at bottom of the view page) >>>>> Bill Spiliotopoulos wrote: >>>>>>> 2.) With the 2" spacer lift, would I have to drop the t-case or do >>>>>>> any other mods besides slapping it on? >>>>>> Yes. >>>>>> You have to turn the rear axle forward, so that the pinion axis is almost >>>>>> parallel (a bit lower) to the transfer case output shaft. Or drop the >>>>>> transfer case 1/2 inch. Turning the rear axle forward will cost more if you >>>>>> have a shop do it for you (requires either adjustable lower arms, or >>>>>> elongating the upper arms rear mounting holes and installing an eccentric >>>>>> washer to set the pinion angle). You may not be sensitive enough to feel the >>>>>> vibes, but even with 1 inch lift, the pinion angle gets misaligned, >>>>>> increasing mechanical noise and u-joint wear. >>>>>> You also MUST rotate the front axle towards the rear to make the pinion axis >>>>>> parallel with the front driveshaft. >>>>>> This will restore the caster angle to factory specification, which is very >>>>>> important to limit the occurence of death wobble. The toe-in on the front >>>>>> axle must be set after the pinion angle is set for the front axle. >>>>>> The 2" spacer lift and 31" M/T tire combination is a very good combination. >>>>>> If you disconnect the front sway-bar the off-road capability of your rig >>>>>> will be dramatically increased compared to what it is right now. With the >>>>>> say-bar connected, your on-road behavior will not be much affected. >>>>>> This is a picture of a 2006 TJ with 2" spacer lift and 235R15 tires with the >>>>>> swaay-bar disconnected. >>>>>> http://alma-tech.com/tmp/tj_flex.jpg >>>>>> But you must find a shop that is willing to deal with all the "minor" >>>>>> details required to make the car run comfortable and safe as it was prior to >>>>>> the lift (fine tune the pinion angles). >>>>>> Bill Spiliotopoulos, >>>>>> '96 XJ >>>>>> '06 TJ.- Hide quoted text - >>>>> - Show quoted text - >>>> Yippee!! I got my BF Goodrich Mud Terrains today! I will be getting >>>> them installed this weekend. They are the 31 X 10.5 X 15. They are >>>> AWESOME looking! >>>> I just have a question. I will be getting a 2.25" coil spacer lift >>>> with new shocks sometime in the near future. I just wanted to get the >>>> new tires and get them put on first before I did the lift. Do I need >>>> an alignment with new tires, or should I wait until I get the lift >>>> done to get the alignment? >>>> THANKS- Hide quoted text - >>>> - Show quoted text - >>> One more question....should I get my stock steering stabilizer >>> replaced with a more heavy duty one due to the increase in the size of >>> the tires? I am going from 215/75/15 up to 31 X 10.5 X 15. >> No, your new tires 'are' a stock size that is available for the J in >> some trim packages. That is also why your speedometer 'may' become >> correct with the 31's. (It used to work that way, but the new computer >> tweaking might make yours different, you will just have to check) >> >> Now if you start off roading hard, then a new stabilizer may be in order. >> >> Your 'perceived' gas mileage will drop for sure unless the speedometer >> gets changed because the new tires travel farther than the old one for >> every rpm. >> >> Mike >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 >> 88 Cherokee 235 BFG AT's - Gone to the rust pile... >> Canadian Off Road Trips Photos: Non members can still view! >> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590 >> (More Off Road album links at bottom of the view page)- Hide quoted text - >> >> - Show quoted text - > > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Yes, always get your vehicle aligned when you change suspension/steering components. Any time you lift or lower a vehicle, the alignment will change, at least slightly. Chris |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Correct, a toe in alignment and a drag link alignment to set up the steering wheel. I recommend you bounce the Jeep off road before doing the drag link alignment because they tend to settle in a bit after the lift is used so the steering wheel will then move again. This can be done in the driveway if you are handy with tools, if not, use a shop. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Correct, a toe in alignment and a drag link alignment to set up the steering wheel. I recommend you bounce the Jeep off road before doing the drag link alignment because they tend to settle in a bit after the lift is used so the steering wheel will then move again. This can be done in the driveway if you are handy with tools, if not, use a shop. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Correct, a toe in alignment and a drag link alignment to set up the steering wheel. I recommend you bounce the Jeep off road before doing the drag link alignment because they tend to settle in a bit after the lift is used so the steering wheel will then move again. This can be done in the driveway if you are handy with tools, if not, use a shop. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: RIM SIZE FOR 2006 WRANGLER X
Tracie wrote:
> > So as far as the alignment goes, I take it that I will need one AFTER > the lift is installed? > Correct, a toe in alignment and a drag link alignment to set up the steering wheel. I recommend you bounce the Jeep off road before doing the drag link alignment because they tend to settle in a bit after the lift is used so the steering wheel will then move again. This can be done in the driveway if you are handy with tools, if not, use a shop. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: RIM SIZE FOR 2006 WRANGLER X
I have to remind you that the TJ has a coil sprung suspension with upper and
lower arms, which alter the pinion angle when it is raised - lowered, unlike the leaf sprung suspensions which keep the pinion angle constant. Raising 2" does create driveline vibes because the rear pinion is no longer parallel to the transfer case output shaft. You can chose to ignore them or may not notice they are there, but the truth is that they exist. I have seen TJ of friends of mine that said they didn't have any driveline vibes after a 2" lift, but when I drove their rig I could feel the difference. With a mismatch in pinion - output shaft angle, it feels like the engine is running rough and they blame the engine or the exhaust. The only way to convince them was to drop their thansfer case 1/2 inch and ask them if they cound feel the difference, which they could. Yes, the TJ has a double cardan joint in the transfer case front end, which requires the pinion angle to be set almost parallel to the driveshaft (0.5 degrees lower). You won't notice driveline vibes when in 2wd mode though. But the front pinion angle also affects the front caster angle. By raising 2" in the TJ, the caster increases from -7 degrees to about -5. The front pinion also gets 2 degrees higher than the driveshaft. By re-adjusting the front pinion angle, you fix the caster angle also. When the front pinion is adjusted properly, you loose only 0.3 degrees of caster angle for the 2" lift compared to the factory caster setting. Now I speak all this from personal experience on the exact same vehicle as the O.P., as I have installed the same lift on my TJ and setting the pinion angles was what made it to ride smooth like stock again. About adding cargo and upsetting the rear driveline angle to create vibes, this is what happens in the TJ. There is a range that the pinion angle may be off, which doesn't create noticeable vibes. The rear pinion is set to the upper side of this range. When you load the TJ and the suspension its lower, the rear pinion will operate to the lower side of the range, and you won't get any vibes. With slight load, the pinion angle is at the center of the range and it feels like running a bit smoother. But if you remove the hardtop and the rear seat, which makes the suspension sit higher, you will notice driveline vibes. Bill Spiliotopoulos, '96 XJ, '06 TJ. ? "Mike Romain" <romainm@sympatico.ca> ?????? ??? ?????? news:46cedfd9$0$5203$9a6e19ea@unlimited.newshostin g.com... > What 'are' you talking about? > > The front has a double cardan or CV joint already so needs 'no tweaking' > at all even for a larger lift and a 2" is not going to change the rear > enough to matter. > > You get that much/more change with a load on or off. > > By your reckoning if I put 4 people and gear in my Jeep, it won't drive > because my height will be off by at least 2". > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's - Gone to the rust pile... > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > Bill Spiliotopoulos wrote: >>> 2.) With the 2" spacer lift, would I have to drop the t-case or do >>> any other mods besides slapping it on? >> >> Yes. >> >> You have to turn the rear axle forward, so that the pinion axis is almost >> parallel (a bit lower) to the transfer case output shaft. Or drop the >> transfer case 1/2 inch. Turning the rear axle forward will cost more if >> you have a shop do it for you (requires either adjustable lower arms, or >> elongating the upper arms rear mounting holes and installing an eccentric >> washer to set the pinion angle). You may not be sensitive enough to feel >> the vibes, but even with 1 inch lift, the pinion angle gets misaligned, >> increasing mechanical noise and u-joint wear. >> >> You also MUST rotate the front axle towards the rear to make the pinion >> axis parallel with the front driveshaft. >> This will restore the caster angle to factory specification, which is >> very important to limit the occurence of death wobble. The toe-in on the >> front axle must be set after the pinion angle is set for the front axle. >> >> The 2" spacer lift and 31" M/T tire combination is a very good >> combination. If you disconnect the front sway-bar the off-road capability >> of your rig will be dramatically increased compared to what it is right >> now. With the say-bar connected, your on-road behavior will not be much >> affected. >> This is a picture of a 2006 TJ with 2" spacer lift and 235R15 tires with >> the swaay-bar disconnected. >> http://alma-tech.com/tmp/tj_flex.jpg >> >> But you must find a shop that is willing to deal with all the "minor" >> details required to make the car run comfortable and safe as it was prior >> to the lift (fine tune the pinion angles). >> >> Bill Spiliotopoulos, >> '96 XJ >> '06 TJ. |
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