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post #1 of (permalink) Old 09-03-2000, 10:58 PM Thread Starter
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Pinion angle and lift kit Question

I am ordering my 2.5" springs for my CJ-7 soon and was pondering the reason that all lift kits seem to come with degree wedges attached to the rear springs. I know this is to "correct" pinion angle on the lifted Jeep, but if the rear pinion and t-case yoke are supposed to be parallel to each other, and you are lifting the Jeep straight up, dont they remain parallel? If so, why the degree wedges? If not, then ...well...why not?

This isn't an emergency question, just an engineering one that I cant figure out. Thanks! (I know this is going to be a simple one and I'm gonna' look realy stupid, so please no flames...OK...please.)

Mike H.
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2000 Durango SLT

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post #2 of (permalink) Old 09-03-2000, 11:05 PM
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Re: Pinion angle and lift kit Question

Most 2.5" springs DON'T come with degree wedges. They shouldn't be necessary with that lift. I've had 2 different brand 2.5" kits in my Jeep, Rancho and Pro-comp, neither came with nor needed correction.

Brad
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post #3 of (permalink) Old 09-04-2000, 11:19 AM Thread Starter
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Re: Pinion angle and lift kit Question

OK, but the Skyjacker kit that we put on my bosses YJ (2") had wedges. I think they were something like 2 or 4 degrees.

Mike H.
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post #4 of (permalink) Old 09-04-2000, 06:29 PM
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Re: Pinion angle and lift kit Question

A GUESS: For those running a CV drive shaft. In that case you would have to rotate the axle toward the higher t/c output shaft, but I can see the reason for your question. If you raise the frame straight up, it does seem that the pinion and T/C output shaft would retain their parallelism. Parallel works with a U-joint at each end, but not a CV joint at one end.

Doug '97 TJ
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