its840
NAXJA Forum User
- Location
- Louisville Ky
how much can you lift the jeep before an axle shim is required?
how much can you lift the jeep before an axle shim is required?
For the scenario above, you're basically pooched if you go too high. You'll need a double cardan and shims.Spicer Recommends 3 degrees Maximum
Also notice the proper geometry is to have the transfer case output and axle exactly parallel
Same for mine before the 8.8, was running an 8.25 and a 2.5" w/ stock 'shaft it was fine. Upped the lift to RE's 4.5 (settled around 5.5 or so) and got some vibes. Threw in a 4* shim and all was good. Ended up putting an SYE and a new CV 'shaft in the rear and kept the shims (no adverse effects), although with the 8.8 I ditched them since I set the pinion angle via the perches....I had no problems with a 2" lift (very, very minor vibes), and at 5" had to use a 4 degree shim (this is on a 8.25)...
How do you figure?You won't need shims unless you install a SYE and a CV drive shaft (double cardan drive shaft).
IIRC it goes the other way around... Shim's and t-case drops are more of a temp fix until an SYE can be scrounged up. I know shims are recommended with an SYE depending on angles and such.You won't need shims unless you install a SYE and a CV drive shaft (double cardan drive shaft).
How do you figure?
Shims can *sometimes* be used to solve vibe issues when lifting but using the stock shaft. Either lift springs or lift shackles or both can cause you to need shims.
... I'm going to just set the perches at the angle I need (1-2 degrees below parallel with the driveshaft for an SYE setup) instead of using shims.