1998xjspt

a friend of mine says ima really need them but im thinking i dont..are shims a must for any lift? im in the process of installing an RE3.5 and i dont want to buy shims if i dont have to

XJ-92

you might need them. they are only a few bucks. if you pay anything over 10 bucks for them, you are probably getting ripped off.

AndyB

Shims are for changing the pinion angle with an SYE. If you are not putting on an SYE, you don't need them.

XJDaniel

^What he said.

I used them on my RE 5.5 and it caused vibrations and didnt prevent them. Finish the lift and see if you have vibes to fix, but I highly doubt you will need them.

danXJ

no shims are used for both.

put the lift on, get an angle finder on the output of t case and the diff. I'm looking for a link to show this.

1998xjspt

whats an easy cheap way to find out the degree of shim that i need?

danXJ

angle finders are cheap. or your smartphone has a free ap. lol

1998xjspt

please show me where i can find them for less than $10!! i see them for 30 and 40

1998xjspt

what happens when you dont have degree shims but have an SYE?

Shivelyporsche

You wear out your lower ujoint and pinion bearing

HudsonN

A general rule of thumb is to get the shims that match with your lift.

2" lift - 2 degree shim
3" lift - 3 degree shim
4" lift - 4 degree shim.

1998xjspt

got the lift on, got vibes at 25-35 mph. so im doin the full SYE with a stock front 4.0 XJ driveshaft. was wondering though. could shims alone help get rid of the vibrations?? not sure if vibes ate coming cause of the slip yoke or rear pinion angle

danXJ

yes. shims will fix the pinion angle. but an SYE is worth it in the long run. you gonna do hack n tap since your using front driveshaft?

1998xjspt

mo, im doing stock 4.0 XJ front driveshaft with a full SYE from rugged ridge.. why cant i do a stock front xj d=shaft with a full sye??!

NatetheOgre

Shims should be used with or without an sye to correct pinion angles.

With an sye pinion should be pointed right at output shaft on t case, and without an sye the pinion and t case output should be parallel (from what I have read).

I used my front shaft in the rear of my jeep, and then went to the local jy and got another to replace my missing front. Cost me about 35 bucks. I am at about 6" of lift roughly. Should settle a bit lower.