I just placed a 3" spring lift on a '94 Wrangler. There is now a small vibration coming from underneath the vehicle. Noticing that the angle of the drive shaft has increased from the diff to the transfer case, I imagine that the axle has to be rotated. The problem is: It looks like the strut going from the axle to the frame would hamper this. What's the remedy? Thanks.
Well, first off.
Did you get a transfer case drop kit?
Spacers that will lower your X-fer case skid plate about 1"-1.5"
Also, do you see that there were any shims installed to help angle up your pinion?
Thanks for the reply, Cody. Neither one of those things were used. Wouldn't dropping the tail end of the transfer case 1 1/2" torque the engine up from it's mounts?
Cody is right. I'd just like to add that you need to do both. Drop the tcase and shim the rear axle.
Get some 2.5 degree shims from any 4x4 shop. New u-bolts are recommended, but not necessarily required. The spacer to drop the tcase can be made yourself if you don't want to buy one. Just get some square tube (approx 1"x1" 1/8" wall minimum) and cut two pieces as long as your skid plate. Drill and paint. Then get some bolts just like the existing tcase bolts but about 1" longer.
Pretty simple actually. The only hard part is getting the skid lined up and bolted in again. But for some damn reason, that's a pain even without a spacer. I recommend you do one side at a time. Just pull the bolts out on the opposite side all but the last few threads to hold up the skid while you work on the other side.
Just some info. - if you have a manual trans. - after dropping the transfer case you might have to trim the floor pan around the shifter. I didn't - now my trans has a new reverse gear and my floor pan is trimmed back.
I had the 2.5 degree shims in and the t-case drop kit before I did the SYE. Basically it sucked ***, but ok until I could save up and get around to doing the SYE.
The problem with lowering the palte was that the tranny would would jump out of second gear and the plate hung down which defeated the reason I lifted in the 1st place - ground clearance. I could have, but didn't feel like cutting the floor back, or bending the shift linkage.
With the SYE I have the plate up where it belongs and I have 8 degree shims to rotate the diff in line with the t-case.
I also have a buddy with a 3" lift and his plate up using the stock sfaft and a 6 degree shim.
Don't worry about diff starvation, the ring sprays enough oil to keep it cool, but it is a good idea to tilt the vehicle forward to fill it up.
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