Driveline Angle

[Bart Reid]

I installed a 4" lift kit and need to adjust the rear drive shaft angle to reduce vibration. Are there any issues anyone knows about created by lowering the transfer case? Does it change engine angle enough to make a difference? Will the transfer case and tranny shifter linkage need to be modified? Would wedges to change rear end angle be a better choice? Any advice would be appreciated!

1990 Blazer, 4" lift 35" tires

 

[lamberthkp]

on a 4'' lift just lowering the transfer case should do the trick. i have a 6'' and i did that to my blazer and have no vibration. check u-joints if you still have vibration.

 

[bajaviking]

I lowered my transfer when I did my shackleflip and I have not had any issues with it but I still I think I would prefere the wedges to not loose height under the transfer.

 

[purplehavoc]

Just wondering how much you dropped your t-case?
Need to lower mine again.

 

[bajaviking]

I just moved the factory spacers to go between the frame and the crossmember. I guess it's about an inch.

 

[southernspeed]

It all depends on the lift you used really. If it was springs, blocks or flip.
Have a look at HADs website. There is a link to a really useful guide on pinion angle and UJ operating angles.
Get it wrong and at highway speeds you're in for a rattley ride!