Vibes even with my sye

[91xtrm4x4]

i have a 4.5 RE XD lift, AA HD SYE and Tom Wood Driveshaft, the shaft and sye are new, have had it 2 weeks. I get pretty bad vibes, feels like a massage chair at 50 mph, I have everything greased like it should be, and all bolts are tight. Also has new ujoints. What could be causeing my vibes. The only thing i could think of would maby be the tranny mount?? I really dont want to put the 1" drop back in, would kind of defeat the purpose of the sye and shaft. Any help would be great.
Thanks

[LeadFoot]

Might need some degree shims. Any pics of your driveshaft angle?

[MattPascoe]

:werd:

Did you rotate your pinion up?

There should be a 0* operating angle on the pinion side u-joint or you will get vibes.

http://www.4xshaft.com/images/cv_angle.gif

HTH

MP

[Josh]

I'd third the pinion angle as my first guess.

[heavyarms642]

i have your same setup. just installed it about a month ago. you definitly need degree shims, i installed 6's but i could use some 8's. i occasionally get vibes from 30-40 mph, no other vibes other than that range. hmm, would tire size affect the degree you need on the shims? ive got 35's, guess it might depend on your tire size.

[91xtrm4x4]

I have shims, but there the ones that come with the kit, i think there 2s, the angle doesnt look to bad, i will take a pic later on tonight and post it I probably just need bigger shims. Also, would a 1" motor mount help any?
Thanks

[Janster]

-=- originally posted by 91xtrm4x4 -=-
I have shims, but there the ones that come with the kit, i think there 2s, the angle doesnt look to bad, i will take a pic later on tonight and post it I probably just need bigger shims. Also, would a 1" motor mount help any?
Thanks

Nope...those shims that came with the kit won't work.

When I was running that set-up, I had 6 degree shims AND the transfer case drop.

8 degree shims might be a good place to start. Make sure you get STEAL shims - don't buy alluminum - they are too soft and flatten)