Bad vibration

[91sonoma]

I lowered my 91sonoma 2" front with spindles and 3"in the rear with springs. Now I have a bad vibration while driving down the highway. It starts about 50mph. I seen on JTR website about a 3/4 inch transmission spacer and 3 degree shims and this will take care of the problem. Has anyone had this problem and used these parts and do they work? Any help would be great because I hate to drive my truck because of the vibration.

[Big Mack Daddy]

Shims should take care of your problem, not sure on the spacer.

[12sws27]

I had the problem on my Blazer with 3/3 drop (coils/leafs) Mine was just under hard acceleration though and the JTR alignment kit put an end to it. You might have a different problem other then drive-shaft or pinion alignment.

[Blaze_x]

Do you have a one or two piece drive shaft. What cab size/bed? The spacer works well to help the front ujoint line up. but if you have a two piece shaft you will need to raise the carrier/support bearing also. The 3* shims will help the rear u joint line up.

[91sonoma]

I have a single cab short bed 1 piece shaft. I put new u joints in and still have the vibration. Think i will get the shim kit from jtr and give it a try.

[Jongo88]

http://t1.gstatic.com/images?q=tbn:5ZShgYMQsmJ0ZM:http://image.moparmusclemagazine.com/f/techarticles/9266080+pinline_medium/0707_mopp_26_z+mopar_rearend_replacement+tapered_s hims.jpg (http://image.moparmusclemagazine.com/f/techarticles/9266080+pinline_medium/0707_mopp_26_z+mopar_rearend_replacement+tapered_s hims.jpg)