tjbushey

Hi guys, looking for some pointers on some Serious Vibrations ive gotten after i installed 2 1/2 Rough country lift in my 98 Tacoma 4x4 . Never had vibrations before that i know of, and if it did they were hardly noticeable.. the vibrations im getting now are at low speeds and high way speeds. the low speed Vibration i can deal with but the Highway vibration is really annoying as i drive 3 hours a day to work. Vibrations usually start around 80km/hr and keep getting worse as speed climbs... vibration goes away for about 10 seconds then comes back for a good 30 seconds... keeps doing that over and over.vibrations felt in floor and truck seems to shake. Yes ive gotten an alignment but didnt change anything.

The lift consist of Coil spacers and Drop Shackles in the rear. Also have loud Squealing noise thats being there since ive bought the truck but seems to be getting worse... not sure if this has anything to do with the vibrations.

thanks any help would be awesome before i start throwing money at things

Chickenman

Did you put shims under the rear leafs to realign your pinion for correct drive shaft angle?

tjbushey

no i have not, ive read about something with shims But not sure if they would work with a Shackle drop or not, shackle drop raises the pinion Does it not? there for i would want to shim the pinion Down? Most topics ive read are to shim it up but those didnt have a shackle drop.

Chickenman

If you lift the truck up or down it changes the drive shaft angle and I bet that's part of the problem. 4crawler has a great write up on it.
http://www.4crawler.com/4x4/CheapTri...FixingProblems

Tim Steele

make sure you have your driveline clocked correctly.

CapeRustBucket

What was the conclusion to this? I got daystar shackles that replaced lift blocks.. now i have a takeoff vibration. Thinking about installing shims the opposite way as with blocks.