Post by
rb25drag »
https://forums.nicoclub.com/rb25drag-u76935.html
Mon Dec 31, 2007 3:35 am
Multiple things can cause Vibration on a high end pull.
It could range from tires out of balance, bad U-Joints in the drive shaft, bad axle bearings, Worped rotors, bad ring and pinion gear in the rear end, ETC.
First thing is start with the little stuff.
Have your tires checked, at 120MPH I hope you have good tires.
Second, check your U-Joints, Im sure they have never been greased, just crawl under the car move the drive shaft back and forth and make sure the u-joints are good and tight. Also with a bad U-Joint you will hear it pop every now and again.
Also make sure your bolts on the carrier bearing are tight, and the carrier bearing is in good condition.
Third jack up the car pull your wheels off and spin them around and wiggle the wheel back and forth top to bottom to make sure the wheel bearings are not bad.
and if all this checks out ok and it still vibrates bad you possible have something going bad in the rear end which is highly unlikely. I have not heard of anyone having problems out of it causing vibration on a 240 but in other vehicles I have seen this happen.
Hope this helps!!