Vibration at High Speeds
03-31-2015, 09:36 AM
#1
Teching In
Thread Starter
Join Date: Mar 2013
Posts: 40
Likes: 0
Received 0 Likes
on
0 Posts
Vibration at High Speeds 99 Formula - moser 12 bolt / 4l80e
I've changed the ring and pinion, bearings backing plate and axles. The u-joint and yoke are good. The driveshaft is balanced. The trans is rebuilt.
The car vibrates (quite violently) at speeds of 75 / 80 +. What could it be? Please help. Thank you
I've changed the ring and pinion, bearings backing plate and axles. The u-joint and yoke are good. The driveshaft is balanced. The trans is rebuilt.
The car vibrates (quite violently) at speeds of 75 / 80 +. What could it be? Please help. Thank you
03-31-2015, 11:40 AM
#2
Launching!
Join Date: Aug 2011
Location: Memphis
Posts: 222
Likes: 0
Received 0 Likes
on
0 Posts
Wheels might not be balanced properly. Especially since it only happens at higher speeds. Did you get new tires recently? I got new tires at walmart for my other car and they didnt balance them properly and i had vibrations at 65mph plus. Good luck.
04-20-2015, 05:03 AM
#4
Teching In
Join Date: Apr 2015
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Just a thought, but measure your suspension geometry. My car is getting new UMI LCAs and panhard after realizing my rear end was sitting forward by almost a 1/4 inch as compared to the driver side. The LCA on that side was bent from previous owner jacking the car there and it was causing a really bad vibration at speeds above 75mph. Also have your driveshaft balanced.