1999 gmc sierra rear trans mount causing vibration when vehicle coasting preparing to stop>

1999 GMC C1500
130,000 MILES
Avatar
RGA
  • MEMBER
  • 1 POST
slight low frequency harmonic vibration when vehicle is not under power(coasting prior to braking) put on a known set of new oem gm wheels and tires. The condition was more noticible with the lighter tires and rims. Truck is clean,no leaks 4wd,z71. Checked cv joints u-joints, wheel bearings drive shaft nothing loose. Was there not a recall on rear trans mount early failure back in 2000? I had same truck in a Chevy new and about 17000 miles wierd harmonic vibration started.
Nov 10, 2011 at 9:17 PM
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
one other thing you can try is if your truck has tires that hold 80 psi lower the rear tires to 55psi. At least as long as the truck is empty sometimes this iscaused by that. even if there was a recall then it's to late for that type of thing and you would have to bear the cost. they are pretty easy to change,3 or 4 bolts hold them in depending on what type you have. cost for partis around $20
Nov 11, 2011 at 7:22 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle