bad vibration when coasting over 90
bad vibration when coasting over 90 well, my dad told me about a vivbration he was having when he was doing over 90. so on my way back to college last night i decided to try it out. If im accelarating there's no vibration but when i let off the gas things start to vibrate bad, i feel like its coming through the transmission. Any ideas? 97 30th SS is the car.
Have you replaced the transmission mount at all?
If you have the energy suspension poly-mount, you might want to double-check that you didn't put the spacer in. If you did, take it out and it should get rid of the vibration.
If you have the stock mount, it might be on its way out. Get under the car and double check it.
If you have the energy suspension poly-mount, you might want to double-check that you didn't put the spacer in. If you did, take it out and it should get rid of the vibration.
If you have the stock mount, it might be on its way out. Get under the car and double check it.
Trending Topics
Teching In
Joined: Nov 2007
Posts: 2
Likes: 0
I had the same problem to, i took my car down to a speed shop, they tested it and said it was the driveshaft. They recommended buying a new driveshaft, so i did. I ended up buying a carbon fiber driveshaft from precision technologies. If i can remember right i think it was called the critical link. Eversince installing that on my car the vibration went away. and ended up saving a few pounds by switching from steel to carbon fiber. Hope this helps!!!
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
TECH Resident
Joined: Feb 2006
Posts: 934
Likes: 0
From: Panama City Florida
I had the same problem to, i took my car down to a speed shop, they tested it and said it was the driveshaft. They recommended buying a new driveshaft, so i did. I ended up buying a carbon fiber driveshaft from precision technologies. If i can remember right i think it was called the critical link. Eversince installing that on my car the vibration went away. and ended up saving a few pounds by switching from steel to carbon fiber. Hope this helps!!!
Try this...if you have had a gear change, try swapping the driveshaft 180 degrees at the rear yoke. I had a gear change and had the EXACT problem...I would vibrate at about 85+ MPH, but once I rotated the driveshaft 180 degrees in the rear yoke, problem solved!!
I bought my car (96 WS6) with 373's installed by a back-yard mechanic (wines a bit). It also vibrates a bit at higher speeds, so I bought and energy suspenion trans mount and what I thought was a ls1 aluminum DS (ebay seller lied about what the DS doesn't fit and I wasn't able to use it. I read a lot of threads about how the stock steel DS would vibrate quite a bit at higher speeds so I thought the new trans mount and aluminum DS would fix the problem. All I can say is the energy suspension mount only magnified the problem and when I go back from college for christmast break I'm going to install a new stock trans mount. My suggestion is to replace the trans mount with the OEM part and and buy an aluminum DS from a LS1 f-body....that should fix the vibration problems you're having.
