My car used to hit potholes and and the back of my car would skake a lot. The shocks are perfectly fine I replaced the transmission mount, it needed it, and this helped a lot. Now it only happens every once and while. If I put in an alunimum driveshaft will this solve the problem? If this does not help what should I try?

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Mike Kenny
Current: 1991 RS 305 TBI
Past: 1990 RS 305 TBI (A woman forgot what red lights are for)
Current: mostly stock - newer 305 w/ 12,000 on it
Eclipse speakers all around w/ 10" tube powered by a Alpine V12 in back
K&N filter w/XStream flow lid - It is sweet!!
Future: 2" Cowl hood

 

Did you ever replace the rear sway bar bushings and links? If they are worn, the rear gets real sloppy...

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89 Firebird Formula
ZZ4 Crate, WS6 package, 9 bolt rear, Hotchiss and Lakewood suspension
Edelbrock TES Headers, Random Tech 3" cat, SLP exhaust...

 

Nope, how much will this cost me?

 

What condition are your Lower Control Arm bushings? It sounds like it could be those. Also replace the panhard bar busnings while you are at it. The aluminum driveshaft won't cure this condition IMO.