[VetteTech81]

Re: similar vibes

My 94 conv has a vibration too, and its weird sometimes the car seems OK, just not like when I bought it, the mufflers sound louder (its got the power effects system on it).
tonight I took a ride and could hear the muffler rattling against the bottom somewhere . I am convinced its the transmission mount, I had downshifted the other day and felt like something broke , thats when the car sounded different , can even hear a whining noise
(probably my driveshaft getting chewed up by the crooked transmission). I'm not sure where the mount is but I'm sure if I jack the car up high enough I'll be able to change it myself.
Just mentioning this for you Bubblehead, someone suggested checking this and you never posted if you checked it yet.

The 94 doesn't have a traditional rubber trans mount. it has an aliuminum C beam that bolts to the tail shaft and tuns the lenght of the driveshaft and bolts to the diff. the exhaust and drive shaft have to be removed to remove the C beam

 

[Topman]

vettetech81,
thanks for telling me that , at least I know not to look for a rubber mount, what could possibly break loose during a downshift under the car, I guess I'll just have to get it on a lift and check everything.