I finally took my car to the shop to diagnos the growling sound I could hear when the car was moving. I thought it was rear wheel bearings or something from the rear end.

My mechanic said they could feel a vibration when they held the metal part of the shifter. They put it in the air with the engine running and in gear and went after it with a stethascope.

Apparently the sound is coming from the transmission. My mechanic said he will look for a used one but it will still cost a bundle (for me) to replace.

Does anyone have experience with this? Can I use heavier oil or an additive in the transmission? Should I go for a new transmission or find a used one?

Thanks for any advice.

Ray