Need help; I have a92 full size Chevy Blazer. It has a manual transmission and when I am shiftinginto first, and from first to second there is a loud knocking sound andvibration that feel like it is right under the center console. However if I easeon the gas and baby it, there is no knocking. When I looked under the truck, were the frontof the shaft meets the rear of the transmission; I see marks above the shaft onthe sub frame. It seems as if the drive shaft (when I am applying to muchtorque form 1st and 2nd gear) is knocking against the subframe. And ive also just notice that the rear of the transmission is leakingbut it is not transmission fluid. Not sure what would cause that to happen? Anyhelp what so ever would be great!

 

Looks like rear bearing in trans has failed and caused lots of play.

 

How is the trans mount looking... From the looks of it the trans is shifting way to much when changing gears