I bought a set of ET street radials and the good news is they hook up but the bad news is that now everytime I shift there is a loud thud from either the rear or from underneath maybe around the tranny or something. Anyone know what this could be? It is loud from 1st to 2nd then softer 2nd to 3rd and slight 3rd to 4th. Thanks.

 

tranny mount may be broken??

 

I'd definitely check out the tranny mount, it sounds like the culprit.

 

TQ Arm mount?