Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
Help with thump during acceleration...driveline???
Hey, I got the 87 GTA, all stock but a Hooker catback. It recently started making a weird thump when you accelerate from a stop. It ony does it at less then 10mph or from a stop. It sounds like something jerking and you feel a kick coming from under the car near the passenger side, like right under their arse. If you idle it and very very slowly roll onto the throttle it won't do it. But if you step on the throttle like even a quick tap it will do it. I've tried reverse, and doing a hard downshift but like I said it only does it from a stand still or right off the line. Any advice on what it could be would be awesome!! Thanks guys
__________________ 1987 GTA
Hooker Catback, CAI
Simple and stock....for now!
if its not the tranny mount (but it probably is) then it could be the motor mount on the passenger side, the way he described it under the passenger seat it could be the cat hitting the floor
j/k 
