Hello people. I am new to this forum and first would like to say this looks like a very informative, helpful site.
Now to my question--1982 trans am, 305 cross-fire injection, automatic transmission, odometer says 252? Miles. Car is pretty much original. 200 metric tranny, 2.93 or? 2.92 rear-end. Car is in very good shape (body, interior, and many, many parts are either new or rebuilt.) THE PROBLEM IS--when first accelerating from a complete stop, or when accelerator is pushed enough to cause a fairly hard downshift there is a loud knocking noise (and thud on the bottom of car feeling.) What I have found is that both front and rear u-joints are apparently slamming and gouging into the floorpan, l (not sure what you would call it, basically the metal on the bottom of the car.) For this to be happening apparently the whole driveshaft is RAISING a good 3 inches to make this happen. By looking at this it seems as if the rear of the transmission and the front of the rear differential must be lifting too--otherwise I do not see how this contact would be made? I can't imagine simply bad u-joints would cause this, but I am at a complete loss when it comes to what the problem is. ANY IDEAS ARE GREATLY APPRECIATED! THANK YOU VERY MUCH FOR ANY REPLIES!
Thursday, May 4th, 2006 AT 12:59 AM