My wife has a 91 Caprice Classic w/LO3 (305) it is our third car. I plan on buying a vette soon and would be driving the Caprice during the winter. My first problem is it is shaking in between shifts. It first started between 45 and 55 mph but now does it in between all shifts, if I let off the gas a little it will shift and stop shaking. Car has 128,000 miles so what could be the problem, do I need a new tranny? Eventually I want the car to look like a bad ass Impala SS but that is years away and by then I'll want it to look like the 91 caprice classic it is LOL!