Manual Tranny Problem
I searched this forum, but couldn't find a problem similar to mine, so here goes:
2001 ZX3 5spd - around 20k miles I changed the tranny fluid to TORCO synthetic. Car has driven great, until about 2 months ago. Just at throttle tip-in (I have the FC 65mm TB) the car "bucks " back & forth quite noticeably, in all gears, especially when using cruise control, going downhill - the computer will try to maintain speed right between no throttle and slight throttle tip-in. The car shakes back & forth badly. Car now has 50k on it.
Decided to change the fluid to regular Dexron ATF. As I drained the TORCO, it was dark grey with a silver streak, which of course is fine metal particles. I drives better now, but there is some damage done. When I had the car jacked up, and the tranny in 1st, I was able to move the tire about 45 degrees, which seems excessive.
So 2 questions. What is wrong with my tranny (I would guess differential), and what the hell good is synthetic fluid if this is the result?