904 is driving me to insanity....

thanks guys. this is why i love this place. ive heard about type f, B&M quickshift fluid is type F. I dug into my old repair manuals from the late 70s again, whats the chances the rear clutch is worn out? only used in all forward gears, i neglected to mention that from a dig, if I hammer down the trans will shudder. i thought originally it was the rear leafs wrapping up and my itty bitty 13's wheel-hopping. went to a parking lot and did a bunch of launches with 2 of my friends on either side watching and they said neither one of em saw wheel hop. the engine doesnt have enough nuts to slip it into third but worn clutches and piston seals would make sense to me. thats the ONLY thing i havent messed with.