is this my transmission or my rear end whenever i start to take off it makes a loud grinding sound and the rpm's race real high and it finally catches it will continue to do that untill i am out of my lower gears. i have a 94 z28 auto. oh yea i just serviced my transmission and there was no shavings in it

 

Sounds like you're having a similar problem to me. I've got a slipping tranny on my 94Z28, A4. It makes grinding noises when I'm not soft on the throttle in 1st and another grinding when 2nd hits. If I have to drive the car I drive it very smooth so as not to agitate the transmission. What did you have done to your tranny? I was going to have my fluid drained and refilled but the previous owner didn't take care of it so well and I figured it was too late to drain the fluid and shavings which are the only things holding my transmission together right now.

 

we are having the exact same problem i have to drive mine the same way. but i did change the fluid and filter but there was no shavings and i also put some seafoam in but it didnt do anything.

 

on my 91rs with the 700r4, i had a grinding noise if i was hard on it... later on that day it got worse... then later on that evening it broke. was my flex plate. where it mounts to the crank it just spun around that...

 

I do believe my 3-4 clutch packs are gone too. I remember trying to drag race my buddy's 87 firebird and I wound up losing because my gears wouldn't catch until I bounced off the rev limiter. It was so embarassing losing to a third gen, but his car broke down later that night, we eventually got it going again, though. I figured it was better to face humiliation than have my transmission sitting in the middle of the road.