1st and 2nd vibrating erratically(T56)

So I take my Trans Am out for it's first drive of the year, and I miss 3rd for 1st.:rolleyes: It didn't go in all the way, I still had my foot on the clutch somewhat.

Now when the car is in 1st and 2nd gear it will vibrate more as you give it more throttle, it also tends to be harder to pull it out of gear the more throttle you give it. 3rd-6th drive fine I'd say.

Any suggestions?

It now does it in most every gear, only most pronounced in 1st and 2nd.

Mine just started doing the same thing. Did you ever find out what the problem was?