[AMX guy]

I finally finished my '66 GTO , original tri-power engine, M20 transmission and rear end. all rebuilt .

Something is locking up, at low speed it can actually chirp the tires. I haven't had it on the road yet but around the parking lot it shifts poorly and binds up somewhere. it can be hard to get out of gear. when it binds up you can break it loose by forcing it with the engine. does it in both forward and reverse.

I jacked it up and ran it and it's weird, doesn't always do the same thing but sometimes when you try to shift from one gear to the next the wheels stop like you hit the brakes. sometimes they don't. the rear wheels do turn more that they should when idling in neutral.

I've checked all the fluid levels and I checked the linkage adjustment. if it was the brakes or real axle it seems like it wouldn't be hard to shift out of gear, the clutch seems fine. I'm thinking the transmission but how can it do this? I'm stumped