'81 Trans Am... pretty much all stock.
A year or so ago, at an Atlanta Motorplex autocross, I had an issue where I'd lost a couple quarts of trans fluid. Car never shifted oddly or badly during the whole day.... only noticed it low when I tried to leave the next morning. No issues since and no low fluid levels.
Fast forward to today. I rounded a sharp curve where I was in low 1. Car never shifted into 2nd when put in drive, but when I let off the throttle, the car coasted as if it was in neutral... no engine braking at all. Hmmmm......?
If I down shift into 1st, manually, and decelerate, it has engine braking..... but not in drive.
I was 20 miles from home, and I could accelerate to about 40 mph and "coast" simply by letting off the gas, as there were no engine braking whatsoever. I made it home fine, took me over an hour..... but I'm stumped as what to check.
Fluid level is fine... hot.
Any ideas?