I recently removed the Turbo 400 out of my Pontiac Firebird to replace a leaking torque converter seal. In the process I replaced the transmission filter while it was out. I reinstalled the transmission refilled and now have no gears, forward or reverse.
When disassembled, the pan was clean and the fluid clean and bright red. The torque converter is reinstalled correctly and engaged the lugs for the front pump. The filter was installed correctly and I dropped the pan again to reverify. The fluid is full to the correct level on the dipstick. The linkage is connected and moving properly.
Any ideas? Any help would be greatly appreciated!