Accord staying in 2nd gear
 

1996 Honda Accord DX 2.2 - only drives in 2nd gear (limp mode).

Did some major repairs. Engine work, new torque converter. Did not bleed the coolant. Ran okay at first. Believe the engine/tranmission got hot because there was air in the coolant. Some fluid came out on the ground, believe it was transmission fluid. Now it will not shift out of 2nd gear when driving it.

Tester set off error codes for Sylenoid B & speed sensor. The wiring was loose on sylenoid b, the speed sensor is brand new. Took it back, error codes went away but then it showed Transmission Range Sensor Circuit Malfunction 2-posi. Inspected it, and it looks fine, the car shifts into any gear, just won't shift when driving, no problems starting it up. Starts up in any gear but after you put the key in, you push a button to start it up. Does that make a difference? Should it not start up in any gear?

Any ideas what could be going on? Could the torque converter be faulty?