Hello
I rebuilt the E40D gearbox ( new : discs, seal, sonnax center support, sprag ... )of a 1991 Bronco 5l and since I no longer have forward speed in drive, rpm do not move, it is as if I were in neutral.
Do you have any idea what the problem is?

Thank you in advance

 

Could be several things
Check the line pressure first

 

Thank you for your answer.
The pressures are good in all positions.