1990 Ford Bronco Q&A

1990 Ford Bronco Question: oil pressure & transmission

i have a new oil pump&oil sending unit i drive for about 15 min oil pressure drops between 5 to 10 psi what else need to be replaced? may transmisson runs fine fwd /rev but backing up one time transmission fluid came back up out the dip stick. -
Answer 1
As the oil heats up it gets thinner and pressure will be lower as the oil gets hot and about the transmission are you sure it wasn't overfull? -
Comment 1
no it wasnt even full it was a half quart low i checked 2 day before it happen. -