need help with my P38 transmission. my car stalls going up a hill and when i stop on a hill and take my foot off the brake it rolls back until i press on the gas pedal. is it normal for my 1995 P38 to do this or is my transmission bad? thank you.

 

when was the last time you checked or changed the fluid and filter in it?

 

actually my oil and filter was changed two years ago, but i planned on changing my motor and transmission oil this month due to the fact that my range have been overheating for the past few months and i just solved the problem by replacing the radiator with a new one. thanks.