Leslie Moore
SDD Junior Member
I just finished a rebuild On my 01 7.3l 4R100 transmission. test drove it yesterday and transmission engages in all positions normally, however, it appears to be slipping in 1st gear. Once the truck reach about 15 mph, transmission works as normal and shifts through all gears. One other note, when shifting it is so soft that you can only tell by rpm change. Checked line pressure today and it was around 60 psi. in D. Any help would be greatly appreciated. Thank You.