2002 Dodge Ram 2500 Base 8 Cyl 5.90L
Transmissions & Drivetrains
2nd and 3rd gear only with p0748
2002 Dodge Ram 2500 4x4 46re transmission, 5.9l V8 gas. Initial problem was clunking and shift problems in 1st and 2nd gear. p code p0748 came up. Dodge dealer replaced governor pressure solenoid. The shift problem cleared. Then p0740 appeared shortly after and I replaced the harness/overdrive solenoid/converter clutch solenoid myself. The 0740 code disappeared. Now I still have 0748 but the transmission only has 2nd and 3rd gear. It has 1st gear if I manually put in 1st. Will not shift into 4th gear. However if I clear the code with an OBDII reader, the transmission then works NORMALLY. It will start off in 1st gear, go to 2nd, 3rd, and then 4th. Within 2 minutes the check engine light reappears and the 0748 code returns and the truck then only has 2nd, and 3rd. If I erase the error code again it drives normally for two minutes before the check engine light and 0748 code returns and I lose 1st and 4th. From this it seems the transmission is actually normal but something overrides.
What repairs can fix the P0748 code?