Transmission OBD P0733 and P0734
On the way home from work today, I made an easy acceleration from a stop sign and had big problems when it should have shifted from 2nd to 3rd. It wouldn't shift up and just kept slipping. The tach swept from 2000 to about 2800 while it did this. I threw the automatic into "2" and even though it revved higher than I would like because of fuel prices, it steadied out. I only went another half mile and the engine light came on. I pulled over andhooked my trouble code reader up and it had two codes, P0733 and P0734. 733 is "Gear 3 Ratio Incorrect" and 734 is "Gear 4 Ratio Incorrect".
I only had a couple miles left to get back to the house at that point so I kept the shifter on 2nd and went home. I checked the xmsn fluid level before I shut down and it was in the "Hot" section of the dip stick like it should be. I have two questions about this. First, what causes gear 3 and 4 to suddenly forget their ratios after 15 minutes of driving? Second, how do I fix it? Can an aftermarket computer fix the ratio in a 45RFE?
'02 Dakota SLT Quad Cab, 4x4, 4.7