Dirtman
Former Middleweight Moss Fighting Champion
- Joined
- May 28, 2018
- Messages
- 19,304
- Reaction score
- 13,327
- Points
- 113
- Location
- 41N 75W
- Vehicle Year
- 2009
- Engine Type
- 2.3 (4 Cylinder)
- Transmission
- Automatic
- 2WD / 4WD
- 2WD
- Total Lift
- It's up there.
- Total Drop
- It's down there.
- Tire Size
- Round.
- My credo
- I poop in the furnace.
This is an ongoing issue so bare with the long story.
About 6 months ago my OD light started flashing for about 10 seconds and went away. Read the pending code (P0750) shift solenoid A malfunction. The transmission did not change in any way. Still shifted excellent even at the time it was flashing.
I ignored it until it did it again in about 150 miles. Same thing, came on breifly stored a pending code but the transmission did not fail or change in any way. This time I figured I wanted to put in a shift kit anyway, ill drop the valve body and change the solenoid. I installed the shift kit, new valve body gasket, sonnax valves and o-ringed end plugs, new solenoid, new reverse servo gasket. All the internal solenoid wiring looked perfect.
Once all back together it drove great, the kit really firmed up the shifts and made the trans engage much quicker. But after 300 miles the damn light started flashing again.
This time I reset the computer and started looking at external wiring. I could find no problems in the wiring harness but the connection was a little dirty and the gasket was a tad dried up so I thoroughly cleaned it and coated the gasket with dielectric grease and the problem went away for another 150 miles.
Today bam... Back on again for 10 seconds then went away. This time it came back 5 minutes later and actually set off the check engine light. Same code P0750.
Freeze frame is always the same vehicle speed about 20 mph rpms about 2,000. And ZERO problems shifting.
Truck is an 09 regular cab 2wd 2.3 auto 5r44e with 66,000 miles. Fluid and filter is changed regularly, very clean. Also has an secondary trans cooler. Again there are NO physical symptoms associated with this code. The transmission drives great, doesnt go into limp mode and if the light wasnt on you would never know there was a problem.
What in the $&@%$&$& anyone got any ideas where to start chasing this problem again? Seems like I can just reset the computer and get another 150-300 miles before it will come back so I've been thinking this could be a ECU/software issue but no idea? With no physical issues it just seems logical it has to be a computer or electrical problem. If the solenoid, valve, or anythjng mechanical was failing i would assume it would stop shifting properly!
About 6 months ago my OD light started flashing for about 10 seconds and went away. Read the pending code (P0750) shift solenoid A malfunction. The transmission did not change in any way. Still shifted excellent even at the time it was flashing.
I ignored it until it did it again in about 150 miles. Same thing, came on breifly stored a pending code but the transmission did not fail or change in any way. This time I figured I wanted to put in a shift kit anyway, ill drop the valve body and change the solenoid. I installed the shift kit, new valve body gasket, sonnax valves and o-ringed end plugs, new solenoid, new reverse servo gasket. All the internal solenoid wiring looked perfect.
Once all back together it drove great, the kit really firmed up the shifts and made the trans engage much quicker. But after 300 miles the damn light started flashing again.
This time I reset the computer and started looking at external wiring. I could find no problems in the wiring harness but the connection was a little dirty and the gasket was a tad dried up so I thoroughly cleaned it and coated the gasket with dielectric grease and the problem went away for another 150 miles.
Today bam... Back on again for 10 seconds then went away. This time it came back 5 minutes later and actually set off the check engine light. Same code P0750.
Freeze frame is always the same vehicle speed about 20 mph rpms about 2,000. And ZERO problems shifting.
Truck is an 09 regular cab 2wd 2.3 auto 5r44e with 66,000 miles. Fluid and filter is changed regularly, very clean. Also has an secondary trans cooler. Again there are NO physical symptoms associated with this code. The transmission drives great, doesnt go into limp mode and if the light wasnt on you would never know there was a problem.
What in the $&@%$&$& anyone got any ideas where to start chasing this problem again? Seems like I can just reset the computer and get another 150-300 miles before it will come back so I've been thinking this could be a ECU/software issue but no idea? With no physical issues it just seems logical it has to be a computer or electrical problem. If the solenoid, valve, or anythjng mechanical was failing i would assume it would stop shifting properly!