A month ago I bought an 09 LMM (Stock powertrain, 6"lift, no tune, only 54k miles) and have been noticing that the trans had been shifting a bit rougher than the 01 dmx I had a while back. A few times while accelerating fairly hard from gears 3 to 4 the trans would hesitate and seemed like the truck would die then pick back up again, I chocked this up to be (in my inexperienced mind) the turbo spooling at the same time as the trans shifting causing a delay in shifting and turbo lag. The other day, I hit the pedal just a little too hard and the trans dropped into limp mode ultimately leaving me on the side of the road holding up traffic for a good half hour. The truck had no problem starting or revving but the trans would not shift at all out of park. I finally left the truck off as I called AAA to come get me and then tried it one last time, it worked and seemed to be running fine. I took the truck straight to vato-zone and they ran the code (the dreaded P0777, Solenoid B stuck in position) and they told me it was probably due to dirty fluid. With only 50k miles on it, I don't see how the fluid could be dirty enough to cause this type of problem. I was planning on putting EfiLive on the truck but will not do this in fear of the trans not being able to handle any more power. Which of the following fixes would you recommend I start with to keep myself on the road.
1. Flush the trans and change the fluid
2. Drop the pan, replace the solenoid, have GM come and re-calibrate the solenoid to the ECM
3. After only one time in limp mode, have I damaged c3 and c4 to the point that a shift kit or rebuild is the only option?
I appreciate the help and I will continue to search the forum for further information into my case. Cheers! :beer
1. Flush the trans and change the fluid
2. Drop the pan, replace the solenoid, have GM come and re-calibrate the solenoid to the ECM
3. After only one time in limp mode, have I damaged c3 and c4 to the point that a shift kit or rebuild is the only option?
I appreciate the help and I will continue to search the forum for further information into my case. Cheers! :beer