lt1z350

So this was a random thing but now happens daily. Trans will just start shifting harder like setting max line but I have that **** off in tune and when it does that it also will bring in all shifts a few mph early and lock up will happen at 40 mph and I have it set to 55 mph. I have checked all vss signals even changed the ones in transfer case. I have a GM mdi2 so have looked at everything I can think of even logged every pid on hptuners looking for something weird but don't see anything obvious. It was a random thing like every couple months would do this and set a reduced power around same time. Since then new throttle body new gas pedal sensor and new tcm. I don't know what is left. When it happens I look at temp on dic and seems in line and normal. I also lost my rear lift gate when this became more daily maybe coincidence and now both back windows just quick working so getting some weird electrical issues all of a sudden. Just not sure what to do next. Ugh.

Wolftrk99

iTrader: (5)

Id start checking grounds, sounds like something going on electrically!

01ssreda4

iTrader: (87)

Bad maf can cause irratic trans issues as its a main sensor for the load calculation. A "bad" maf can cause the trans to go to full line pressure also.