Hello trying to figure out my 2010 Dodge Charger 3.5 v6 with 42RLE transmission problem. Everything started when i accidentally hooked the battery wires backwards Alternator wire melted in two. Bunch of fuses blown. Got all that fixed but the transmission wont shift since then. It was stuck in 1st gear. Computer threw code P0750. Replaced the solenoid pack inside transmission and now its stuck in 2nd gear (limp mode) throwing the same code and nothing else. All fuses are good, i dont think the 2010 model had a transmission relay or not one i can see on the fuse box diagram. Wiring harness from trans to PCM seemingly ohmed out fine. Im lost at this point, what do i replace next? PCM?

 

I swear man, I did the exact same thing. Well, my idiot ex wanted to try and take my battery for his Land Rover and reconnected mine backwards. Replaced valve body, tested wiring, everything. Still getting p0750 as well. Took it to dealer. They say it's still a bad valve body. They're idiots.