***I have resolved this issue***
I hope this thread might help others struggling with discovering the actual problem their vehicle is having. My issues started off with bad shifting, the speedo going crazy, the speedo also froze between shifts, I could go on and on about all the things it was doing. I was getting P0722 error codes, basically they car didn't know WHEN to shift so it was very difficult to drive at times. After a while turning the car off and letting it sit for 30 seconds or so and turning it back on really helped lessen the issues we saw. ( power cycled the computers ) Because of the P0722 error, I had the speed sensors replaced by a shop that said they thought that was the problem. WRONG. It did not fix the issue. I paid 1500 to replace the speed sensors as there are no external sensors on this car. The transmission has to be dropped out of the car to get to them. After spending about 200 at another shop, one that specialized in diagnostics ( they tried to help me out ) they determined the issue had to be the TCM.
I spent two weeks looking for the right replacement TCM. Found one out of a Jetta that was being parted out because the transmission failed and the owner didn't want to replace it. We replaced the TCM and I am happy to report this has resolved all the problems I was having.
I did not check the pins on the wires before I got the TCM. However - Replacing the TCM fixed my issues. We drove it after the replacement and immediately noticed when I put the car in reverse that the speedo began showing numbers ( before completely unresponsive in reverse ). Got on the main street and hit the accelerator - all gears perfect shifting and immediately went into 5th gear. Prior to the replacement we had no 5th gear and the shifting patterns were horrible intermittently. Drove it 10 miles and then went back and had the throttle position set, kick down set, and trans put in learning mode. All is well. My buddy noted that there were now codes stored in the ECU indicating that the TCM has been signaling intermittent faults. I am not sure when this happened because the last time I had it read, about a month or so ago, there were no TCM codes.
Car is absolutely perfect. Night and day from the moment we replaced the TCM this morning. The speedo also no longer freezes between shifts, where it did before. All's well that ends well I suppose. Better I only paid 150 than 780 the stealership wanted.
I already checked the DIYs and I don't see anything for this.
I also checked this previous forum post:
I am having the EXACT same issues. It is getting progressively worse.
What I noticed: When I allow the vehicle to warm all the way up 190 temp. I NEVER have any issues with it. I only got the PO722 code once.
Who I called: I spoke to a repair shop I trust and I do trust my dealer to an extent... Both said to check the 'wiring harness on the outside of the transmission' Does anyone know where this is? I had a coolant leak that might have corroded some of the connectors and they might just need to be cleaned, per the repair shop and the dealer.
ALSO: If you paid for this repair ( sensor replacement IN transmission ) what did you pay for it and who did you take it to?