2008 Silverado 1500 4.3 with 4l60e codes P2769 and P0700

[mikem89]

I have a situation with a 2008 Silverado 4.3 with 4l60e behind it with 92k on it. Got p0700 and p2769 codes. Driving along and out of no where hard shifting starts. Did a entire new valvebody harness with new TCC solenoid as well as new filter and ATF. Seems to have made no difference and there is no consistency in when the hard shifting and code begins. Is there any further information on how this can be solved or a direction to go? At this point I feel it is safe to say it is not a harness short within the trans. I'm leaning toward a short in the chassis harness or the trans plug itself is not making a good connection because of cold temperature. I hate to throw parts at something without understanding what the actual issue is stemming from. Any help is appreciated.

[Patrick Thompson]

Same problem what was ur fix?

 

[mikem89]

I have not fixed this yet.  I wanted to revisit this because I had no issues with the truck for months.  We had our first few cold days of winter and the codes came back.  I'm wondering if its possible the TCM is the issue and it breaks connection either in the plug or internally when the temperature is cold enough.  Has anyone had a similar issue? Is it worth replacing the TCM?

[Kaisen Manuel]

I have also been having this issue. Did you ever get it fixed? I know its been a while since you last posted on this thread.

[BsAuto]

I've ran into this problem a couple of times dealing with customers vehicles. I know it sounds crazy but if you've already changed the harness and TCC and nothing changed, then I would say change the TPS sensor.. I know it sounds crazy but try and see if it fixes your issues. It's fixed more than not..