I have a 2010 Dodge Avenger SXT that I just purchased and I have the following codes p0882, p0700, p0456, p0845

SOURCE: limp mode?

It may have a "loss of prime" code that usually follows a service of the fluid and filter. After you're sure the fluid is full at operating temperature, disconnect the battery for a few minutes and reconnect to see if the code resets. I hope this helps.

SOURCE: 1997 Dodge Intrepid transmission slipping when warm

I was told to change my Transmission Control Module,located on the transmission . You can get it new for under $200 but, I was advised to get it from a junk yard it's alot cheaper and its easier. I hope this helps

SOURCE: 2005 dodge neon codes p0731, p0700, p0573 and p0720

The codes listed all point to the transmission being in bad shape or some wiring got crossed. Check with a trans shop for an estimate.

SOURCE: 2003 Chevy 2500HD 8.1 allison 4x4. Truck runs 100%

I have the same exact truck as you do and had a similar problem awhile ago when i installed the hypertech system. I had to uninstall the hypertech and then have a buddy (cause i did not know how) drain the residual power from the brain... apparenlty the brain houses a small amount of power and remembers these codes so after you turn off your truck...poof there they are again. This worked for me, but then I had other electrical problems so I the dealership had to replace the brain.

SOURCE: 97 cavalier starts and runs ok from a cold start after a few minutes of warm up it starts to run rough and miss. If i try to drive it it will start out ok but won't shift automaticly but shifts fine m

the shift solenoid sounds like the most likely cause of the shifting problem. when was the last tune up done on your cavalier?