Computer died on 2003 Dakota 3.9 4wd 42re automatic, 2 new pcm from exchangecomputer.com threw many codes. Replaced all sensors still not shifting correctly and will not go over 40 miles per hour.
Are there any fixes for this? Cannot afford to keep spending money. 129,000 miles, engine runs great, good compression. South Louisiana

 

If you weren't getting those trans codes on the original computer, then it's the computer that is the problem.