2 years ago I bought a 2000 dodge 4x4 2500 In two years I have been thru 2 transmissions in less than 30000 miles. I cannot get the truck to stop eratically shifting in all gears Also the 2 nd transmission was built by a "Performance Shop" In Leander Texas Also I have had to back to the mechanic 3 time and still not fixed the transmission only has about 4000 miles on it Now the shop will answer the phone or return my call for the past 2 weeks And now I am totally broke Any help would be great

 

This seems to be a common problem. they say to clean all of your battery connections, maybe do an Apps reset. There is also a wire from the alternator that people wrap in foil and seems to help. I can't remember But i'm sure someone will chime in.
Hope this helps.
P.S. go to user CP and fill in your signature so we know what you have.