Get a jasper brand transmission
www.jasperengines.com My dad has a 1995 Dodge Ram with the cummins diesel, we went through 4 transmissions, the last one we put in was a jasper brand one and haven't had an ounce of trouble. They have an awesome 3 year/75,000 mile warranty and if it fails they will pay a shop to install a new one. They have even called my dad a bunch of times to make sure he was happy, that is a company you can trust.