What trans does it have?

[79chevyk10]

Looking into buying a 01' Dodge Cummins 4x4 for a tow rig that has a full set of gauges and a banks power upgrade and a banks exhuast brake already on it.
How are the transmissions holding up on these and what model trans is it?
Not familiar with the Dodges but am interested in it due to the motor.

 

[79chevyk10]

Okay, I guess that it has a 47RE (been poking around towrig.com). Not quite an Allison but no POS huh? How will it hold up to the Banks package? It has 70k on it and the previous owner towed a big horse trailer with it.