Originally Posted by emxmagnum
Also, unless it has an aftermarket gear set, I am pretty sure Dodge did not offer a 3.73 rearend it its trucks until the newest body style came out in 2003. The 94-2002 versions offered either a 3.55 or a 4.10. I may be mistaken about that, but it might be worth checkin out. Even with the low end grunt of the Cummins, 3.55's feel a little too "fast" for a heavy duty truck.
The 3.55s are a perfect gear ratio for a diesel, but a little high for a gas engine. Dodge has discontinued the 3.55s for 3.73s, but they are lower than needed. 4.10s are just too slow for any diesel, considering that 3.55s will provide as much power as needed and the 4.10s will accomplish little more than causing the motor to run at a higher rpm at highway speeds.