Hello, Just looking for some thoughts on pulling hills with 3.42 gears. I'm going back to a pop-up TC @ 1800 lbs dry weight. The trucks I'm looking at are the Chevy and GMC 3500's SRW 4x4...
If the truck is rated to tow something like 16,000+lbs with a 3.42 ratio it can surely haul a <4000lb truck camper.
Gas engines need to run at higher RPMs to produce their power. It would not be unusual for a gas engine to be turning at 3500RPM, and they can run up to 5000RPM to produce maximum power.
A diesel is redlining at 3500RPM. Plus they produce their power at lower RPMs. This makes it practical to run a taller differential ratio like a 3.42, especially with the 10-speed transmission.