L31MaxExpress
I'm Awesome
He said 2500 RPM at 63mph. I wanna say mine hits 2000 around 57. I have 4.10 and 225/75/16.
IMO that is perfect for towing a travel trailer. Less gear is going to make him get into the throttle more. Long period of open throttle will put the thing into PE. Say BYE to fuel mileage in PE.
I get 11 mpg towing at 65 mph with the 383 and 5.13s on LT265/75R16s. The 383 makes substantially more torque than a factory 454 even down at 2,500 rpm. Less rear gear and I would be downshifting for every hill.
I have towed the trailer with the Tahoe. 8.1/4L80E/3.42 gear and P305/50R20s. I lock the shifter into 3rd and roll. Even with the 8.1s torque the final OD ratio is too tall and it bogs the 8.1.