Is it worth regearing my tow rig?
I recently bought a new travel trailer and a used truck to use as the tow vehicle. When I bought the truck I was told it had a 3.73 rear diff... anyhow after some investigation it has the 3.42. That...
Forum Discussion
Groover wrote:
With a 4 speed transmission you could end up in a situation where with the new rear end you will get 2000rpm in 4th and 2800rpm in 3rd at highway speeds and neither one is really comfortable. You may want to evaluate that before making a decision. "Never downshifts unless it's a very steep hill. Acceleration is slow but acceptable." You may already be in your sweet spot.
That is exactly my concern.
I've run a few ratios through and get the following at 65mph.
3.42 - 3rd gear - 2450rpm
3.42 - 4th gear - 1700rpm
4.10 - 3rd gear - 2950rpm
4.10 - 4th gear - 1900rpm
4.56 - 3rd gear - 3250rpm
4.56 - 4th gear - 2300rpm
Seems like a 4.56 makes more sense as I may be able to use OD.
