Is Re-gearing worth it?
Hello all. My name is James. My wife and I just purchased a 2012 Coleman 274BH and we absolutely love it. It comes in at 4580 dry. Our TV is a very low mileage mint condition 2007 F150 with the 4.6...
Forum Discussion
jwco5.3 wrote:
Just more towing power. She really struggles to get up to speed due to the lack of power. It would also be nice when not towing. I'd like the truck to last and it seems the gearing will help remove strain from the Trans and engine... but then again the higher rpm for long periods of time may not be great on it. either.
The 07 4.6 makes peak hp at 4750 rpm and peak torque at 4000 rpm.
With the 3.55 at 4000 rpm your speed is approximately 65 mph in second gear and 36 mph in first.
With a 4.56 at 4000 rpm your speed is approximately 51 mph in second gear and 28 mph in first.
A 4.56 would be good to run on a 1/4 mile drag strip. But for normal driving and towing at speeds less than 65 mph and greater than 45 mph I doubt you will find much of an advantage with the 4.56.
Cruising at 75 without a trailer you will have a big hit on fuel economy with a 4.56.
To get what you want you need more horsepower not more gearing.
