Sweet spot for 4.10 gears
I've got the bullet proof vest on, shields up and ready. If this has been asked countless times before, I apologize in advance. What is the sweet spot for towing if truck has 4.10 gears and diesel? Te...
Forum Discussion
When I was trying to decide on 3.55's or 4.10's a guy on the Ford forum figured out the different RPM's for the ratios and RPM's. Here it is.
4.10 DRW
4th gear 55 = 2764; 60 = 3015
5th gear 55 = 2061; 60 = 2248; 65 = 2435; 70 = 2622
6th gear 55 = 1624; 60 = 1772; 65 = 1919; 70 = 2067
Sweet spot for climbing: 64 - 75
3.55 DRW
4th gear 55 = 2393; 60 = 2610; 65 = 2828
5th gear 55 = 1784; 60 = 1946; 65 = 2108; 70 = 2271; 75 = 2433
6th gear 55 = 1406; 60 = 1534; 65 = 1662; 70 = 1790
Sweet spot for climbing: 55 - 64; > 74
He considered the sweet spot for climbing the big hills to be in the 2400 - 2800 RPM range.
I went with 4.10's and his figures appear right to me from my driving/towing experience.
4.10 DRW
4th gear 55 = 2764; 60 = 3015
5th gear 55 = 2061; 60 = 2248; 65 = 2435; 70 = 2622
6th gear 55 = 1624; 60 = 1772; 65 = 1919; 70 = 2067
Sweet spot for climbing: 64 - 75
3.55 DRW
4th gear 55 = 2393; 60 = 2610; 65 = 2828
5th gear 55 = 1784; 60 = 1946; 65 = 2108; 70 = 2271; 75 = 2433
6th gear 55 = 1406; 60 = 1534; 65 = 1662; 70 = 1790
Sweet spot for climbing: 55 - 64; > 74
He considered the sweet spot for climbing the big hills to be in the 2400 - 2800 RPM range.
I went with 4.10's and his figures appear right to me from my driving/towing experience.
