SRW for pulling Fifth Wheel
I am looking to buy a new truck because we intend to upgrade to a fifth wheel within the next few years. I have read a ton of articles and posts saying that a dually is better and the truck to have. P...
Forum Discussion
Hannibal wrote:ShinerBock wrote:
The math still does not add up. What rear gear did each truck have and at what speed did you pull these hills to get these rpms?
2003 SO Cummins Ram 47rfe/4.10. 2010 5.4L F250 5spd TS/3.73. 60~mph.
Yep, your rpm numbers don't add up according to the math of the gear ratios and speed you said you were going.
With a locked torque converter, your 2003 Ram is not at 2,900 rpm at 60 mph in either 2nd, 3rd, or 4th. At 60 mph, you would be at 3,700 rpm in 2nd, 2,600 rpm in 3rd, and 1,800 in 4th. The only way you would be at 2,900 rpm would be if you were going 65 mph in 3rd.
In your 2010 Ford, you would be at 4,980 rpm in 2nd, 3,500 rpm in 3rd, and 2,260 rpm in 4th. Unless your Ford didn't have its torque converter locked which if that were the case then you were not getting full engine horsepower.
