Quote:
Originally Posted by Big Dave
Hey! Don't forget about me!
I swapped the R&P in the rear axle of my F-350. I went from a 3.73:1 (2000 RPM @ 70 MPH) to a 3.08:1 ratio (1700 RPM @ 70 MPH).
My MPG improved from 20 MPG to 23 MPG at the time. A 15% improvement in MPG is nothing to sneeze at.
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How hard was this, any pics? I've thought about it on my truck, but since it's a 4x4 I'd need something more like a 2 speed rear, one for normal, summer, econ, 2wd driving and one for before I engage the 4x4. I don't think it's possible for me to just buy a 2speed rear though or make one, so I guess I'll just not do that mod.
But I was curious of your experience.