Highway RPM

[largewon62]

I have a 97 Yukon with 3.73 gears. and 33" tires. The carrier bearings decided to let go and I want to re-gear while I am in there. The 3.73's and 33" tires runs just under 1600 RPM at 60 mph and it seems to lug at the RPM.

I want to replace the G-bomb posi. I am thinking of replacing it with an Eaton posi
19559-010. What are your thoughts? I rarely go off road, except on the beach.


This is my work truck and I drive 30-50 miles hwy and about the 15-25 miles city every day. What highway RPM will give me the best fuel mileage?

 

[SunlitComet]

doing 4.10 gears will counter act the 33 tires from the oem 245/75/16 and it will actually run about 100-150 faster engine rpm. that is basically return to stock engine to tire rpm ratios.

 

[largewon62]

Thanks for the response. I was torn between the 4.10 and 4.30 since I carry 600 pounds of tools and my 300 pound ***.