re-gear $$, fuel mileage
#11
Here's a speed graph that I came up with. X axis is RPM bundle (1000-3000 in 200 RPM steps), Y axis is speed in MPH.
This is based on the 42RE- 2.74, 1.54, 1.00, and .69, with my tire (265/70-16). The bottom dot cluster is 1st gear of each RPM pack, the second cluster is 2nd gear, ect.
Right now, 60 MPH is ~1600 RPM. 3.92 would make this ~1750, and 4.11 would make it ~1900.
70 MPH is ~1900, 3.92 would make it 2050, 4.11 would make it 2200.
It's pretty safe to say, that 4.11's are worth about 10mph at highway speed. I'm thinking that I might as well get the 4.11's.
This is based on the 42RE- 2.74, 1.54, 1.00, and .69, with my tire (265/70-16). The bottom dot cluster is 1st gear of each RPM pack, the second cluster is 2nd gear, ect.
Right now, 60 MPH is ~1600 RPM. 3.92 would make this ~1750, and 4.11 would make it ~1900.
70 MPH is ~1900, 3.92 would make it 2050, 4.11 would make it 2200.
It's pretty safe to say, that 4.11's are worth about 10mph at highway speed. I'm thinking that I might as well get the 4.11's.
Last edited by magnethead; 08-01-2010 at 10:41 PM.