Advice on 3.42 to 3.73 axle swap
08-16-2024, 08:12 AM
#21
Originally Posted by 505-Silverado
...I may have a 4l80 coming, with that the 3.73 will be about as low as I can go. .75 OD and 3.73 @75mph = 2500 rpm or so....
My truck with a 4l80 and 3.73 gears runs 2000 rpm at 65 mph. That's where I set my cruise because it seems to lose about 1 mpg just cruising at 70 mph. I rented some 2022 Yukon monstrosity with I think the 10 speed transmission. It cruised at about 1500 rpm at 70 mph.
That makes me want to get a Gear Vendors overdrive.
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505-Silverado (08-18-2024)
08-17-2024, 12:51 AM
#22
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505-Silverado (08-18-2024)
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