Join Date: May 2008
Thanked 3 Times in 3 Posts
iTrader Score: 0 reviews
With 3.73s, it will take 10% more torque to turn the pinion gear, which means you'll be putting 10% more stress on your transmission, U-joints, etc.
To make up for that, you'll lower your rpms by 10% which should put you into a better rpm range to make power and will almost certainly help your highway mileage.
I went from 4.10s to 3.55s (a 15% change) and couldn't be happier. I haven't pulled any really heavy loads with the new gears, but my rpms at 65 dropped from 2100 to 1800 where the engine seems to work the best. At 75, the truck runs at 2100 now instead of 2250 where it was right on the edge of falling on it's face. My mileage at 65 went from 18 to 24.
You just have to ask yourself whether it's worth losing 10% of your power and putting 10% more stress on your drivetrain to drop your rpms by 10%.
95' Club Cab, 4WD, auto with TC/VB upgrades, 3.55s, BHAF, and a little extra fuel