Differential Gears??
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New User
Joined: Apr 2010
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Differential Gears??
I wanted to know if most or all SRW 7.3's came with the same differential gears. If so what are they. I have a 00' F250. With that in mind, I just installed 38.5's and wanted to know if changing those gears would increase my fuel mileage at all??
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Your F250 should have 3.73 gears. Getting new gears will help many things, but don't look for any huge improvements in MPG's. Have you re-calibrated your speedo yet? Incorrect settings will give you false odometer and speedometer readings so you can't calculate mileage.
