Anyone re-geared?
Cargo Master
Joined: Aug 2015
Posts: 2,400
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14.1, over the past 9500 miles. I posted it when it was 14.3 before my last big mountain tow.
That includes about 8% of the miles towing at 26K GCW and lower mileage the first few tank while the engine was breaking in and running winter fuel.
Towing, I typically get 8.5 - 10 (8.5 at 70+, 10 at 55-60), empty, I typically get 15.5.
That includes about 8% of the miles towing at 26K GCW and lower mileage the first few tank while the engine was breaking in and running winter fuel.
Towing, I typically get 8.5 - 10 (8.5 at 70+, 10 at 55-60), empty, I typically get 15.5.
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Junior User
Joined: Jan 2017
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Ok talked to west coast diffs and The gear shop. Both really nice and helpful (reasonable prices too). But I am being told there are currently no options to run 4.10?? They are saying 3.73 and 4.30 only. Anyone have any insight? Seems like 4.10 would be the sweet spot for the 6.7 and 37's..
Cargo Master
Joined: Aug 2015
Posts: 2,400
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The 4.30 feels great with my factory 31.9" tires on my F450. Surely a 4.30 isn't too much for 37's!
Senior User
Joined: Jul 2017
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I too wanted 4.10, but will probably go with 4.30. Ford Parts Unlimited have both front and rear 4.30 gears for $542 shipped...
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Junior User
Joined: Jan 2017
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I was told no - so I guess no current models are offered with the 4.10's? With the f250 axles anyway..
Good to hear!! It's my daily and I drive mostly city but it does go on long road trips unloaded (so 80mph) - I was worried about the rpm's being too high.
Good to hear!! It's my daily and I drive mostly city but it does go on long road trips unloaded (so 80mph) - I was worried about the rpm's being too high.
Fleet Mechanic
Joined: Sep 2016
Posts: 1,613
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4.10 is an option on a F350 dually. so the gears should be available for at least the bigger axle. I believe the F250 uses the same Sterling axle the Super Duty has had for years, so 4.10 should be available
Senior User
Joined: Jul 2017
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You need to be very careful about buying gears from previous year Super Dutys. On the 2017 250s they have a 35 spline axel shaft where previous year models with the same Dana 60 front and Sterling 10.5 rear, they used 31 an 37. If you want to play it safe I'd stick to the oem 3.73 or 4.30 35 spline gears.
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Senior User
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From: Kansas City
I was on the Ford parts website today looking up gears and the do have 4.10 gears for the front but not for the rear. Only 3.73 and 4.30 for the rear.
I too wanted 4.10, but will probably go with 4.30. Ford Parts Unlimited have both front and rear 4.30 gears for $542 shipped...
I too wanted 4.10, but will probably go with 4.30. Ford Parts Unlimited have both front and rear 4.30 gears for $542 shipped...
Senior User
Joined: Jul 2017
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What size tires did you input and what did you enter for your transmission ratio? I believe the ratio on the automatic is 0.67:1 in 6th gear...
Senior User
Joined: Apr 2017
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From: Kansas City
Apple's to Apple's it doesn't matter the the transmission or tire size as long as you compare 37s to 37s or 31s to 31s the final gear ratio is the only thing that changes
Mountain Pass
Joined: Feb 2017
Posts: 131
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Did you swap your gears yet? Was wondering if the 3.31 carrier is the same carrier used for the 3.55, 3.73 and 4.30's.
Roly
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