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Gear Ratio Recommendations Tire Size Highway OEM Towing 33" to 36" 3.55 3.73 4.11 37" to 39" 4.11 4.56 4.88 40" to 44" 4.56 4.88 5.13 Tools: Gear Ratio Calculator / Engine RPM Calculator

Locker Recommendations Our favorite locker combination for the Super Duty is an Eaton TrueTrac in the rear and a selectable locker like the ARB Air Locker or Eaton E-Locker up front. If you're on a budget, then the Spartan Locker also works well up front if your truck features automatic hubs.

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Ford F-250 / F-350 Super Duty (1999 - 2002) | Ford Excursion (2000 - 2005)

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The following gears, lockers and install kits are available for 1999 to 2002 Ford F-250 and F-350 Super Duty trucks and the 2000 to 2005 Ford Excursion with Dana 50 front axles and Ford Sterling 10.5" rear axles. Note: Ford 10.25" long pinion gears are also compatible with the Ford 10.5" axle when a Ford 10.25" master install kit is used.

Front Axle: Dana 50 30 Spline Full Float Axle Shafts No Carrier Break Reverse Rotation Gears 3.54R 3.73R 4.11R 4.30R 4.56R 4.88R 5.13R 5.38R Install Kits Master Minor Lockers ARB Air Locker Axle Shafts RCV Ultimate Chromoly CV Axle Shafts • '99-'02 Ford F-350 DRW (Dual Rear Wheel) trucks featured Dana 60 front axles. See '02-'07 parts below.

Rear Axle: Ford 10.5" 35 Spline Axle Shafts 31 Spline Pinion No Carrier Break Gears 3.55 3.73 4.11 4.30 4.56 4.88 5.13 † 5.38 † Install Kits Master (10.5) Minor (All) Master (10.25) † Lockers ARB Air Locker Detroit Locker Eaton TrueTrac OX Locker † Ford 10.25" gears require 10.25" master install kit. • F-350 models also used Dana 70 and Dana 80 axles.

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Ford F-250 / F-350 Super Duty (2002 - 2007)

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The following gears, lockers and install kits are available for 2002 to 2007 Ford F-250 and F-350 Super Duty trucks with Dana 60 front axles and Ford Sterling 10.5" rear axles. Note: Ford 10.25" long pinion gears are also compatible with the Ford 10.5" axle when a Ford 10.25" master install kit is used. 2005 and newer front Dana 60 axles use different axle shafts than the earlier axles.

Front Axle: Dana 60 35 Spline Full Float Axle Shafts 4.10/4.56 Carrier Break Reverse Rotation Gears 3.54R 3.73R 4.11R 4.30R(T) 4.56R(T) 4.88R(T) 5.13R(T) 5.38R(T) Install Kits Master (All) Minor (All) Lockers (4.10 - ) ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Ox Locker 4.88R* 5.38R* *For aftermarket 4.56+ carriers and lockers (T) Thick gears for 4.10- carriers and lockers Lockers (4.56 + ) ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Ox Locker Axle Shafts 2002-2004 RCV Ultimate Chromoly CV Axle Shafts 2005-2007 RCV Ultimate Chromoly CV Axle Shafts

Rear Axle: Ford 10.5" 35 Spline Full Float Axle Shafts 31 Spline Pinion No Carrier Break Gears 3.55 3.73 4.11 4.30 4.56 4.88 5.13 † 5.38 † Install Kits Master (10.5) Minor (All) Master (10.25) † Lockers ARB Air Locker Detroit Locker Eaton TrueTrac OX Locker † Ford 10.25" gears require 10.25" master install kit. • F-350 models also used Dana 80 rear axles. • 1999-2007 Ford 10.5" axle housings are identical to the earlier 1993-1998 Ford 10.25" axles so both 10.25" and 10.5" gears will fit as long as the matching bearings are used.

© Copyright Filthy Motorsports, DrivetrainShop.com - Do Not Copy or Reproduce Without Written Permission.

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Ford F-250 / F-350 Super Duty (2008 - 2010)

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The following gears, lockers and install kits are available for 2008 to 2010 Ford F-250 and F-350 Super Duty trucks with Dana 60 front axles and Ford Sterling 10.5" rear axles. Note: Ford 10.25" long pinion gears are also compatible with the Ford 10.5" axle when a Ford 10.25" master install kit is used.

Front Axle: Dana 60 35 Spline Full Float Axle Shafts 4.10/4.56 Carrier Break Reverse Rotation Gears 3.54R 3.73R 4.11R 4.30R(T) 4.56R(T) 4.88R(T) 5.13R(T) 5.38R(T) Install Kits Master (All) Minor (All) Lockers (4.10 - ) ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Ox Locker 4.88R* 5.38R* *For aftermarket 4.56+ carriers and lockers (T) Thick gears for 4.10- carriers and lockers Lockers (4.56 + ) ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Ox Locker Axle Shafts RCV Ultimate Chromoly CV Axle Shafts

Rear Axle: Ford 10.5" 35 Spline Full Float Axle Shafts 31 Spline Pinion No Carrier Break Gears 3.55 3.73 4.11 4.30 4.56 4.88 5.13 † 5.38 † Install Kits Master (10.5) Minor (10.25) † Master (10.25) † Lockers ARB Air Locker Detroit Locker Eaton TrueTrac OX Locker † Ford 10.25" gears require 10.25" master install kit. • F-350 models also used Dana 80 rear axles. • 2008-2010 Ford 10.5" axles use different bearings than the 2002-2006 Ford 10.5" axle, however, both 10.5" and 10.25" gears and lockers still fit when matched with the appropriate bearing kits.

© Copyright Filthy Motorsports, DrivetrainShop.com - Do Not Copy or Reproduce Without Written Permission.

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Ford F-250 / F-350 Super Duty (2011 - 2016)

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The following gears, lockers and install kits are available for 2011 to 2016 Ford F-250 and F-350 Super Duty trucks with Dana 60 front axles and Ford Sterling 10.5" rear axles.

Front Axle: Dana 60 35 Spline Full Float Axle Shafts 4.10/4.56 Carrier Break Reverse Rotation Gears 3.54R 3.73R 4.11R 4.30R(T) 4.56R(T) 4.88R(T) 5.13R(T) 5.38R(T) Install Kits Master (All) Minor (All) Lockers (4.10 - ) ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Ox Locker 4.88R* 5.38R* *For aftermarket 4.56+ carriers and lockers (T) Thick gears for 4.10- carriers and lockers Lockers (4.56 + ) ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Ox Locker Axle Shafts RCV Ultimate Chromoly CV Axle Shafts

Rear Axle: Ford 10.5" 35 Spline Full Float Axle Shafts 37 Spline Pinion No Carrier Break Gears 3.55 3.73 4.11 4.30 4.56 4.88 Install Kits Master (10.5) Lockers ARB Air Locker Detroit Locker Eaton TrueTrac OX Locker • F-350 models also use Dana 80 rear axles. • F-350 and F-250HD models also use M275 rear axles. • 2011 and newer Ford 10.5"/10.6" axles use different gears and bearings, however, differentials are interchangeable with earlier models.

© Copyright Filthy Motorsports, DrivetrainShop.com - Do Not Copy or Reproduce Without Written Permission.

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Ford F-250 / F-350 Super Duty (2017 +)

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The following gears, lockers and install kits are available for 2017 and newer Ford F-250 and F-350 Super Duty trucks with Dana 60 "Short" front axles and Ford Sterling 10.5" or M275 rear axles.

Front Axle: Dana 60 Short 28 Spline Pinion Reverse Rotation Gears OEM Only Install Kits Lockers (4.10 - )

Rear Axle: Ford 10.5" (F250 Models Only) 35 Spline Full Float Axle Shafts 37 Spline Pinion No Carrier Break Gears 3.55 3.73 4.11 4.30 4.56 4.88 Install Kits Master (10.5) Lockers ARB Air Locker Detroit Locker Eaton TrueTrac OX Locker Rear Axle: Dana M275 (F250HD and F350 Models) 36 Spline Full Float Axle Shafts 10.8" Ring Gear No Carrier Break Gears OEM Only Install Kits Lockers

© Copyright Filthy Motorsports, DrivetrainShop.com - Do Not Copy or Reproduce Without Written Permission.

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The Filthy Motorsports Drivetrain Shop 2008 Ford F-250 Super Duty 6.4L Diesel Shop Truck