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Gear Ratio Recommendations Tire Size Highway OEM Towing 31" to 33" 3.55 3.55 3.73 34" to 36" 3.73 4.11 4.56 37" to 39" 4.56 4.88 5.13 Tools: Gear Ratio Calculator / Engine RPM Calculator

Locker Recommendations Our favorite locker combination for the Ford F-150 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 a single selectable rear locker like the ARB Air Locker will still get your where you need to go.

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Ford F-150 (1997 - 2003)

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The following gears, lockers and install kits are available for 1997 to 2003 Ford F-150 with Ford 8.8" 28-Spline IFS front axles and Ford 8.8" or 9.75" rear axles. Between 2001 and 2003, some heavy duty versions of the F-150 came equipped with larger Ford 10.25" and 10.5" rear axles.

Front Axle: Ford 8.8" IFS 28 Spline (IFS) No Carrier Break Reverse Rotation Gears 3.31R 3.55R 3.73R 4.11R 4.56R 4.88R 5.13R Install Kits Master (All) Minor (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker

Rear Axle: Ford 8.8" (1997-2003) 31 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.27 3.31 3.55 3.73 4.11 4.30 4.56 4.88 5.13 5.71 Install Kits Master (All) Minor (All) Lockers OX Locker ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Rear Axle: Ford 9.75" (1997-1999) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.31 Install Kits Master 97-98 Master 1999 Minor (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker • 1997-1999 axles only fit 1997-2010 Ford 9.75" gears. Rear Axle: Ford 9.75" (2000-2003) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.31 Install Kits Master (OEM) Minor (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker • 1997-2010 Ford 9.75" gears fit OEM bearings and seals. Gears 3.31 § 3.55 § 3.73 § 4.11 § 4.56 § 4.88 § 5.13 § Install Kits Mstr. Conv. Kit § Lockers ARB Air Locker Eaton TrueTrac Detroit Locker § 2011+ Ford 9.75" gears require master conversion kit. *For F150 HD models with Ford 10.25" Semi-Float 7-Lug axle shafts, contact us.

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

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Ford F-150 (2004 - 2008)

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The following gears, lockers and install kits are available for 2004 to 2008 Ford F-150 with Ford 8.8" 28-Spline IFS front axles and Ford 8.8" or 9.75" rear axles. Some heavy duty versions of the F-150 came equipped with larger Ford 10.25" and 10.5" rear axles.

Front Axle: Ford 8.8" IFS 28 Spline (IFS) No Carrier Break Reverse Rotation Gears 3.31R 3.55R 3.73R 4.11R 4.56R 4.88R 5.13R Install Kits Master (All) Minor (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker

Rear Axle: Ford 8.8" (2004-2008) 31 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.27 3.31 3.55 3.73 4.11 4.30 4.56 4.88 5.13 5.71 Install Kits Master (All) Minor (All) Lockers OX Locker ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker Rear Axle: Ford 9.75" (2004-2007) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.31 Install Kits Master (OEM) Minor (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker • 1997-2010 Ford 9.75" gears fit OEM bearings and seals. Gears 3.31 § 3.55 § 3.73 § 4.11 § 4.56 § 4.88 § 5.13 § Install Kits Mstr. Conv. Kit § Lockers ARB Air Locker Eaton TrueTrac Detroit Locker § 2011+ Ford 9.75" gears require master conversion kit. Rear Axle: Ford 9.75" (2008) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.31 Install Kits Master (OEM) Minor (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker • 1997-2010 Ford 9.75" gears fit OEM bearings and seals. Gears 3.31 § 3.55 § 3.73 § 4.11 § 4.56 § 4.88 § 5.13 § Install Kits Mstr. Conv. Kit § Lockers ARB Air Locker Eaton TrueTrac Detroit Locker § 2011+ Ford 9.75" gears require master conversion kit. *For F150 HD models with Ford 10.25" Semi-Float 7-Lug axle shafts, contact us.

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

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Ford F-150 (2009 - 2014) / Ford Raptor (2010 - 2014)

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The following gears, lockers and install kits are available for 2009 to 2014 Ford F-150 with Ford 8.8" 31 Spline IFS front axles and Ford 8.8" or 9.75" rear axles. Some heavy duty versions of the F-150 came equipped with larger Ford 10.25" and 10.5" rear axles.

Front Axle: Ford 8.8" IFS 31 Spline (IFS) No Carrier Break Reverse Rotation Gears 3.31R 3.55R 3.73R 4.11R 4.56R 4.88R 5.13R Install Kits Master (All) Minor (All) Lockers ARB Air Locker Eaton E-Locker Detroit Locker

Rear Axle: Ford 8.8" (2009-2013) 31 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.27 3.31 3.55 3.73 4.11 4.30 4.56 4.88 5.13 5.71 Install Kits Mstr. (2010+)* Mstr. (2009)* Minor (All) Lockers OX Locker ARB Air Locker Eaton E-Locker Eaton TrueTrac Detroit Locker * 2010 and newer F-150s use 3.544" inner pinion bearings. * 2009 and older F-150s use 3.250" inner pinion bearings. Rear Axle: Ford 9.75" (2008-2010) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.08 3.31 Install Kits Master (OEM) Minor (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker • 1997-2010 Ford 9.75" gears fit OEM bearings and seals. Gears 3.31 § 3.55 § 3.73 § 4.11 § 4.56 § 4.88 § 5.13 § Install Kits Mstr. Conv. Kit § Lockers ARB Air Locker Eaton TrueTrac Detroit Locker § 2011+ Ford 9.75" gears require master conversion kit. Rear Axle: Ford 9.75" (2011-2014 F-150 / 2010-2011 Raptor) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.31 3.55 3.73 4.11 4.56 4.88 5.13 Install Kits Master (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker Rear Axle: Ford 9.75" (2012-2014 Raptor Only) 35 Spline Standard Rotation Raptor Only Gears 3.31 3.55 3.73 4.11 4.56 4.88 5.13 Install Kits Master (All) Lockers *For F150 HD models with Ford 10.25" Semi-Float 7-Lug axles shaft, contact us.

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

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Ford F-150 (2015 - Current) / Ford Raptor (2017 - Current)

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The following gears, lockers and install kits are available for 2015 and newer Ford F-150 with Ford 8.8" 31 Spline IFS front axles and the new Ford "Super" 8.8" or classic Ford 9.75" rear axles.

Front Axle: Ford 8.8" IFS 31 Spline (IFS) No Carrier Break Reverse Rotation Gears 3.31R 3.55R 3.73R 4.11R 4.56R 4.88R 5.13R Install Kits Master (All) Minor (All) Lockers ARB Air Locker Eaton E-Locker Detroit Locker

Rear Axle: Ford 8.8" (2015+) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.55 3.73 4.11 4.56 4.88 Install Kits Master (ALL) Lockers *Aftermarket lockers coming soon. Rear Axle: Ford 9.75" (2015+) 34 Spline C-Clip No Carrier Break Standard Rotation Gears 3.31 3.55 3.73 4.11 4.56 4.88 5.13 Install Kits Master (All) Lockers ARB Air Locker Eaton TrueTrac Detroit Locker Rear Axle: Ford 9.75" (2017+ Raptor Only) 35 Spline Standard Rotation Raptor Only Gears 3.31 3.55 3.73 4.11 4.56 4.88 5.13 Install Kits Master (All) Lockers

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

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