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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 Gear Ratio Calculator Engine RPM Calculator

Locker Recommendations Ford F-150 series trucks feature a front IFS differential and a solid rear axle. For improved front traction we recommend an Eaton TrueTrac and for the rear, we highly recommend the Eaton TrueTrac for most applications or an Eaton E-Locker for extreme off-road use.

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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 an optional, but rare 7-lug Ford 10.5" rear axles.

Front: Ford 8.8" IFS 28 Spline (IFS) No Carrier Break Reverse Rotation Eaton TrueTrac

Rear: Ford 8.8" (1997-2003) 31 Spline C-Clip No Carrier Break Standard Rotation OX Locker Eaton TrueTrac Rear: Ford 9.75" (1997-1999) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac 97-99 axles require 97-10 spec gears. 97-98 axles use specific bearing and seals. 99 axles use specific bearings and seals. Rear: Ford 9.75" (2000-2003) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac 97-10 spec gears fit OEM bearings and seals. Uses 00-07 axle specific bearings and seals 11+ spec gears fit with bearing conversion kit. Rear: Ford 10.5" (2001-2003) F-150 HD Models Only 7-Lug Axles

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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 an optional, but rare Ford 10.5" rear axles.

Front: Ford 8.8" IFS 28 Spline (IFS) No Carrier Break Reverse Rotation Eaton TrueTrac

Rear: Ford 8.8" (2004-2008) 31 Spline C-Clip No Carrier Break Standard Rotation OX Locker Eaton TrueTrac Rear: Ford 9.75" (2004-2007) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac 97-10 spec gears fit OEM bearings and seals. 11+ spec gears fit with bearing conversion kit. Rear Axle: Ford 9.75" (2008) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac 97-10 spec gears fit OEM bearings and seals. 11+ spec gears fit with bearing conversion kit. Uses 08-10 axle specific bearings and seals. Rear: Ford 10.5" F-150 HD Models Only

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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.

Front: Ford 8.8" IFS 31 Spline (IFS) No Carrier Break Reverse Rotation Eaton TrueTrac

Rear: Ford 8.8" (2009-2013) 31 Spline C-Clip No Carrier Break Standard Rotation OX Locker Eaton TrueTrac 99-09 axles use 3.250" inner pinion bearings. 2010+ trucks use 3.544" inner pinion bearings. Rear: Ford 9.75" (2008-2010) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac 97-10 spec gears fit OEM bearings and seals. 11+ spec gears fit with bearing conversion kit. Uses 08-10 axle specific bearings and seals. Rear: Ford 9.75" (2011-2014 F-150) (2010-2011 Raptor) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac Uses 2011+ axle specific bearings and seals. Uses 2011+ axle specific gears. Rear Axle: Ford 9.75" (2012-2014 Raptor) 35 Spline Standard Rotation Raptor Only

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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: Ford 8.8" IFS 31 Spline (IFS) No Carrier Break Reverse Rotation Eaton TrueTrac

Rear: Ford 8.8" (2015+) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac Rear: Ford 9.75" (2015+) 34 Spline C-Clip No Carrier Break Standard Rotation Eaton TrueTrac Rear: Ford 9.75" (2017+ Raptor) 35 Spline Standard Rotation Raptor Only