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Filthy Motorsports: Store > Ford 9.75"
Ford 9.75" Axle Parts, Gears, and Upgrades

Axle Models:

Ford 9.75" - 34 Spline 1997-1998
Ford 9.75" - 34 Spline 1999
Ford 9.75" - 34 Spline 2000-2007
Ford 9.75" - 34 Spline 2008-2010
Ford 9.75" - 34 Spline 2011+
Ford 9.75" - 35 Spline 2012+ (Raptor)

Axle Specifications:

Ring Gear Diameter: 9.750
Diff Cover Bolts: 12
Ring Gear Bolts: 12
Axle Spline Count: 34
Axle Shaft Style: Semi-Float
C-Clips: Yes
Pinion Support: No
Pinion Nut: 1-1/8"
Pinion Crush Sleeve: Yes
Carrier Breaks: No
Dropout Carrier: No
Max Output Torque: 1,360 / 1,250 ft-lbs
Max Cont. Torque: 5,100 / 4,600 ft-lbs

Torque Specifications:

Pinion Preload New: 15 to 19 in-lbs
Pinion Preload Reused: 6 to 8 in-lbs
Ring Gear Backlash: .006" to .010"
Ring Gear Bolt Torque: 75 ft-lbs
Carrier Bearing Caps: 70 ft-lbs

Popular Applications:

Ford F-150 1997 to Current Rear
Ford F-150 Raptor
2010 to Current Rear
Ford Transit
2015 to Current Rear
Ford E Series Vans 1999 - 2014 Rear
Ford Expedition 1997 - 2014 Rear

Axle Images:




Due to various changes over the years, the following master install kits are required to install modern (2011+) Ford 9.75" gears into the following axle housings:

1997-1998 N/A
1999 N/A
2000-2007 YK F9.75-CNV-J
2008-2010 YK F9.75-CNV-K
2011+ YK F9.75-D

*Because all 9.75" axles look identical from the outside, the only way to determine the model year of a junkyard/sourced axle is to cross reference the pinion bearing and race part numbers.

Axle Details

The Ford 9.75" axle is a slightly smaller version of the Ford 10.25" / 10.5" Sterling axle and features a 9.75" diameter ring gear with 34 spline semi-floating axle shafts. While its bigger brother is found under full-size Ford trucks, the 9.75" model came as standard equipment under almost every modern Ford F-150 and '97 to '06 Expeditions. The ring and pinion gears changed in 2011, but will still fit older axles with the proper conversion bearings.
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Eaton Detroit TrueTrac
Ford 9.75" Eaton TrueTrac | 34 Spline
Price: $774.99
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Detroit Truetrac Lockers are maintenance free, fully mechanical, Torsen style limited slip differentials with helical gears instead of clutch packs (which wear out over time) to provide constant torque to both wheels while still allowing for smooth turns on pavement. more info
   
 
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