Developed using Finite Element Analysis (FEA) to  withstand the demands of NASCAR racing. Finite Element Analysis is a method for  predicting the response of a geometric structure due to the environment it is being designed to  function in. The process starts by creating a geometric model. The model is then subdivided,  or meshed into many small geometric pieces, or elements of basic geometric shape.  These basic shapes can easily give results for stress and strain where the larger geometric  structure cannot Steel casting has nearly double the tensile and  yield strength and enlongation vs. cast iron Case investment cast from 8620 steel Bearing caps machined from 4130 steel ARP® bolts 3.250" differential bearing diameter

Kit includes 2 locks and 2 bolts to secure differential bearing adjusting nuts on 9"  nodular carriers produced after November 1989.

Sold in pkg. of 10 The most popular 9" ring gear bolt, for use on open differentials, Detroit Lockers and spools. NOTE: Will NOT fit Traction-Lok differentials.

Universal-design 3/4-20 hex flange pinion lock nut Fits 6.75", 7.5", 8.8" and 9" axle assemblies

Pinion bearing retainers are a direct fit and functional replacement for the C3AZ- 4614-B unit, which is no longer serviced by Ford Customer Service Division. Each comes complete with large rear cup (TBAA-4616-A) or (HM89410) and small front cup (B7A-4614-A) or (M88010). NOTE: Use large rear bearing TBAA-4621-A (HM-89443) and small front bearing B7A-4621-A (M-88048) with these retainers.

Pinion bearing retainers are a direct fit and functional replacement for the C3AZ- 4614-B unit, which is no longer serviced by Ford Customer Service Division. Each comes complete with large rear cup (TBAA-4616-A) or (HM89410) and small front cup (B7A-4614-A) or (M88010). NOTE: Use large rear bearing TBAA-4621-A (HM-89443) and small front bearing B7A-4621-A (M-88048) with these retainers

This premium Viton® oil seal was developed for high-speed, high-temperature applications by Dave Benda, Materials Control Supervisor, Ford Sterling Plant. Viton® is a registered trademark of Dupont Performance Elastomers.

Kit includes: pinion and carrier shims, crush sleeve, pinion seal, pinion nut, ring gear bolts and cover gasket Use for changing ring and pinion gear or differential Fits IRS

Includes everything that M-4210-A has and pinion gear and carrier bearings Use for changing ring and pinion gear or differential Fits IRS

Includes everything that M-4210-B has and axle shaft bearings and axle shaft seals Use for changing ring and pinion gear or differential Fits 1986-04 Mustang for non-IRS axles

8.8" axle shaft bearing and seal kit for non-IRS axles Kit contains 2 outer axle shaft bearings and seals .256" O.D. bearing Fits 1986-04 Mustang

For use in rebuild 8.8" IRS differentials Kit includes 2 stub shaft pilot bearings and 2 stub shaft pilot bearing housing seals

Kit consists of a hybrid 1310/1330 series cross, plus (4) 1.0625" OD and (2) 1.125" OD caps and locking clips Allows small and large Ford drivetrain components to be interchanged

Kit includes clutch pack, shims, friction modifier and instruction sheet Fits all 8.8" Traction-Lok differentials

Kit includes carbon fiber clutch pack, shims, S-spring and instruction sheet Fits all 8.8" Traction-Lok differentials Carbon fiber discs designed for higher torque  usage Used in 2003-08 SVT Mustangs

8.8" differential Features plate-type clutches Will accept anti-lock exciter ring Requires 4 ounces of CM-19546-A1 friction modifier with initial fill

8.8" differential Features plate-type clutches Will accept anti-lock exciter ring Requires 4 ounces of CM-19546-A1 friction modifier  with initial fill

8.8" differential Fits 31 spline axles Fits solid or independent rear suspension Carbon fiber clutch plates for increased durability Will accept anti-lock exciter ring Requires 4 ounces of CM-19546-A1 friction modifier with initial fill Original equipment in 2003-04 Mustang Cobra

8.8" differential Torsen T-2 type differential Features full-time torque-sensing, torque-biasing M-4204-T28 fits 1999 Cobra/Thunderbird/ Mark VII with IRS (2000-04 Cobra has 31 spline)

8.8" differential Torsen T-2 type differential Features full-time torque-sensing, torque-biasing M-4204-T28 fits 1999 Cobra/Thunderbird/ Mark VII with IRS (2000-04 Cobra has 31 spline)

7.5" differential Fits 28 spline axles Features plate-type clutches Will accept anti-lock exciter ring Requires 4 ounces of CM-19546-A1 friction modifier with initial fill

9" differential 28 spline 4-spring aggressive torque bias Street/strip application 1536 steel billet case caps Cast high-strength nodular iron case OEM profile gears made of high-manganese, high-chromium alloy steel Rebuildable

9" differential 31 spline 4-spring aggressive torque bias Street/strip application 1536 steel billet case caps Cast high-strength nodular iron case OEM profile gears made of high-manganese, high-chromium alloy steel Rebuildable

Low Profile design to fit 2005-08 Mustang GT and 2007-08 SVT Mustang Lightweight 356T6 aluminum casting replaces rear cover on 8.8" Load bolts provide additional support for differential bearing caps Increase ring and pinion gear life NOTE: Check exterior clearance to chassis/ suspension.

Specially formulated additive to provide smooth operation of clutch-type limited-slip  differentials.

Factory 8.8" axle housing kit for 2005-2010  Mustang Perfect for building a custom axle! Allows you to customize your gear set and  differential Includes: – Axle housing – Housing vent – Left and right 31-spline production axle  shafts – 2005-06 Mustang pinion flange – 2003-04 Cobra 1350 pinion flange – Cover bolts – Pinion washer – C-locks – M-4210-B ring and pinion installation kit – M-1126-C shim kit

2005-10 Mustang GT 8.8 axle assembly 31 spline axles and Traction-Lok differential 3.55 gear ratio Includes axle shafts

This kit consists of 2 bushings, 2 C-locks and 1 4-ounce bottle of friction modifier. These parts are included with every Ford Racing 8.8" axle assembly. Now available separately in this kit  in response to requests from racers and  fabricators.

Original equipment on 2003-04 Mustang Cobra Designed for use with 1350 U-joint flange 4.25" bolt circle Fits all 8.8" rear drive pinions

SEE SPEC SHEET 
MUSTANG/RANGER/F-150

SEE SPEC SHEET
MUSTANG/RANGER/F-150

SEE SPEC SHEET
MUSTANG/RANGER/F-150

SEE SPEC SHEET
MUSTANG/RANGER/F-150

SEE SPEC SHEET
MUSTANG/RANGER/F-150

SEE SPEC SHEET
MUSTANG/RANGER/F-150
 

5 x 4.5" bolt circle, 2.775" wheel pilot hub for popular Mustang size wheels Should be used with IRS knuckle M-5970-A Original equipment on 1999-04 Mustang Cobra

For use with kit car IRS hub M-1109-A Original equipment on 1993-98 Mark VIII, 1989-97 Thunderbird, and 1999-04 Cobra

Aluminum IRS differential housing, rear cover, rear cover bolts, oil slinger and vent tube Does not include gear set, gear installation kit or IRS compatible differential Original equipment on 1989-97 T-Bird, 1993-98 Mark VIII, 1999-04 Mustang Cobra with  8.8"

Knuckles for use in kit car IRS systems Hub not included! Use with M-1109-A. Sold separately Includes M-1215-A Original equipment on 1989-97 Thunderbird and 1993-98 Mark VIII