Differential Repair Kits | Ford

Sierra Gear Differential Repair & Installation Kits for Ford Axles

Differential Repair and Installation Kits from Sierra Gear and Axle are the most complete in the industry. We assemble each kit using only the highest quality components. Each of our kits are designed to ensure a trouble-free installation and long lasting performance. Several different kits are available for each application, each tailored for the type of differential repair being performed. Whether you’re doing a complete differential repair, differential gear ratio change, budget rebuild or pinion bearing replacement, we have got the ideal kit for you.

Axle Bearing and Seal Kits can be found here

A description of each kit type and it’s contents is listed below the following application chart

Application Master Kit Bearing Kit Pinion Kit Mini Kit
7.5″ IK F7.5 BK F7.5 PK F7.5 MK F7.5
8″ IK F8 BK F8 PK F8 MK F8
8″ IRS BK F8IRS
8.8″ IK F8.8 BK F8.8 PK F8.8 MK F8.8
9″ ’70 & Up IK F9 BK F9 PK F9 MK F9
9″ ’69 & Down 28 Spline IK F9B BK F9B PK F9 MK F9
9″ ’69 & Down 31 Spline IK F9C BK F9C PK F9 MK F9
9″ 31 Spline Big Pinion IK F9BRC
9″ 35 Spline Big Pinion IK F9BRD
9″ Daytona LM102910 IK F9HDA BK F9HDA
9″ Daytona LM501310 IK F9HDB BK F9HDB
9″ Daytona LM603011 IK F9HDC BK F9HDC
9″ Daytona LM104911 IK F9HDD BK F9HDD
9.75″ IK F9.75 BK F9.75 PK F9.75 MK F9.75
9.75″ 2000 & Up IK F9.75B BK F9.75B PK F9.75B MK F9.75B
10.25″ IK F10.25 BK F10.25 PK F10.25 MK F10.25
10.5″ IK F10.5 BK F10.5 PK F10.5 MK F10.5

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Guide to Differential Repair, Rebuild and Installation Kit Contents:

Sierra Gear differential rebuild kits are typically assembled with OEM Components, including Timken or Koyo Bearings and National or Spicer Seals

Master Rebuild Kit (IK) – Our most complete Differential Rebuild Kit.

  • Pinion and Carrier Bearings
  • Pinion Seal
  • Pinion Shims (where applicable)
  • Pinion Nut
  • Crush Sleeve or Depth Shims (where applicable)
  • Ring Gear Bolts (most applications)
  • O-Ring (where applicable)
  • Gear Marking Compound & Brush
  • Loctite
  • Cover Gasket or Silicone
  • Carrier Super Shims (where applicable)
  • Slingers & Baffle (where applicable)
  • Installation Instructions

Bearing Rebuild Kit (BK) – Rebuild Kit for differential installers that already have shims and small parts.

  • Pinion and Carrier Bearings
  • Pinion Seal
  • O-Ring (where applicable)
  • Pinion Nut
  • Crush Sleeve or Depth Shims (where applicable)

Pinion Rebuild Kit (PK) – Ideal for low mileage ring & pinion gear ratio changes with no carrier change.

  • Pinion Bearings
  • Pinion Seal
  • Pinion Shims (where applicable)
  • Crush Sleeve or Depth Shims (where applicable)
  • O-Ring (where applicable)
  • Gear Marking Compound & Brush

Mini Rebuild Kit (MK) – For low mileage vehicles doing ring & pinion gear ratio changes.

  • Pinion Seal
  • Pinion Shims (where applicable)
  • Crush Sleeve or Depth Shims (where applicable)
  • Ring Gear Bolts (most applications)
  • O-Ring (where applicable)
  • Gear Marking Compound & Brush
  • Loctite
  • Carrier Super Shims (where applicable)
  • Installation Instructions