What part number is the differential case on the Ford 8.8 rear axle?

The differential case is labeled with part number 4204.

What are the pinion bearing part numbers for the Ford 8.8 axle?

The rear pinion bearing is 4630 with cup 4628; the front pinion bearing is 4621 with cup 4616.

Which vehicles does the diagram say use the rear anti-lock brake sensor and excitor ring?

The rear anti-lock brake sensor is labeled for Bronco and F-150, and the excitor ring is for Bronco and F-150 with rear anti-lock brakes.

How are the axle shafts retained in the Ford 8.8 semi-floating axle?

The diagram shows a C-lock retaining the axle shafts, secured via the differential pinion shaft (4211) and its lock bolt.

What is the part number for the axle housing and axle shaft assembly?

The axle housing assembly is 4010 and the axle shaft assembly is 4234.

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Ford 8.8" Semi-Floating Rear Axle Exploded Diagram – Parts & Part Numbers

Exploded parts diagram of Ford 8.8-inch semi-floating rear axle with labeled differential, gears, bearings and brake components

8.8" Axle Exploded, with open differential
IF THE IMAGE IS TOO SMALL, click it.
Early versions have a ~2.87" hub flange stickout (pilot), causing the wheels to be lugcentric. Most have ~3.47" (~'87-96) and hubcentric wheels.

Axle Shaft (4234)
Left: E7TZ4234B, Omix-Ada Ultimate, Motive, Dorman 630-201, SVL 2022605-2
Right: E7TZ4234A, Omix-Ada Ultimate, Motive, Dorman 630-200, SVL 2022605-1

Seal Assembly (1177): Motorcraft BRS-40 or Ford E3TZ-1S177-A, Spicer 39246
U-washer (4N237) (C-clip or C-lock): Yukon YSPCC-010
Pinion Shaft (4211): Yukon YSPXP-027, Yukon YSPXP-026
Pinion Shaft Lock Bolt: Ford D8BZ-4241-C, APDTY 92159, Dorman/HELP 81048
Pinion Seal: Ford BR3Z-4676-A, National 3604, Timken 3604

Ford 8.8" axle uses 10 lug studs D6AZ-1107-A ('83-00)
Dana 44IFS uses 10 lug studs D6TZ-1107-A ('83-96)
Ford TIB axle uses 10 lug studs F4UZ-1107-A ('94-96)

For limited slip (Eaton Traction Lok), see:

Ford/MotorCraft XL-3 Friction Modifier Additive

Fullsize truck owners love to hate the 8.8", and are often hung-up on the 9", but the 2011 Local Motors' Rally Fighter micro-production 2WD vehicle uses a stock 8.8" with stock TracLok spinning ~33" tires, and is powered by the 430hp/450lb-ft GM E-rod & 4L85E. See the article in Off Road March 2011 p.28-30. In a different article in the same issue, one of the writers expresses a desire to swap an 8.8" into his Jeep, on p.63.

See also:

Owner caption January 2024 · Photo 0 of 5000

This document is an exploded parts diagram of the Ford 8.8-inch semi-floating rear axle assembly. It labels every major component of the axle with its Ford base part number where applicable, including the differential internals (cover 4033, thrust washers 4230/4228, pinion gear 4215, differential pinion shaft 4211, side gear 4236, differential bearing 4221 and cup 4222, differential shims 4067, differential case 4204, gear set 4209), the pinion assembly (rear pinion bearing 4630 and cup 4628, front pinion bearing 4621 and cup 4616, spacer 4662, slinger 4670, pinion seal 4676, flange 4851, pinion nut 4851, pinion shim), the axle housing 4010, axle shaft assembly 4234, axle bearing 1225, seal 1177, brake assembly 2209/2210, and brake drum 1126. It also identifies hardware and features such as the C-lock, differential pinion shaft lock bolt, ratio tag, ring gear bolts, vent hose, remote axle vent assembly, filler plug, junction block, brake line clip, brake backing plate nut, wheel bolt, and spring push-on nut. The diagram specifically notes the rear anti-lock brake sensor and excitor ring as applying to Bronco and F-150 models with rear anti-lock brakes. It is useful for identifying parts and understanding assembly order of the 8.8" rear axle.

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Frequently asked questions

What part number is the differential case on the Ford 8.8 rear axle?: The differential case is labeled with part number 4204.
What are the pinion bearing part numbers for the Ford 8.8 axle?: The rear pinion bearing is 4630 with cup 4628; the front pinion bearing is 4621 with cup 4616.
Which vehicles does the diagram say use the rear anti-lock brake sensor and excitor ring?: The rear anti-lock brake sensor is labeled for Bronco and F-150, and the excitor ring is for Bronco and F-150 with rear anti-lock brakes.
How are the axle shafts retained in the Ford 8.8 semi-floating axle?: The diagram shows a C-lock retaining the axle shafts, secured via the differential pinion shaft (4211) and its lock bolt.
What is the part number for the axle housing and axle shaft assembly?: The axle housing assembly is 4010 and the axle shaft assembly is 4234.