Ford Mustang (1999-2004) Service Manual: Rear Drive Axle and Differential
- The differential housing (4010) consists of a cast aluminum housing and a cast aluminum differential housing cover (4033). The differential housing cover uses silicone sealant as a gasket.
- The hypoid-design gearset consists of a 8.8-inch differential ring gear
and a drive pinion gear.
Two opposed pinion bearings (4621) (4630) support the drive pinion gear in the differential housing.
- A differential drive pinion collapsible spacer (4662), located on the drive pinion gear shaft, maintains pinion bearing preload. The pinion nut adjusts the preload.
- Differential bearing shims (4067), located between the differential bearing cups (4222) and the differential housing, adjust the differential ring gear backlash and the differential bearing preload.
- The differential case (4204) is a one-piece design with two openings to allow for assembly of the internal components and lubricant flow. Two opposed differential bearings (4221) support the differential case in the differential housing. Removable differential bearing caps retain the differential assembly in the differential housing.
- Inside the differential case, the differential pinion shaft (4211) supports two differential pinion gears (4215). The pinion gears engage the differential side gears (4236), to which the halfshafts are splined. The differential pinion shaft lock bolt retains the differential pinion shaft in the differential case.
- A circlip, located on the inboard CV joint stub shaft, holds the
halfshaft in the differential case.
When installed, the circlip engages a groove in the differential side gear.
- The rear axle uses SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A.
- An embossed metal tag, bolted to the differential housing cover, contains rear axle identification.
Rear Drive Axle/Differential - Ford 8.8-Inch IRS
General Specifications
Torque Specifications
a: Use Stud and Bearing Mount EOAZ-19554-BA or equivalent meeting Ford
specification WSKM2G349-
A1.
b: With pinion flange yoke seal. ...
Stub Shaft Pilot Bearing and Seal
Special Tool(s)
Remover, Bearing Cup
308-047 (T77F-1102-A)
Protector, Differential Seal
(Pair)
205-461
Installer, Differential Oil Seal
205-293 (T89P-4850-A)
...
Other materials:
Spark Plug - Inspection
1. Inspect the spark plug for a bridged gap.
Check for deposit build-up closing the gap between the electrodes.
Deposits are caused
by oil or carbon fouling.
Clean the spark plug.
2. Check for oil fouling.
Check for wet, black deposits on th ...
Engine - 3.8L
General Specifications
a - 20-200 seconds to leakdown 3.18 mm (0.125 in) with 225 Newtons (50
pounds) load and tappet filled
with leak-down fluid.
Torque Specifications
a - Refer to the procedure in this section
b - Advance one-half turn aft ...
Cleaning the engine
Engines are more efficient when they are clean because grease and dirt
buildup keep the engine warmer than normal.
When washing:
• Take care when using a power washer to clean the engine. The
high-pressure fluid could penetrate the sealed parts and cause
da ...
