Rear 9.75 Inch Ring Gear

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DESCRIPTION
The Traction-Lok rear axle assembly, except for the differential case and its internal components is identical to the conventional rear axle. The Traction-Lok differential employs two multi-disc differential clutch packs to control differential action. The mounting distance of the differential side gear is controlled by eight plates on each side: four steel and four friction. Also included is one steel selective shim to control the position of the differential side gear (shim selection may determine that two select shims be used), and one Belleville spring plate which, because of its slight concave design, provides initial preload to the differential clutch pack. Additional clutch pack capacity is delivered from the thrust loads of the differential side gear. Steel clutch plates are splined to the side gear hub which, in turn, is splined into the axle shaft. Tabs on the friction plates are captured in the case by matching slots, thus providing continuous engagement of the differential clutch packs.

OPERATION
The pressure between differential clutch packs opposes differential action at all times. When the vehicle turns a corner, the differential clutch pack slips, allowing normal differential action to take place. Under adverse weather conditions, in which one or both wheels are on a low traction surface, such as snow, ice or mud, the friction between the clutch plates will transfer a portion of the usable torque to the wheel with the most traction. Thus, the wheel that is on ice or snow will have a tendency to operate with the opposite wheel in a combined driving effort.

CAUTION: Extended use of other than matching size spare tires on a Traction-Lok rear axle could result in a permanent reduction of the axle's ability to provide added traction on slippery surfaces. This loss of effectiveness does not affect normal driving and should not be noticeable to the driver.

The rear axle assembly has the following features:
^ An integral-type housing hypoid gear design (center of the pinion set below the centerline of the ring gear).
^ The hypoid differential ring gear and pinion consisting of a ring gear and an overhung drive pinion that is supported by two opposed tapered roller bearings.
^ Pinion bearing preload, which is maintained by a collapsible spacer on the drive pinion shaft and adjusted by the pinion nut.
^ The axle housing assembly consisting of a cast center section with two steel tube assemblies and a stamped axle housing cover.
^ The axle housing cover, which uses silicone sealant as a gasket.
^ The differential pinion shaft, which is retained by a differential pinion shaft lock bolt assembled to the differential case.
^ The differential case, which is mounted in the rear axle housing between two opposing differential bearings that are retained in the carrier by removable bearing caps.
^ Uses Synthetic Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A.
^ Differential bearing preload and ring gear backlash adjusted by differential bearing shims located between the differential bearing cups and the rear axle housing.
^ Rear axle identification on an embossed metal tag bolted to the axle housing cover.








^ The limited-slip differential containing a differential clutch pack arranged as shown in the illustration.