Description

The Ford Truck Integral Carrier rear axle assembly is an integral type housing, hypoid gear design with the centerline of the pinion set below the centerline of the ring gear.

The hypoid gear set consists of an 8.8 inch diameter ring gear and an overhung drive pinion which is supported by two opposed tapered roller bearings. Pinion bearing preload is adjusted by the pinion nut and a collapsible spacer maintains the seating of the inner race.

The housing assembly consists of a cast center section with two steel tube assemblies and a stamped rear cover. The cover uses a silicone sealant as a gasket.

The differential case is a one-piece design with two openings to allow for assembly of the internal components and lubricant flow. The differential pinion shaft is retained with a threaded bolt assembled to the case. The differential case assembly is mounted in the carrier between two opposed tapered roller bearings. The bearings are retained in the carrier by removable bearing caps.

The axle is available in two models to accommodate tread width differences between the vehicle lines. They are similar except for minor suspension bracket connections and variations in axle shaft and housing tube lengths.

- Differential Bearing Preload and Ring Gear Backlash are adjusted by the use of shims located between the Differential Bearing Cup/Races and the Carrier Housing.

- The use of a Pinion Depth Gauge Tool for drive pinion shim selection in conjunction with a dial indicator for differential case shim selection is required for proper gear set adjustment.

- The Semi-Floating Axle Shafts are held in the Housing by C-washer locks positioned in a slot on the Axle Shaft Splined End. These C-washers also fit into a machined recess in the differential side gears within the differential case.

Rear Antilock Brakes

F-150 and Bronco vehicles use the Rear Anti lock Brake System (RABS). The system features a multi- tooth excitor ring that is pressed on the differential case behind the ring gear. If the excitor ring is removed, it must be discarded and replaced with a new one. The excitor ring works in conjunction with an electronic speed sensor. This sensor is retained in a bore at the top of the carrier housing and fastened by one bolt. There is a space provided between the ring gear and excitor ring for measuring the ring gear back face runout.