Differential Case and Ring Gear - Trac-Lok®: Assembly

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: After assembly, make sure that the side gear splines engage the clutch pack splines and the differential side gear is fully seated.

Assemble and install the side gear, the rear axle disc and plate kit in the flange half of the differential case. Assemble and install the side gear, the rear axle disc and plate kit in the top half of the differential case.

Fig 1: Identifying Differential Side Gear, Clutch Friction Discs And Clutch Plates

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	4236	Differential side gear
2	-	Preload spacer (part of 4880)
3	-	Dished clutch disc (part of 4880)
4	-	Clutch friction disc (part of 4880)

NOTE: Power-Lok® shown Trac-Lok® similar.

NOTE: Align the index marks made during disassembly.

Place the differential pinion shaft and differential pinion gears in the case top half.

Fig 2: Locating Differential Pinion Shaft And Differential Pinion Gears
Courtesy of FORD MOTOR CO.
NOTE: Align the index marks made during disassembly.

Install the other differential pinion shaft and differential pinion gears in the flange half of the differential case.

Fig 3: Locating Differential Pinion Shaft And Differential Pinion Gears
Courtesy of FORD MOTOR CO.
NOTE: Align the match marks made during disassembly.

Assemble the differential case.
- Place the top half of the differential case onto the flange half of the differential case assembly.
- NOTE: The bolts must be clean and dry.
  
  Install the bolts. Turn each one in a few threads.
- Tighten the bolts evenly and alternately.
  - Tighten to 129 Nm (95 lb-ft).
    
    Fig 4: Locating Differential Case Bolts
    Courtesy of FORD MOTOR CO.
NOTE: If removed, install the anti-lock speed sensor ring.

Start 2 new ring gear bolts through the differential case flange, the anti-lock sensor ring and into the differential ring gear to make sure the differential ring gear and the differential case align.

Fig 5: Locating Differential Ring Gear And Differential Case Alignment Bolts
Courtesy of FORD MOTOR CO.
Press the anti-lock speed sensor ring and differential ring gear on the differential carrier. The differential carrier flange acts as a pilot for the anti-lock speed sensor ring.

Fig 6: Pressing Anti-Lock Speed Sensor Onto Differential Case
Courtesy of FORD MOTOR CO.
Install the 10 new remaining ring gear bolts alternately and evenly.
- Tighten to 298 Nm (220 lb-ft).
  
  Fig 7: Locating Ring Gear Bolts
  Courtesy of FORD MOTOR CO.
Install the differential carrier. For additional information, refer to DIFFERENTIAL CARRIER .