Section 05-02B: Axle, 10.25-Inch Ring Gear | 1997 F-250 Heavy Duty and F-350 (Full-Float) Workshop Manual |
The Dana design limited slip differential option is available on F-250 Heavy Duty and F-350 vehicles with 10.25-inch ring gear rear axles.
NOTE: Overhaul of the Traction-Lok® differential must be performed with the differential assembly removed from the differential housing.
The limited slip assembly is identical to the conventional rear axle except for the differential case and its internal components. The limited slip differential employs two sets of multiple-disc clutches to control differential action. The differential side gear mounting distance is controlled by 10 clutch plates on each side; 5 friction, 5 steel and one tabbed Belleville differential clutch spring to provide an initial force to the clutch pack. The differential clutch pack consists of two plate designs: a splined clutch plate that engages the splines of the side gear hub, and alternate-tabbed and stationary clutch plates.
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 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.
Dana Design Limited Slip Differential-Cutaway View
| Item | Part Number | Description |
|---|---|---|
| 1 | 4215 | Differential Pinion Gear |
| 2 | 4880 | Differential Clutch Pack |
| 3 | 4236 | Differential Side Gear |
| 4 | 4241 | Differential Pinion Shaft Lock Bolt |
| 5 | 4880 | Differential Clutch Pack |
| 6 | 4211 | Differential Pinion Shaft |
Integral Carrier, Rear Axle Assembly, Disassembled View, Full-Floating Axle, Typical
| Item | Part Number | Description |
|---|---|---|
| 1 | 4033 | Axle Housing Cover |
| 2 | — | Ratio Tag (Not Serviced) |
| 3 | 390864-S2 | Screw |
| 4 | 4230 | Differential Pinion Thrust Washer |
| 5 | 4215 | Differential Pinion Gear |
| 6 | 4211 | Differential Pinion Shaft |
| 7 | 4236 | Differential Side Gear |
| 8 | 4228 | Differential Side Gear Thrust Washer |
| 9 | 4221 | Differential Bearing |
| 10 | 4067 | Differential Bearing Shim |
| 11 | 4222 | Differential Bearing Cup |
| 12 | 43114-S100 | Ring Gear Bolt |
| 13 | 4204 | Differential Case |
| 14 | 4663 | Drive Pinion Bearing Adjustment Shim |
| 15 | 46157-S100 | Bearing Cap Bolt |
| 16 | — | Differential Bearing Cap (Part of 4010) |
| 17 | 2C190 | Rear Brake Anti-Lock Sensor |
| 18 | 390356 | Bolt, Rear Brake Anti-Lock Sensor |
| 19 | 4022 | Rear Axle Housing Vent |
| 20 | 4010 | Rear Axle Housing |
| 21 | 390943-S100 | Filler Plug |
| 22 | 4662 | Differential Drive Pinion Collapsible Spacer |
| 23 | 4670 | Rear Axle Drive Pinion Shaft Oil Slinger |
| 24 | 4851 | Rear Axle Universal Joint Flange |
| 25 | 389546-S100 | Pinion Nut |
| 26 | 4676 | Rear Axle Drive Pinion Seal |
| 27 | 4621 | Differential Pinion Bearing (Outer) |
| 28 | 4616 | Differential Drive Pinion Bearing Cup (Outer) |
| 29 | 1240 | Outer Bearing |
| 30 | 1A124 | Hub Nut |
| 31 | 1126 | Brake Drum |
| 32 | 4234 | Axle Shaft |
| 33 | 46053-S100 | Bolt, Axle Shaft |
| 34 | 390258-S | O-Ring, Axle Shaft |
| 35 | 1109 | Rear Hub |
| 36 | 390268-S | Press Fit Stud |
| 37 | 2211 | Brake Backing Plate |
| 38 | 1239 | Outer Bearing Cup |
| 39 | 1202 | Bearing Cup |
| 40 | 1244 | Rear Wheel Bearing Inner Cone and Roller |
| 41 | 1250 | Rear Wheel Bearing Oil Slinger |
| 42 | 1177 | Inner Wheel Bearing Oil Seal |
| 43 | — | Keyway (Part of 4010 Housing) |
| 44 | — | Spindle (Part of 4010 Housing) |
| 45 | 4628 | Rear Axle Pinion Bearing Cup (Inner) |
| 46 | 4630 | Differential Pinion Bearing (Inner) |
| 47 | 4209 | Differential Ring Gear and Pinion |
| 48 | 4B409 | Anti-Lock Speed Sensor Ring |
| 49 | 4241 | Differential Pinion Shaft Lock Bolt |
| 50 | — | Four Clearance Holes in Drum for Wheel Pin and Hub (Part of 1126) |
| 51 | 1107 | Lug Bolts |
| 52 | — | Two Wheel Pin Locating Holes (Part of 1116) |
| 53 | 1012 | Lug Nut |
| 54 | — | Locating Hole in Wheel (Part of 1001) |
| 55 | — | Locating Hole in Wheel (Part of 1001) |
| 56 | 305136-S7 | Locating Pin in Wheel (Part of 1001) |
| A | — | Tighten to 38-52 Nm (28-38 Lb-Ft) |
| B | — | Install a new lock bolt or apply Threadlock® and Sealer EOAZ-19554-AA or Equivalent Meeting Ford Specification WSK-M2G315-A5 (Type II) to the used lock bolt threads. Tighten to 20-40 Nm (15-30 Lb-Ft). |
| C | — | Tighten to 109-129 Nm (80-95 Lb-Ft) |
| D | — | Tighten to 34-40 Nm (25-30 Lb-Ft) |
| E | — | Tighten to 20 Nm (15 Lb-Ft) |
| F | — | Tighten to 20-40 Nm (15-30 Lb-Ft) |
| G | — | Pinion Bearing Preload For Used Bearings 0.9-1.5 Nm (8-14 Lb-In); For New Bearings 1.8-3.3 Nm (16-29 Lb-In). |
| H | — | Tighten to 95-115 Nm (70-85 Lb-Ft) |
| J | — | Apply Threadlock® and Sealer EOAZ-19554-AA or Equivalent Meeting Ford Specification WSK-M2G315-A5 (Type II). Tighten to 136-163 Nm (100-120 Lb-Ft). |
| K | — | Tighten to 100-180 Nm (74-133 Lb-Ft) (Five lug). Tighten to 170-230 Nm (126-170 Lb-Ft) (Eight Lug) |