Section 05-03D: Differential, Front Drive, Dana Model 44 Limited Slip | 1996 F-150 4x4 Front Axle Vehicles Workshop Manual |
The limited slip Dana Traction-Lok® Model 44 IFS has a power flow identical to a conventional rear axle (4001), plus a more direct power flow which automatically takes effect as driving conditions demand. This more direct power flow is from the differential case (4204) to each axle shaft (4234) through differential clutch packs.
The limited slip differential (4026) is similar to a conventional differential, except part of the torque from the ring gear is transmitted through differential clutch packs between the differential side gears (4236) and differential case. The differential clutch packs are engaged by a preload from dished springs and separating forces from the differential side gears. This occurs as torque is applied through the ring gear.
Two-Pinion Limited Slip Differential, Model 44 IFS Traction-Lok®
| Item | Part Number | Description |
|---|---|---|
| 1 | 4204 | Differential Case |
| 2 | 4241 | Differential Pinion Shaft Lock Pin |
| 3 | 4236 | Differential Side Gear |
| 4 | — | Retainer Clip (Part of 4880) |
| 5 | 4230 | Differential Pinion Thrust Washer |
| 6 | 4215 | Differential Pinion Gears |
| 7 | — | Dished Spacer (Part of Rear Axle Disc and Plate Kit) May Have External Lugs, Like the Plate |
| 8 | — | Clutch Disc (Part of 4880) |
| 9 | — | Clutch Plate (Part of 4880) |
| 10 | 4211 | Differential Pinion Shaft |
Limited Slip Differential Power Flow with Both Wheels Driving
| Item | Part Number | Description |
|---|---|---|
| 1 | — | Drive Pinion (Part of 3222) |
| 2 | 4215 | Differential Pinion Gear |
| 3 | 4880 | Differential Clutch Pack |
| 4 | 4236 | Differential Side Gear |
| 5 | 4204 | Differential Case |
| 6 | — | Differential Ring Gear (Part of 3222) |
A conventional differential transmits all of the ring rear torque through the differential side gears to the axle shafts. Torque is at all times equal on the axle shafts and if one wheel slips, the other wheel can only put out as much torque as the slipping wheel.
The limited slip differential has the same power flow as a conventional differential plus a more direct flow which automatically takes effect as driving conditions demand. This more direct flow is from the differential case to each axle shaft through a clutch plate and disc arrangement. Arrangement of these plates and discs is at the option of the vehicle manufacturer, so care should be taken during disassembly to note the arrangement of these components.
In diagnosis of vehicle operators' complaints, two things should be recognized:
Each differential clutch pack is premeasured for proper stack height. Do not separate differential clutch packs and intermix the clutch plates and clutch discs from the differential clutch packs.