Positive Traction Differentials: Identification
Differential can be identified as a positive traction unit by raising the vehicle and turning one of the rear wheels. With the transmission in neutral, if both rear wheels rotate in the same direction, the vehicle is equipped with a positive traction differential. Identification of the axle ratio, ring gear diameter and differential type is contained in the axle code. See Fig 1 for axle code locations.
Axle Ratio Identification
| Ratio | Code | Ring Gear Dia. | ||||
|---|---|---|---|---|---|---|
| Eaton Design | ||||||
| General Motors | ||||||
| 2.41:1 | TT, UY, VT, WT, YT | 8-3/4" | ||||
| 2.56:1 | TU, YU | 8-3/4" | ||||
| 2.73:1 | TW, WW, YW | 8-3/4" | ||||
| 2.93:1 | TX, VY, VX, WX, YX | 8-3/4" | ||||
| 3.08:1 | TY, WY, YY | 8-3/4" | ||||
| 3.23:1 | TZ, VZ, WZ, YZ | 8-3/4" | ||||
| 3.42:1 | VP, VR | 8-3/4" | ||||
| Dana Design | ||||||
| Corvette | ||||||
| 2.87:1 | (1) | (1) | ||||
| G.M. Design | ||||||
| Ford Motor Co. | ||||||
| 2.73:1 | WFZ-D | 8-1/2" | ||||
| 3.08:1 | WFZ-B | 8-1/2" | ||||
| 3.42:1 | WFZ-F, WFZ-G | 8-1/2" | ||||
| General Motors | ||||||
| 2.41:1 | LZ | 8-1/2" | ||||
| 2.56:1 | LY | 8-1/2" | ||||
| 2.73:1 | LX | 8-1/2" | ||||
| 3.08:1 | LV | 8-1/2" | ||||
| 3.23:1 | LU | 8-1/2" | ||||
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