GEAR SET REAR AXLE EARLY
Ring and Pinion Set Rear Axle 4.89:1
For early Dodge with 8¾" differential
Replacement ring and pinion set for early Dodge WC series military lorries with 8¾ inch (8.75") rear axle differential. This set with 4.89:1 ratio was originally standard in the ½-ton models and is also used as an upgrade in early ¾-ton lorries for higher road speeds.
|
Application Vroege Dodge achteras (8¾") |
Ratio 89:1 |
|
Ring gear 44 tanden |
Pinion 9 tanden |
Features
- Suitable for 8¾ inch (8.75") differential
- Ratio 4.89:1 (44 tooth ring, 9 tooth pinion)
- For early Dodge WC series lorries
- Replacement or upgrade for higher road speed
- Front and rear axle must have the same ratio
★ Essential replacement part for the drivetrain of early Dodge military lorries. When replacing the ratio in one axle, the other axle must be fitted identically to prevent damage to the drivetrain.
⚠ Important
- Front and rear axles must have identical ratio
- With different ratios, serious damage occurs in 4WD to transfer case and drivetrain
- Verify that your differential is 8¾" (pinion seal ±3½") and not the later 9⅝" version
Application
This ring and pinion set fits the early Dodge WC series lorries with 8¾" differential. This includes the standard ½-ton 4x4 models (approx. 1940-1942) and early ¾-ton models (approx. 1941-early 1942) which still had the smaller 8¾" differential. Later ¾-ton lorries received the larger 9⅝" differential and require a different ring and pinion set. Identification: the early 8¾" differential has a pinion seal of approximately 3½ inch diameter.
Installation notes
When replacing ring and pinion, correct adjustment of pinion depth and backlash is critical. The set must be fitted in both front and rear axles — different ratios between axles lead to serious damage to the drivetrain when using four-wheel drive. New bearings, seals and shims are usually required.
Compatibility
Exclusively for early Dodge lorries with 8¾" (8.75 inch) differential. NOT compatible with the later 9⅝" (9.625 inch) differential which became standard from mid-1942 on ¾-ton and 1½-ton models. The standard ratio for ¾-ton lorries was 5.83:1; this 4.89:1 set was often fitted post-war as an upgrade for higher road speeds.
Historical context
The 4.89:1 ratio was the standard drive ratio in the Dodge WC ½-ton 4x4 military lorries during WWII. After the war, many owners also fitted this ratio in early ¾-ton lorries for more comfortable driving on surfaced roads, at the expense of off-road pulling power.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
This part is intended for the restoration of historic military vehicles. Fitting, aligning, deburring or reworking is part of that work and is inherent to the nature of these goods. Dimensional variation also exists between original vehicles.
Installation requires technical knowledge of the vehicle. Unsure whether this part suits your version? Ask us before purchase at info@willys.be.
This part fits:
| Model | Years |
|---|---|
| Dodge | |
| Alle Dodge WC / M-serie | 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968 |
📐 Diagrams & technical drawings
From the original Technical Manual TM 9-808 — Technical Manual — only for Dodge ¾-ton 4×4 (WC series)
