OIL AXLE HYP COMPOUND 5 LITRE
DIFFERENTIAL FRONT & REAR
Capacity: 1,2 litre
Change every 10000 km
Hypoid Differential Oil SAE 80W-90 GL-5
5 litre container
Professional hypoid differential oil specially formulated for military vehicles with hypoid gear construction in front and rear axles. This extreme-pressure oil with EP additives protects the spiral bevel gears against high pressure and wear as required in Spicer/Dana axles.
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Specification SAE 80W-90 API GL-5 |
Application Front and rear axles |
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Content 5 litres |
Type Hypoid EP oil |
Features
- SAE 80W-90 viscosity for wide temperature range
- API GL-5 specification with extreme-pressure additives
- Protects hypoid spiral bevel gears
- Suitable for Dana 25, Dana 44 and Spicer axles
- Meets military specifications for differential oil
★ The differential covers of these vehicles always state 'Use Hypoid Oil Only' — hypoid oil is essential due to the special cutting angle of the spiral bevel gears where the pinion shaft runs below the centre of the ring gear.
Application
For front and rear axles of military vehicles with hypoid differential. The category classification suggests application in Willys MB/Ford GPW axles (Dana 25/27 front, Spicer 23-2 rear), CJ-2A/CJ-3A/CJ-3B axles, M38/M38A1 axles, Dodge WC-series axles, and Dana 44 axles (used in later CJs and some Dodge variants). Hypoid oil is NOT suitable for gearbox or transfer case — use straight SAE 90 without EP additives there due to bronze components.
Installation notes
Fill to bottom of filler plug. Capacity varies: Dana 25/27 approximately 1.2 litres, Dana 44 approximately 1.4-1.5 litres front, 2.5 litres rear. With limited-slip differential, additional friction modifier may be required (not applicable to original WWII open differentials). Always verify that differential has hypoid gears — identifiable by marking 'Use Hypoid Oil Only' on cover.
Compatibility
ONLY for hypoid differentials (front/rear axles). DO NOT use in gearbox or transfer case — GL-5 EP additives attack bronze/copper components in the presence of moisture. For gearbox/transfer case: use straight SAE 90 GL-1 or GL-4. Hypoid oil is required because the pinion shaft runs below the centre of the ring gear, causing the gears to work under extreme pressure.
Historical context
Hypoid differentials became standard in the automotive industry in the 1930s. The spiral bevel gear construction allowed for a lower propeller shaft tunnel, but required special EP oil. Military vehicles used this technology for compact, robust axles.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
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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.
ALL_CATEGORIES : GROUP 11 - REAR AXLE, PONT ARRIERE/REAR AXLE DODGE, GROUP 11 REAR AXLE DANA 44, AXLE FRONT EARLY 4X4|6X6, PONT ARRIERE/REAR AXLE DODGE EARLY, GROUP 10 - FRONT AXLE CJ2A, GROUP 11 - REAR AXLE CJ2A, GROUP 10 - FRONT AXLE CJ3A, GROUP 10 - FRONT AXLE - M38, GROUP 11 REAR AXLE DANA 44 3B, GROUP 10 - FRONT AXLE CJ3B, GROUP 11 REAR AXLE DANA 44 CJ3B
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)
