BEARING ROLLER MAIN SHAFT ON REAR 6307Z T90
WO644551
Main shaft rear bearing T90 transmission
Type 6307Z
Ball bearing set for the rear of the main shaft in the Borg-Warner T90 3-speed gearbox, fitted at the junction with the transfer case. This bearing supports the rear of the main shaft and is a critical component for smooth operation and prevention of oil leakage at the transmission output.
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Type 6307Z (single shield) |
Dimensions 35 × 80 × 21 mm |
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Application T90 transmission rear main shaft |
Original number 644551 |
Features
- Deep groove ball bearing set suitable for radial and axial loads
- Single shielded (Z-type) for protection against contamination
- Steel cage for robustness and reliability
- Dimensions 35 mm bore × 80 mm outer diameter × 21 mm width
- Mounted on rear main shaft where transmission meets transfer case
★ Quality ball bearing set to original specifications. This bearing, together with the bearing adapter (644552) and spacer ring (643621), forms the complete rear bearing assembly of the T90 main shaft.
Application
Suitable for all vehicles equipped with Borg-Warner T90 transmission. Original part number 644551. Note: the T90 was produced in various versions (T90A, T90A1, T90C, T90J) for different engines, but all used the same rear bearing on the main shaft.
Installation notes
Fitting requires removal of the transfer case and partial dismantling of the transmission from the rear. Bearing is fitted behind spacer ring 643621 and secured with bearing adapter 644552. During overhaul always check the needle bearings between main shaft and input shaft and the front main shaft bearing as well. Transmission and transfer case share the same oil level.
Compatibility
Fits all T90 transmissions regardless of version (4-cylinder or 6-cylinder versions). Use together with adapter 644552. Note: a sealed version of this bearing is also available and helps reduce oil leakage at the output to the transfer case.
Historical context
The Borg-Warner T90 was the standard 3-speed gearbox for civilian Jeeps from 1945 to the early 1970s and was considered a robust and reliable transmission behind the L-134 and F-134 engines.
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.
ALL_CATEGORIES : GROUP 07 - TRANSMISSION CJ3A, GROUP 07 - TRANSMISSION - M38, GROUP 07 - TRANSMISSION CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys M38 | 1950, 1951, 1952 |
| Willys M38A1 | 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971 |
| CJ series | |
| Jeep CJ-2A | 1945, 1946, 1947, 1948, 1949 |
| Jeep CJ-3A | 1949, 1950, 1951, 1952, 1953 |
| Jeep CJ-3B | 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968 |
📐 Diagrams & technical drawings
From the original Technical Manual CJ2A_PL_1949 — Parts List — only for Willys CJ-2A / CJ-3A (1949)
