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PLATE LOCK COUNTERSHAFT AND IDLER T84
WO638949
Countershaft and Reverse Idler Shaft Lock Plate T84
Countershaft and Reverse Idler Shaft Lock Plate - Willys MB / Ford GPW
Original lock plate that secures the countershaft and reverse idler shaft in the T84 gearbox. This critical component prevents axial movement of both shafts during operation and is essential for correct transmission function.
Application T84 transmission | Vehicle Willys MB / Ford GPW (1941-1945) |
Original number WO-638949 | Position Between transmission and transfer case |
Features
- Secures countershaft and reverse idler shaft simultaneously Positioned in recess at rear of transmission housing Prevents axial movement of both shafts Critical for correct countershaft end play (0.004-0.016 inch per TM 9-1803B) Replacement part for broken or damaged plate Required during every T84 overhaul
★ This component is specified in TM 9-1803B as 'Countershaft and Idler Shaft Lock Plate' and is visible on the technical drawings of the T84 transmission assembly. When mounting the transmission to the transfer case, this plate must be correctly positioned in the recess of the transfer case housing.
📖 From the Technical Manual
Mounting
- 1. Position reverse idler gear in housing, ensure slot in shaft is correctly aligned for lock plate 2. Install countershaft partially to hold thrust washers in position 3. Align slot in countershaft with slot in reverse idler shaft 4. Place lock plate so that both slots are secured 5. Check that plate fits correctly in recess of transfer case housing before bolting transmission
Specifications
- Countershaft end play: 0.004-0.016 inch (TM 9-1803B specification) Service limit end play: 0.016 inch max Reverse idler gear: 16 teeth Transmission type: Warner T84J, 3-speed synchronous mesh
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 |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 1942, 1943, 1944, 1945 |
| Ford GPW (early) | 1942 |
| Ford GPW | 1942, 1943, 1944, 1945 |
| Hotchkiss M201 (early) | 1956, 1957, 1958, 1959 |
| Hotchkiss M201 | 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966 |
📐 Diagrams & technical drawings
From the original Technical Manual TM 9-1803B — Ordnance Maintenance — Power Train, Body & Frame — only for Willys MB / Ford GPW (¼-ton 4×4)
