COUNTERSHAFT TRANSMISSION T84
WO638948
Countershaft T84 transmission
Replacement part for Willys MB, Ford GPW and M201
Original specification countershaft for the Warner T84 gearbox. This shaft supports the cluster gear assembly and rotates on two bronze bushings in the transmission case. Critical component for power transmission between input shaft and main shaft.
Application T84 transmission | Suitable for Willys MB / Ford GPW / Hotchkiss M201 |
Type Countershaft (cluster gear shaft) | Material Hardened steel |
Features
- Replacement for original Warner part Supports cluster gear with gear combination 12-16-24-29 Runs in two bronze bushings in transmission case Fitted with flat recess for oil reservoir (depending on version) Locked with lock plate A638949 front and rear Compatible with thrust washers for correct axial play Part of complete power transmission chain in T84
★ The countershaft is a critical component often replaced during overhaul due to wear at the front and rear where the shaft rotates in the transmission case. A worn countershaft hole in the case can lead to leakage and incorrect gear alignment.
📖 From the Technical Manual
Mounting
- 1. Place cluster gear with thrust washers in transmission case, large gear towards rear 2. Slide countershaft from rear through cluster gear 3. Align with pre-drilled holes for lock plate 4. Check axial play cluster gear: 0.004" - 0.016" (TM spec) 5. Install lock plate and secure both ends
Specifications
- Minimum axial play cluster gear: 0.004" (0.1 mm) Maximum play (service limit): 0.016" (0.4 mm) Recommended during overhaul: 0.004" - 0.010" Play adjustable via thickness bronze thrust washer
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)
