SHIM ADJUSTING SYNCHRONISER T-84 SET
Shim set for T-84 synchroniser assembly
Mainshaft endplay shims for correct synchronizer adjustment
Shim set for adjusting the axial endplay of the mainshaft in the T-84 gearbox. These shims are fitted behind the mainshaft rear bearing and are essential for correct synchronizer operation and optimising shift quality in 2nd and 3rd gear.
Application T-84 transmission mainshaft endplay adjustment | Vehicle Willys MB, Ford GPW (1941-1945) |
Function Mainshaft axial endplay / synchronizer tolerance adjustment | Type Set with various thicknesses for precision adjustment |
Features
- Shims for mainshaft endplay adjustment per TM 9-1803B specifications Essential during overhaul to compensate for gearbox case wear Affects 3rd gear blocking ring tolerance and shift quality Various thicknesses for precision adjustment between 0.006" and 0.012" (0.15-0.30 mm) Fitted behind snap ring of mainshaft rear bearing Prevents excessive tightness or excessive clearance leading to overheating or poor shifting
★ Critical component in professional T-84 overhaul – correct endplay determines synchronizer service life and shift comfort. Worn gearbox cases require thicker shim material.
📖 From the Technical Manual
Mounting
- 1. Install mainshaft with gears and rear bearing in transmission 2. Fit test assembly with transfercase adapter or bearing retainer 3. Measure axial endplay with dial gauge – specification: 0.006"-0.012" (0.15-0.30 mm) 4. Add or remove shims until desired endplay is achieved 5. Verify bearing seats firmly against rear of transmission case
Specifications
- Required mainshaft endplay: 0.006" – 0.012" (0.15 – 0.30 mm) Measured between rear bearing and axial movement of mainshaft Excessive tightness: overheating, binding, premature wear Excessive clearance: rattling, oil leaks, difficult shifting
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 | 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)
