PLUNGER GEARSHIFT INTERLOCK T84
WOA1385
Gearshift Lever Interlock Plunger T84
Interlock plunger
Essential safety component for the T84 gearbox that prevents two gears from being engaged simultaneously. The plunger is located between the gearbox and transfer case and ensures that one gear lever must always be in neutral before the other can move.
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Application T84 gearbox |
Function Interlock / locking |
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Part number A1385 |
Quantity required 1 per vehicle |
Features
- Prevents simultaneous gear engagement
- Located between gearbox and transfer case
- Critical component during gearbox and transfer case assembly
- OEM reference number A1385
- Replacement part for T84 transmission
★ Properly finished component with rounded and polished ends for smooth operation. Essential for safe shifting operation of the T84 gearbox.
Application
For vehicles equipped with T84 three-speed gearbox (1941-1945). The interlock plunger is fitted between the gearbox and transfer case where the gear levers pass through the housing.
Installation notes
The plunger must be installed when both gear levers are in neutral position. During assembly, apply a small amount of grease in the slot to hold the plunger in place. Caution: Do NOT use RTV or thick silicone sealant on the gasket between gearbox and transfer case, as this can cause the plunger to stick. Use a thin coat of copper spray or Hi-Tack on the gasket. Check that the plunger can move freely in the slot and is not too long — an excessively long plunger can score grooves in the gear levers.
Compatibility
Specific to T84 gearboxes. Before installation, check the length of the plunger and the condition of the ends — these must be smooth, rounded and polished. A worn or excessively long plunger can jam between the gear levers and cause shifting problems. With insufficient lubrication or incorrect length, the gearbox may lock in neutral.
Historical context
The T84 gearbox was the standard three-speed transmission for WWII jeeps and was produced by Warner Gear (Borg-Warner). The interlock plunger was a fundamental safety component that prevented catastrophic damage to the gearbox by ensuring that two gears could never be engaged simultaneously.
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 08 - TRANSFER CASE
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 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)
