SPRING TORQUE REACTION
WOA6066
Torque reaction spring
For front suspension driver's side
Auxiliary spring for the front suspension on the driver's side, originally developed to compensate for asymmetric loading. This torque reaction spring was introduced during WWII as a retrofit solution for the tendency of military jeeps to sag on the left side due to the weight of driver and equipment.
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Function Torque reaction compensation front suspension |
Position Front suspension driver's side |
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Type Auxiliary spring (helper spring) |
Application WWII military jeeps and variants |
Features
- Compensates for asymmetric front suspension loading
- Attached to front leaf spring driver's side
- Helps reduce 'Willys lean'
- Requires specific mounting brackets and shackles
- Not all original vehicles had this as standard
★ This torque reaction spring was developed by Willys-Overland as an improvement kit (A-6157) following field observations. The system reduces the tendency to lean and improves stability during braking and over uneven terrain.
Application
Developed for WWII military jeeps with leaf spring front suspension. Introduced in September 1942 as a retrofit kit at the request of the Quartermaster Corps. Not all vehicles had this system from the factory - it was an optional improvement that could be fitted in the field. Fits vehicles with standard front suspension and torque reaction mounting points on chassis and front axle.
Installation notes
Installation requires torque reaction shackles, mounting bolts and U-bolts on the front axle. The spring is mounted between the main leaf spring and the frame, with the rear attached via shackles. Installation tip: first attach the U-bolts to the axle, then use C-clamps to compress the main spring and torque reaction spring together, making it easier to insert the rear shackle bolt. After installation, check that the spring eye brackets are correctly adjusted.
Compatibility
Specific to vehicles with leaf spring front suspension and torque reaction mounting provisions. NOT used on post-war civilian models (e.g. CJ-2A did not have this system). Note: not all WWII vehicles had this from the factory - check whether your chassis has the required mounting points. Incompatible with vehicles without torque reaction frame brackets.
Historical context
In 1942, the US Army Quartermaster Corps noted that military jeeps tended to sag on the driver's side, especially when heavily laden. Willys then developed kit A-6157 with this torque reaction spring as a solution. The system was described in a Technical Service Bulletin from September 1942.
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.
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB | 1942, 1943, 1944, 1945 |
| Hotchkiss M201 | 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966 |