1-800-643-2001
ADELMAN’S
2000 Waynesburg Dr. SE
Canton, Ohio 44707
Phone: 1-800-643-2001
Phone: 330-456-0206
Fax: 330.456-3959
Phone: 1-773-734-0570
Spicer 1241 heavy-duty 4-speed auxiliary transmission
| Stock Number | T1241 |
| Transmission Type | 4-Speed Constant-Mesh Auxiliary. |
| Torque Capacity | Up to 1,750 lb-ft. |
| Approximate Weight | 540 lbs. |
| Gear Configuration | Dual Countershaft layout |
The Spicer 1241 (originally manufactured by Dana Spicer, Transmission Technologies Corporation, and later Tremec) is a heavy-duty 4-speed auxiliary transmission widely referred to as a “Brownie box”. It is engineered to mount directly behind a truck’s main transmission in severe-duty, vocational, and heavy-haul commercial vehicle applications to provide additional gear choices.
Key Engineering Features
- Dual Counter shaft Design: Splitting the engine torque equally between two opposing counter shafts allows for higher torque capacity in a significantly narrower, lighter case frame.
- Gear Architecture: Uses robust, constant-mesh spur gear teeth, shifting manually with a mechanical shift lever or an integrated air shift system.
- Power Tower Compatibility: It is commonly fitted with a top-mounted auxiliary “power tower” or power take-off (PTO) unit to drive specialized body equipment.