Mercedes-Benz 722.6 (NAG1) F1 Sprag Clutch Overhaul Analysis
One way clutch,sprag F1 automatic transmission 722.6 (96-up) A7222700031
One way clutch F1 722.6 transmits rotation of 1st and low reverse gears. In case of one way clutch turning there is a blow during braking at the time of shifting to the first gear. Drum K1 722.6 is often replaced.
Mercedes C230 (1.8L, 2.3L), C240 (2.6L), C280 (2.8L), C280 (3.0L), C320 (3.2L), C350 (3.5L), C36 (3.6L), C43 (V8 4.3L), C55 (V8 5.5L), CL500 (V8 5.0L), CL55 AMG (V8 5.5L), CL600 (V12 5.5L, 5.8L, 6.0L), CL65 AMG (V12 6.0L), CLK430 (V8 4.3L), CLK500 (V8 5.0L), CLK55 AMG (V8 5.5L), CLS55 AMG (V8 5.5L), E220 (2.2L CDI), E300 (L6 3.0L),E320 (3.2L Diesel), E350 (V6 3.5L), E420 (V8 4.2L), E430 (V8 4.3L), E500 (V8 5.0L), E55 AMG (V8 5.5L), G500 (V8 5.0L), G55 AMG (V8 5.5L), ML320 (V6 3.2L), ML350 (V6 3.5L), ML430 (V8 4.3L),ML500 (V8 5.0L), ML55 (V8 5.5L), S320 (L6 3.2L), S350 (V6 3.7L), S420 (V8 4.2L), S430 (V8 4.2L), S500 (V8 5.0L), S55 AMG (V8 5.5L), S600 (V12 5.5L, 5.8L, 6.0L), S65 AMG (V12 6.0L), SL500 (V8 5.0L), SL55 AMG (V 5.5L), SL600 (V12 6.0L Bi-Turbo), SL65 AMG (V12 6.0L Bi-Turbo), SLK230 (L4 2.3L, V6 3.2L), SLK23 AMG (V6 3.2L), SLK350 (V6 3.5L), SLR McLaren (V8 5.7L)
SsangYong Chairman, Actyon, Kyron, Rexton
Jaguar XJR (V8 4.0L)
Jeep Commander (3.7L), Grand Cherokee (4.7L, 5.7L, 6.1L)
Dodge Challenger (5.7L, 6.1L), Charger (3.5L, 5.7L, 6.1L), Magnum (3.5L, 5.7L, 6.1L), Nitro (4.0L), Sprinter Van (2.7L Diesel)
Chrysler Crosslife (3.2L)
The Mercedes 722.6 (NAG1) F1 Sprag Clutch (A7222700031) is a critical one-way mechanical component responsible for torque synchronization in the 1st and low reverse gears. In high-mileage or high-torque applications—ranging from the Mercedes E55 AMG to the Jeep Grand Cherokee 6.1L SRT8—the F1 overrunning clutch is prone to mechanical fatigue. A definitive failure symptom is a noticeable mechanical “blow” or thump felt during deceleration as the transmission downshifts into 1st gear. This impact occurs because the sprag fails to lock correctly against the Drum K1, leading to asynchronous gear engagement.
LST’s A7222700031 F1 Sprag Clutch is precision-engineered to restore the seamless shifting dynamics of the Mercedes 722.6 (5G-Tronic) transmission. Manufactured from ultra-hardened GCr15 steel, this component features a high-density sprag element configuration designed to withstand the massive hydraulic line pressure of V12 Bi-Turbo and SRT8 power plants.
The F1 sprag is essential for transmitting the rotation of 1st and low reverse gears. When failure occurs, the resulting “turning” causes harsh impact shifts during braking. Professional transmission rebuilders recommend a simultaneous replacement of Drum K1 to ensure surface integrity and long-term durability. Offering 100% drop-in interchangeability for the NAG1 platform, this part supports a wide range of vehicles, including the Mercedes S600, Dodge Challenger, and Jeep Grand Cherokee. Secure your drivetrain with LST’s zero-defect components to eliminate gear slippage and prevent catastrophic gearbox damage.
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