1994-2007 Cummins Sonnax 2nd Gear Super Hold Servo Kit (22301B-01K)

The Sonnax 2nd Gear Super Hold Servo is the largest and most leak-free servo available for these transmissions, delivering stronger 2nd gear band holding force while reducing the need for aggressive lever ratios. The increased apply area and improved sealing sharpen the 1-2 and 2-3 shifts and help eliminate 2-3 shift flare, making it a key upgrade for performance and towing builds.

Part #: 22301B-01K

• 16% more apply area than the OE servo for stronger 2nd gear band holding
• 15% less leakage than competing servo designs
• Anodized billet aluminum construction for durability
• Improves 1-2 and 2-3 shift quality and helps resolve 2-3 shift flare
• Reduces the need for aggressive lever ratios

• Also compatible with 46RE, 46RH, 47RH, 47RE, 48RE and A727 transmissions

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