Ford 10R80 transmissions commonly suffer from the CDF drum sleeve shifting rearward, exposing fluid ports from behind the sleeve. This fluid loss leads to bump slides, neutral shifts, slide shifts and loss of 2nd Gear.

Installing Sonnax CDF drum saver kit 129910-01K restores proper CDF drum functionality. The step on the Sonnax sleeve prevents it from shifting rearward in the drum, and a set screw locks the sleeve from rotating. Whether installing to fix a shifted sleeve or using as a preventive solution, the Sonnax CDF drum saver kit is the key to avoiding CDF drum replacement.

• Improved sleeve press fit vs OE sleeve
• Locking set screw keeps sleeve from rotating
• Replacement CDF drum bushings included for complete repair
• Convenient tool kit 129910-TK available for easy install and retention