@mercedessource.com You have to make sure your K1 drum does not overheat. You must ensure that your K1 brake band engages the same drum at the correct time. Fail this and you can damage your 722.3 or 722.4 transmission or get lousy shifts! Link to my tool: https://mercedessource.com/store/7223-7224-b1piston-removal-and-installation-tool
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