The CD4E transmission frequently exhibits such symptoms as lube failure, harsh shifts and line pressure instability as well as a variety of TCC Lockup issues. Sonnax master kit 73840-MK contains both the Regulator Kit 73840-RK and the Bypass Kit 73840-BK to address issues in both areas. See the individual kits for more detail.
Both the Regulator and Bypass Kits require reaming for installation. See options below:

Use 73840-BTL & 73840-RTL or
Use 73840-BTL & F-73840-TL & VB-FIX

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