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Manufacturer Part Number: 73840-MK

Brand: Sonnax

CD4E, LA4A-EL

Master Kit
Part No. 73840-MK

    Tooling:
  • 73840-BTL
  • F-73840-TL
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

Rearmer kit 73840-RTL is no longer in production but may be available from distributor inventory. F-73840-TL is available for use prior to installation of 73840-RK.

  • 73840-RK
  • 73840-BK

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