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  • 3-4 Clutch burned
  • Reduced band life
  • Soft slide shifts


MTV boost loss and insufficient line rise.


Install the appropriate Sonnax TV boost valve kit.

200-4R, 4L60

TV Boost Valve Kit
Part No. 77917-03K

.471" Dia., Factory-style sleeve (no O-rings)

View Instructions

A common problem in 700-R4 transmissions is burned bands and/or 3-4 clutches. This failure can be reduced by eliminating throttle boost oil leakage. The Sonnax replacement assemblies 77917-02K, 77917-03K, and 77917-04K eliminate these problems.

  • TV boost valve and sleeve are manufactured from hardened steel for better wear resistance.
  • Kits available in three sizes for .423", .471" and .500" diameters.
  • TV Boost Valve
  • TV Boost Sleeve
  • 77917 03k