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  • 2nd Clutch distress
  • 3rd Clutch distress
  • Low line rise
  • Low Reverse boost
  • Soft shifts


Worn and leaking boost sleeves


These replacement boost valve kits provide more sealing area. Sleeves and valves made from high-quality hardened steel to prevent excessive wear.

4T60, 4T60-E

Reverse & Modulated Line Boost Valve Kit
Part No. 84754-24K

Low ratio

View Instructions

Vehicles with 4T60 or 4T60-E transmissions often exhibit such problems as poor line rise, soft shifts, poor reverse boost, and/or 2nd and 3rd clutch distress. These problems can often be caused by worn and leaking boost sleeves. The OE boost valve spools have very narrow contact surfaces within the sleeves, which contribute to the leakage.

  • Sleeves and valves are made from high-quality, hardened steel to resist wear.
  • Valve spools have been lengthened considerably to provide more sealing area with the sleeves.
  • Kit includes replacement springs to provide proper calibration for the lengthened valve spools.
  • Kit allows replacement of all items together
  • Modulated Line Boost Valve
  • Modulated Line Boost Sleeve
  • Modulated Line Boost Spring
  • Reverse Boost Valve
  • Reverse Boost Sleeve
  • Reverse Boost Spring

September 30, 2005

Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits

Gregg Nader

Topics: Diagnostics And Theory Transmission

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  • 84754 24k combo
  • 84754 24k