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Symptoms:

  • Overheated fluid & TCC lining
  • Repeated clutch failure
  • Soft shifts & poor line rise

Cause:

  • Worn parts, soft OE calibration 
  • Low converter charge pressure
  • Worn parts, accumulated clearances

Correction:

Restore worn parts, prevent common problems and increase performance levels by installing Sonnax Performance Pack.

4R100

Performance Pack
Part No. HP-4R100-01


View Instructions

Sonnax kit SC-4R100HD has been discontinued and replaced by the HP-4R100-01 Performance Pack.

Formerly a popular Sure Cure® option, this heavy-duty kit for Ford 4R100 units has been further refined to become a Performance Pack.

This kit offers innovative, heavy-duty calibration for firmer shifts under load without sacrificing low-speed drivability. Precision components upgrade the 4R100 for maximum performance and durability by recalibrating pressures and shift accumulation. Durable, improved parts target commonly worn areas in the transmission to repair damage and prevent future wear and tear.

  • Recalibrated shift accumulation, with tunability for great HD shifts
  • Improved accumulator valves for greater clutch durability
  • Improved pump components to minimize leaks and maintain pressure, TCC performance and lube
  • Sure Lock overdrive retaining ring prevents loss of 4th
  • Includes internal parts for setup and to prevent common failures

This year I have installed 4 of the HP-4R100-01 kits and have been so satisfied with the reaction of my customers that I installed one in my own truck. Great product! Thanks Sonnax!

D. Grenfell
  • 1-2, 2-3 & 3-4 Accumulator Control Valve Kits
  • Heavy Duty Low/Reverse Modulator Sleeve Kit
  • Line Pressure Booster Kit
  • Line-to-Lube Pressure Regulator Valve
  • TCC Control Plunger Valve Kit
  • Front Lube/Drainback Valve Kit
  • Line Pressure Modulator Plunger Valve Kit
  • One-Piece Rear Case Bushing
  • Center Support Gasket
  • Intermediate & Direct Clutch Feed Seal Kit
  • High Radius Relief Valve
  • Rear Planet Endplay Shims (2)
  • Performance Rated Accumulator Springs Green Springs (2), Yellow Springs (2), Red Springs (3), Non-Painted Springs (3)
  • Sure Lock Overdrive Spiral Snap Ring

March 09, 2016

Transmission Report: U341E/F TCC Slip Diagnosis

Topics: Transmission Report Newsletters Transmission Toyota/Lexus U341F Transmission U341E Transmission

Read Now

  • Hp 4r100 01

Sonnax Performance Packs

The Best Parts for Performance & Heavy Duty Recalibration

Performance enthusiasts look to Sonnax when building stronger, faster, more reliable transmissions. Performance Packs combine key Sonnax performance and heavy duty parts into powerhouse kits which take transmissions to the next level.

Learn More about Sonnax Performance Packs