• 2nd Clutch distress
  • 3rd Clutch distress
  • Low cooler flow
  • Low line rise
  • Low Reverse boost
  • Soft shifts
  • Converter shudder
  • Overheated converter
  • Code 39, 740, 1870
  • Falls out of lockup when hot


The Sure Cure® Kit
Part No. SC-4T60E

Fits '93–'96 units.

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Sonnax Sure Cure Kits combine the best Sonnax products into one box, offering rebuilders a convenient and cost-effective way to address common transmission problems. These kits simplify ordering, stocking and estimating job costs, and include easy-to-read, step-by-step instructions that cover the inspection and repair of the most critical areas of the unit, and even a reference list of rebuilding specifications.

This kit is fully compatible with '93-'96 units, which are identified by a steel TCC apply valve that will fit in a 15mm wrench. For '97 & later units with an aluminum TCC valve that will not fit inside 15mm wrench, use SC-4T60E-1.

  • 1-2 Roller Clutch Spring Kit
  • Thrust Washers (2) Differential Side Gear
  • Pump Slide Pivot Pin
  • Modulated Line Boost Valve Kit
  • Reverse Boost Valve Kit
  • TCC Regulator & Isolator Valve Kit
  • Oversized TCC Apply Valve Kit
  • Checkball .375" Dia.
  • Checkballs (9) .250" Dia.
  • Shim Input Clutch Hub .010"
  • Shim Input Clutch Hub .020"
  • Shim Differential Carrier-to-Case
  • Retainer Clip Boost valve

  • 4T60-E The Sure Cure® Kit SC-4T60E

Sonnax Sure Cure® Kits

Comprehensive Kit for Big Problems You Don't Want Back

Knowing exactly what parts to replace in troublesome transmissions is an ever-increasing challenge, but Sonnax Sure Cure kits solve this problem for you. Each kit is a comprehensive reconditioning package featuring the best Sonnax products developed to help rebuilders restore and enhance transmission performance.

Learn More about Sonnax Sure Cure Kits