Tool Required

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Symptoms:
  • Code 39, 740, 1870
  • Falls out of lockup when hot
  • Low cooler flow
  • Overheated converter
  • Shudder
Cause:

Wear of the TCC apply valve bore allows leakage of TCC signal oil to exhaust and the apply valve to move into the TCC release position.

Correction:

Wear of the TCC apply valve bore allows leakage of TCC signal oil to exhaust and the apply valve to move into the TCC release position.

Tool Required

4T60, 4T60-E

Oversized TCC Apply Valve Kit

Part No.

84754-16K

Oversized TCC Apply Valve Kit
  • 84754-16k_combo

  • Oversized TCC Apply Valve Kit

  • 84754-16k-22k-97k-98k

Small_84754-16k_combo Small_84754-16k Small_84754-16k-22k-97k-98k

4T60, 4T60-E

Oversized TCC Apply Valve Kit

Part No. 84754-16K

  • Valve
  • PTFE Seal
  • Spring

'96-Earlier with steel valve

Complaint:

  • Code 39, 740, 1870
  • Falls out of lockup when hot
  • Low cooler flow
  • Overheated converter
  • Shudder

Cause:

Wear of the TCC apply valve bore allows leakage of TCC signal oil to exhaust and the apply valve to move into the TCC release position.


Correction:

Wear of the TCC apply valve bore allows leakage of TCC signal oil to exhaust and the apply valve to move into the TCC release position.

  • Material: Steel

The TCC apply valve acts as the switch valve for converter apply and release. The TCC regulator valve (84754-01K and 84754-08K) controls TCC apply pressure. Both the apply valve and the regulator valve can cause slip codes. When the apply valve is worn, it often returns to the un-apply position even though the TCC apply solenoid remains energized. Generally the apply valve causes larger changes in slip RPM as the converter cycles from apply to full release. The regulator valve causes a more gradual load and heat-sensitive slip. Check for changes in slip RPM with a scanner or changes in cooler flow with the Sonnaflow® FM-01KA.

  • PTFE seal prevents loss of signal oil that strokes the valve
  • Oversized versions available to restore thevalve body bore
  • Standard-size versions are drop-in replacements and do not require valve body removal
  • Tool kit services both early and late models
  • Patent No. 6,832,671

Required Tools

Related Parts

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