TCC APPLY VALVE KIT 4L60E PWM
# 37781K

TCC Apply Valve with Teflon Seal For PWM Pumps

TCC APPLY VALVE KIT 4L60E PWM

Warning:
This part only fits PWM units, and mismatching PWM and non-PWM valves will cause rapid converter failure.

Symptoms:

  • No lockup
  • Code 894, 1870
  • Falls out of lockup when hot
  • Fluid blown out fill tube
  • Lockup immediately after 2nd gear

Cause:
Excessive pump bore-to-valve clearance allows TCC signal oil to leak past the spool, preventing lockup or causing lockup to disengage when hot. Additionally, converter feed can leak past the excessive clearance, combine with signal oil and cause premature lockup.

Correction:
These improved TCC apply valves with PTFE seals will eliminate bore cross leakage.


  • Updated stroke pressure eliminates TCC drift on apply and updated exhaust control
  • PTFE seal eliminates cross leaking of converter signal oil and converter feed oil
  • Sonnax kit works in both early- and late-style PWM pumps when used with included spring

Contents:

  • Valve Aluminum
  • Seal PTFE
  • Spring

SONNAX Installation Instructions

Type of Product: Sundry Parts
Qty Needed:
Years:
Alternative #:
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