Symptoms:

  • No lockup
  • Falls out of lockup when hot
  • Fluid blown out fill tube
  • Lockup immediately after 2nd gear
  • 1-2, 2-3, 4-5 Flares

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.

Warning:

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

Identifying PWM vs. Non-PWM Units
If the OE valve features double spools at the location indicated here, you are working on a non-PWM unit. If the OE valve features one spool, you are working on a PWM unit and must use Sonnax TCC apply valve kit 77805E-K. Do not rely on the OE valve material (steel vs. aluminum) to determine for whether the unit is non-PWM, as some early PWM pumps also used steel TCC valves.

200-4R, 4L60, 4L60-E

TCC Apply Valve Kit
Part No. 77805-K

Fits non-PWM units only.

View Instructions Find a Distributor
  • Hardened steel valve matches OE material
  • PTFE seal eliminates cross leaking of converter signal oil and converter feed oil
  • Seal PTFE
  • Valve Steel
  • 200-4R, 4L60, 4L60-E TCC Apply Valve Kit 77805-K
  • 200-4R, 4L60, 4L60-E TCC Apply Valve Kit 77805-K
  • 200-4R, 4L60, 4L60-E TCC Apply Valve Kit 77805-K details