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.
Hardened steel valve matches OE material
PTFE seal eliminates cross leaking of converter signal oil and converter feed oil
Symptoms:
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.
Contents:
SONNAX Installation Instructions