6L80 6L90 Pump Pressure Boost Valve Kit | Sonnax 104520-12K

6L80 6L90 Pump Pressure Boost Valve Kit | Sonnax 104520-12K

S45507ATK

34 in stock
$27.50
$27.50
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6L45, 6L50, 6L80, 6L90 Transmission High Performance

Boost Valve Kit

Part No. 104520-12K

Vehicles with listed GM transmissions may exhibit insufficient line rise in drive ranges, soft shifts and/or burnt clutches. These problems may be caused by continuous oscillation of the boost valve within the boost sleeve, creating excessive wear and a path for EPC fluid pressure to leak to exhaust. Sonnax boost valve kit 104520-12K has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control. The sleeve also has a slightly larger EPC feed orifice to provide quicker throttle response. A new pressure regulator valve outer spring is also included to replace weakened original springs and provides a modest 5 psi increase across the pressure curve.

  • Boost sleeve is manufactured from highly wear-resistant billet aluminum to prevent wear
  • Larger feed orifice provides quicker throttle response
  • Replacement spring provides modest 5psi line pressure increase
  • Drop-in Zip Valve™ parts install quickly and easily
  • Valve
  • Sleeve
  • Spring

Symptoms:

  • Low line rise in Drive
  • Soft shifts
  • Burnt clutches
    Cause:
    Wear of the boost valve sleeve allows EPC fluid pressure escape to exhaust.
    6L80 6L90 Pump Pressure Boost Valve Kit | Sonnax 104520-12K

    $27.50