Oversized B4 Release Valve Kit, for 55-50SN, 55-51SN, Sonnax Transmission
Oversized B4 Release Valve Kit, for 55-50SN, 55-51SN, Sonnax Transmission
Oversized B4 Release Valve Kit, for 55-50SN, 55-51SN, Sonnax Transmission

Oversized B4 Release Valve Kit, for 55-50SN, 55-51SN, Sonnax Transmission

  • Sale
  • $39.73
Hello, If you need assistance finding a part please supply the VIN number of your NORTH AMERICAN vehicle AND the part number you are looking for. 

Symptoms:

  • 2-3 Flare
  • 2-3 Neutral
  • 3-2 Harsh
  • 3-2 Neutral

Cause:

Bore wear causes the valve to stick and excessive end plug leakage alters valve timing.

Correction:

Valve hang-up is eliminated by reaming the bore and installing the Sonnax oversized valve, spring and end-plug. Valve timing is restored by reducing excess end plug leakage.

55-50SN, 55-51SN

Oversized B4 Release Valve Kit
Part No. 59947-26K

    REQUIRES TOOLING: F-59947-TL26
      REQUIRES VB-FIX: VB-FIX

  • Recalibrated spring restores OE shift quality.
  • Restores hydraulic integrity.
  • Hard coat anodized valve for increased durability.
  • Addresses a multitude of shift concerns.
  • Salvages valuable core.
  • Release Valve
  • Spring
  • End Plug
Found a lower price from a competitor? PLEASE LET US KNOW! By messaging us with a link or listing number from (for example) Amazon or eBay. We would like the opportunity to earn your business. Sometimes we can beat the competitor in price (sometimes we cannot). We will do our best to get you the lowest price around! 

SENDING A PART NUMBER IS REQUIRED!
._Thank you for looking!