Symptoms:

  • Slips in Forward & Reverse
  • Delayed engagement
  • Poor shift quality
  • Harsh engagement

Cause:

Cast aluminum accumulator bore wear allows apply oil to exhaust.

Correction:

Sonnax anodized aluminum forward/reverse accumulator piston kit incorporates an O-ring for positive sealing and annular grooves for better centering and wear prevention.

UA80E, UA80F, UB80E, UB80F

Forward/Reverse Accumulator Piston Kit
Part No. 168740-05K

Fits either of two locations.

You need this if... View Instructions Find a Distributor

Wear at the accumulator bores or on the accumulator piston critical diameters in listed Toyota/Lexus units is very common. Wear allows clutch apply oil to exhaust, resulting in harsh or delayed forward engagements, or slipping and flares in forward gears. Sonnax forward/reverse accumulator piston kit 168740-05K incorporates an O-ring for positive sealing, even in worn bores.

  • O-Ring provides positive seal, even in worn bores
  • Annular grooves provide better piston centering and wear prevention
  • Hardcoat anodized aluminum piston combats premature wear
  • Drop-in Zip Valve parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Piston
  • O-Rings (2) 1 Extra

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Toyota/Lexus UA80E/F, UB80E/F Valve Body Layout

Toyota/Lexus UA80E/F, UB80E/F Valve Body Layout
  • UA80E, UA80F, UB80E, UB80F Forward/Reverse Accumulator Piston Kit 168740-05K
  • UA80E, UA80F, UB80E, UB80F Forward/Reverse Accumulator Piston Kit 168740-05K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

UA80E, UA80F, UB80E, UB80F Forward/Reverse Accumulator Piston Kit Vacuum Test Locations