8L90 8L45 1-3-5-6-7 Accumulator Piston Kit Sonnax Number 154740-15K

$ 28.00


8L90 8L45 1-3-5-6-7 Accumulator Piston Kit Sonnax Number 154740-15K.

In GM 8L45 and 8L90 transmissions, the 1-3-5-6-7 accumulator piston is utilized during apply of the 1-3-5-6-7 clutches to smooth engagement. Wear at this bore allows 1-3-5-6-7 clutch apply oil to exhaust resulting in ratio codes, harsh or delayed application of the clutch pack, burnt clutches and slipping/flares. Installing Sonnax 1-3-5-6-7 accumulator piston kit 154740-15K eliminates leaks to restore normal shift operation and feel.

  • O-Ring incorporated for positive sealing, even in worn bores
  • Hardcoat anodized aluminum piston combats premature wear
  • Drop-in Zip Valve parts install quickly and easily

    • Piston
    • O-Rings (2) 1 Extra
    • Spring
    • Washer


    • Clutch slippage
    • Burnt clutches
    • Flare shifts
    • Ratio codes


    Wear at the accumulator piston bore allows clutch apply oil to exhaust.


    Restore hydraulic control by installing Sonnax drop-in 1-3-5-6-7 accumulator piston kit with O-ring for positive sealing in worn bores.

Additional information

Weight 1 lbs
Dimensions 4 × 4 × 2 in