DESCRIPTION & SPECS

GM 8L45 and 8L90 transmissions often suffer burnt clutches, shift concerns, low line pressure and/or converter apply complaints due to excess wear in the signal accumulator piston bores in the control solenoid valve body casting. This wear allows valuable VFS signal pressure to exhaust, preventing proper shift control, line pressure regulation, and/or converter clutch apply.The Sonnax drop-in signal accumulator piston kit 154740-06K allows bores to be reconditioned quickly and easily with no reaming required. The hydraulic integrity of the VFS signal pressure circuits are re-established, and future wear prevented with positive sealing and wear resistant components. Hardcoat anodized aluminum piston combats premature wear Annular grooves to reduce wear rate Highly wear-resistant sleeve to prevent future wear Positive sealing O-ringed plug prevents leakage in already worn bores Mating spring to re-establish OE dampening action Drop-in Zip Valve™ parts install quickly and easily

Piston Kit; Accumulator, Includes:

• Sleeve (4)
• Piston (4)
• Spring (4)
• O-Rings (6)
• 2 Extra End Plugs (4)

TRANSMISSIONS
NAME YEARS
8L90 2015 - 2021
8L45 2016 - 2021

VEHICLE FITMENT
YEARS VEHICLE DRIVE TYPES
2015 - 2017 Cadillac Escalade ESV RWD, 4WD
2015 - 2017 Cadillac Escalade RWD, 4WD
2016 - 2019 Cadillac CTS AWD, RWD
2016 - 2018 Cadillac CT6 AWD, RWD
2020 - 2021 Cadillac CT4 AWD, RWD
2016 - 2019 Cadillac ATS AWD, RWD
2015 - 2021 Chevrolet Silverado 1500 RWD, 4WD
2017 - 2021 Chevrolet Express 3500 RWD
2017 - 2021 Chevrolet Express 2500 RWD
2015 - 2019 Chevrolet Corvette RWD
2017 - 2021 Chevrolet Colorado RWD, 4WD
2016 - 2021 Chevrolet Camaro RWD
2015 - 2017 GMC Yukon XL RWD, 4WD
2015 - 2017 GMC Yukon RWD, 4WD
2015 - 2021 GMC Sierra 1500 RWD, 4WD
2017 - 2021 GMC Savana 3500 RWD
2017 - 2021 GMC Savana 2500 RWD
2017 - 2021 GMC Canyon RWD, 4WD

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