Seller notes

Sonnax Shift Zip Kit 8L45-8L90-SHIFT-ZIP for GM 8L45 & 8L90 Transmissions Resolve shift-related issues in your GM 8L45 or 8L90 transmission with the Sonnax Shift Zip Kit. This innovative kit directly addresses the root causes of shifting complaints by sealing critical circuit pressure losses in the valve body. The kit includes uniquely engineered components designed to prevent pressure loss in the signal accumulator, clutch control, and 1-3-5-6-7 accumulator piston circuits. These targeted solut...

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