Upgrading your GM 8L90 transmission with a billet input shaft is one of the most effective ways to add strength and reliability. Our 8L90 transmission billet shafts are precision-machined from 300M alloy steel and heat treated for exceptional durability. Designed as a drop-in replacement, these shafts come complete with sealing rings pre-installed, eliminating the need for additional tools or installers. FREE UPS Ground to the contiguous United States (lower 48)
When rebuilding or upgrading a transmission, one of the most common wear areas is the accumulator bore. The accumulator piston is essential for maintaining proper hydraulic integrity and shift quality. Sonnax offers a drop-in signal accumulator piston kit that reconditions worn bores quickly and easily — with no reaming required.
This complete set restores performance, prevents leakage, and ensures long-term reliability. FREE UPS Ground to the contiguous United States (lower 48) if purchased with a Kit. USPS Priority Mail if purchased separately.
