USA Standard Gear Manual Transmission Synchro Sleeves ZMMUNWT297-15
Part Number: SPZ-S0012
USA Standard Gear Manual Transmission Synchro Sleeves
Manual Transmission Synchro Sleeve, Muncie, Steel, Natural, Each
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Estimated Ship Date: Nov 2, 2026 Would you rather pick it up?
Overview
USA Standard Gear Manual Transmission Synchro Sleeves
USA Standard Gear manual transmission synchro sleeves (also called sliders) are cylindrical internal-splined collars that slide over a synchronizer hub to lock a specific gear to a transmission mainshaft. They're machined from high-strength steel according to OEM factory specs for drop-in fitment. The sleeves are available for a variety of Buick, Bizzarrini, Chevrolet, Oldsmobile, and Pontiac vehicles from the 1960s and '70s.
Additional details:
* Torque transfer: Internal splines mesh with gear/hub assemblies to transmit rotational power when a gear is selected
* Shift engagement: Moves via the shift fork to complete the physical connection after friction rings match speeds
* Wear replacement: Replaces rounded, chipped, or worn factory slider teeth that cause jumping out of gear or grinding
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Some parts are not legal for use in California or other states with similar laws / regulations
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