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Product Details
| Part Number: | SO-Y1-3 |
| Brand: | SynchroTech |
Synchrotech SO-Y1-3 – Hardened 3rd/4th Gear Synchro Sleeve for B-Series (Cable Y1/S1, 1989–1991). This precision-engineered synchro sleeve is designed for the 3rd and 4th gear assembly in early cable-operated Honda B-Series transmissions (Y1 and S1 codes, 1989–1991). Crafted from hardened steel for exceptional strength and durability, it restores synchronization performance and smooth shifting in worn or high-mileage gearboxes.
Features:
- Application-Specific Fitment: Made specifically for cable-type B-Series manual transmissions coded Y1 or S1, covering model years 1989 through 1991.
- Robust Hardened Steel Construction: Built to withstand repeated gear engagement, this sleeve enhances longevity and protects internal components during aggressive or daily driving.
- OEM-Precision Engineering: Machined to exact factory specifications to ensure seamless installation and reliable gear alignment without modifications.
- Dimensions: The internal diameter of the synchro sleeve is approximately 50 mm, matching OEM syncro dimensions for a perfect fit.
Fitment:
- Cable B series 1989-1991 (Y1 S1)
- Note: 3-4 Synchro measures 50MM ID
The Synchrotech SO-Y1-3 synchro sleeve is a direct-replacement, hardened steel component tailored for 3rd/4th gear synchronization in 1989–1991 cable-operated B-Series transmissions (Y1 and S1 codes). Its OEM-level fitment, rugged construction, and budget-conscious pricing make it a smart choice for anyone aiming to restore shift feel or refresh worn transmission internals.
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
| Year | Make | Model | Trim |
|---|---|---|---|
| 1990 | Acura | Integra | GS |
| 1990 | Acura | Integra | LS |
| 1990 | Acura | Integra | RS |
| 1991 | Acura | Integra | GS |
| 1991 | Acura | Integra | LS |
| 1991 | Acura | Integra | RS |
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