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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.
Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
Acura Integra
1990 Acura Integra GS
1991 Acura Integra GS
1991 Acura Integra GS
1990 Acura Integra LS
1991 Acura Integra LS
1991 Acura Integra LS
1990 Acura Integra RS
1991 Acura Integra RS
1991 Acura Integra RS
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