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Product Details
| Part Number: | SO-137 |
| Brand: | SynchroTech |
Synchrotech SO-137 – Hardened 1st/2nd Gear Synchro Sleeve (B-Series, 1989–2001). A robust replacement sleeve for the 1st and 2nd gear synchro assembly, compatible with B-Series transmissions from 1989 to 2001. This component ensures reliable gear synchronization and smooth shifting, whether you're restoring or upgrading your transmission.
Features:
- Engineered for B-Series Gearboxes
- Tailored to replace the 1st/2nd gear synchro sleeve in B-Series Honda transmissions—specifically applicable to models housed in Y80, S80, YS1, Y21, S21, and S4C transmission cases spanning 1992-2001—and earlier variants from 1989-1991.
- Hardened Steel Construction: Constructed from durable hardened steel, this sleeve delivers enhanced wear resistance and strength—vital for maintaining synchro integrity under performance or track use.
- Precise OEM Replacement Fit: Machined to exact OEM specifications, this sleeve ensures seamless integration with stock or upgraded synchro components—requiring no modifications for installation.
- Cost-Efficient Repair Option: Ideal for addressing wear in high-stress gears without replacing entire synchro assemblies—saving both time and money. Offering strong value for replacement projects.
Fitment:
- 1st/2nd GSR ITR LS Civic Si
- 1992-2001 (Y80 S80 YS1 Y21 S21 S4C)
- 1989-1991 (Y1 S1 A1 J1 Y2 )
The Synchrotech SO-137 hardened sleeve is a direct-swap solution for worn or fatigued 1st/2nd gear synchro sleeves in 1989–2001 Honda B-Series transmissions. Its durable construction, OEM-fit engineering, and focused functionality make it an excellent choice for enthusiasts, rebuilders, and daily drivers alike.
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 |
| 1992 | Acura | Integra | GS |
| 1992 | Acura | Integra | LS |
| 1992 | Acura | Integra | RS |
| 1993 | Acura | Integra | GS |
| 1993 | Acura | Integra | LS |
| 1993 | Acura | Integra | RS |
| 1994 | Acura | Integra | GS-R |
| 1994 | Acura | Integra | LS |
| 1994 | Acura | Integra | RS |
| 1994 | Honda | Civic del Sol | VTEC |
| 1995 | Acura | Integra | GS-R |
| 1995 | Acura | Integra | LS |
| 1995 | Acura | Integra | RS |
| 1995 | Acura | Integra | Special Edition |
| 1995 | Honda | Civic del Sol | VTEC |
| 1996 | Acura | Integra | GS-R |
| 1996 | Acura | Integra | LS |
| 1996 | Acura | Integra | RS |
| 1996 | Acura | Integra | Special Edition |
| 1996 | Honda | Civic del Sol | VTEC |
| 1997 | Acura | Integra | GS |
| 1997 | Acura | Integra | GS-R |
| 1997 | Acura | Integra | LS |
| 1997 | Acura | Integra | RS |
| 1997 | Acura | Integra | Type R |
| 1997 | Honda | Civic del Sol | VTEC |
| 1998 | Acura | Integra | GS |
| 1998 | Acura | Integra | GS-R |
| 1998 | Acura | Integra | LS |
| 1998 | Acura | Integra | RS |
| 1998 | Acura | Integra | Type R |
| 1999 | Acura | Integra | GS |
| 1999 | Acura | Integra | GS-R |
| 1999 | Acura | Integra | LS |
| 1999 | Honda | Civic | Si |
| 2000 | Acura | Integra | GS |
| 2000 | Acura | Integra | GS-R |
| 2000 | Acura | Integra | LS |
| 2000 | Acura | Integra | Type R |
| 2000 | Honda | Civic | Si |
| 2001 | Acura | Integra | GS |
| 2001 | Acura | Integra | GS-R |
| 2001 | Acura | Integra | LS |
| 2001 | Acura | Integra | Type R |
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