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Synchrotech 89-01 B-Series 1-2 Sleeve
Part Number: SO-137

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Synchrotech 89-01 B-Series 1-2 Sleeve
Part Number: SO-137

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$173.20

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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.

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
1992 Acura Integra GS
1993 Acura Integra GS
1997 Acura Integra GS
1998 Acura Integra GS
1999 Acura Integra GS
2000 Acura Integra GS
2001 Acura Integra GS
1994 Acura Integra GS-R
1995 Acura Integra GS-R
1996 Acura Integra GS-R
1997 Acura Integra GS-R
1998 Acura Integra GS-R
1999 Acura Integra GS-R
2000 Acura Integra GS-R
2001 Acura Integra GS-R
1990 Acura Integra LS
1991 Acura Integra LS
1992 Acura Integra LS
1993 Acura Integra LS
1994 Acura Integra LS
1995 Acura Integra LS
1996 Acura Integra LS
1997 Acura Integra LS
1998 Acura Integra LS
1999 Acura Integra LS
2000 Acura Integra LS
2001 Acura Integra LS
1990 Acura Integra RS
1991 Acura Integra RS
1992 Acura Integra RS
1993 Acura Integra RS
1994 Acura Integra RS
1995 Acura Integra RS
1996 Acura Integra RS
1997 Acura Integra RS
1998 Acura Integra RS
1995 Acura Integra Special Edition
1996 Acura Integra Special Edition
1997 Acura Integra Type R
1998 Acura Integra Type R
2000 Acura Integra Type R
2001 Acura Integra Type R
Honda Civic
1999 Honda Civic Si
2000 Honda Civic Si
Honda Civic del Sol
1994 Honda Civic del Sol VTEC
1995 Honda Civic del Sol VTEC
1996 Honda Civic del Sol VTEC
1997 Honda Civic del Sol VTEC

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