{"product_id":"synchrotech-b-series-master-synchro-rebuild-kit","title":"Synchrotech B Series Transmission Synchro Master Rebuild Kit","description":"\u003cul\u003e\n\u003cli\u003eFitments for Most B Series Transmissions \u003c\/li\u003e\n\u003cli\u003eCompatible with B16A, B16B, B18C, B17A Transmissions \u003c\/li\u003e\n\u003cli\u003eComplete Synchro Rebuild Kit with Sleeves, Bearings, Springs, Synchros, and Seals \u003c\/li\u003e\n\u003cli\u003eAvailable in Carbon or Brass \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eSynchrotech B-Series Synchro Master Rebuild Kit - Carbon or Brass\u003c\/h3\u003e\n\n\u003cp\u003eIf your B-series grinds going into a gear, you've probably already adapted to it. You slow the shift down, you baby second, you double clutch without thinking. That's worn synchros, and it doesn't get better on its own. This Synchrotech master kit is the complete fix: synchros for every gear plus the springs, sleeves, bearings, and seals to rebuild it properly while it's apart. Available in brass for a factory-quality rebuild or carbon for a real performance upgrade.\u003c\/p\u003e\n\n\u003ch4\u003eWhich Part Do You Actually Need?\u003c\/h4\u003e\n\n\u003cp\u003eThree parts, three different symptoms. Match yours before you spend money.\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eSymptom\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eLikely Part\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGrinds going into gear\u003c\/td\u003e\n\u003ctd\u003eSynchro\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003ePops out of gear under load\u003c\/td\u003e\n\u003ctd\u003eSleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eBinds, feels notchy, or blocks out mid-shift\u003c\/td\u003e\n\u003ctd\u003eHub\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThis kit covers the first two, since it includes both synchros and slider sleeves. If you find worn hubs while you're in there, order those separately, because no synchro kit fixes a worn hub.\u003c\/p\u003e\n\n\u003ch4\u003eHow To Tell Your Synchros Are Done\u003c\/h4\u003e\n\n\u003cp\u003eA few reliable signs, and one test worth running.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIt grinds into one specific gear.\u003c\/strong\u003e The classic. If everything shifts clean except second, that's second gear's synchro. Isolated grinding almost always means an isolated problem.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDownshifts are worse than upshifts.\u003c\/strong\u003e This is the useful one. On an upshift, revs are falling naturally and the synchro gets help. On a downshift it has to drag the clutch disc and input shaft up to speed by itself. If the car upshifts quietly but grinds or refuses on a normal downshift, your synchros are worn.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIt's getting worse.\u003c\/strong\u003e Wear starts as slight notchiness and progresses to metal-on-metal grinding you feel in your hand.\u003c\/p\u003e\n\n\u003cp\u003eOne honest note: grinding can also come from a clutch that isn't fully disengaging or from low or wrong transmission fluid. Rule those out first, they're far cheaper to fix than pulling a transmission.\u003c\/p\u003e\n\n\u003ch4\u003eCarbon Or Brass?\u003c\/h4\u003e\n\n\u003cp\u003eBoth fix a grinding transmission. They suit different cars.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBrass\u003c\/strong\u003e is the OEM-style material and the right pick for most street cars. It restores factory shift feel, it's proven over decades, and it costs less. Refreshing a daily driver or a mostly stock B-series, start here.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCarbon\u003c\/strong\u003e is Synchrotech's Pro Series, using a full carbon composite lining built on carbon-carbon technology originally developed for aerospace. The material acts as a braking element during engagement, stopping the gear faster, which means less grind on high-rpm shifts and less wear on your sleeves and engagement teeth over time. If you shift hard, run track days, drag race, or make real power, this is the one.\u003c\/p\u003e\n\n\u003cp\u003eStraight talk on one point: carbon shifts better, but don't expect dramatically longer life than brass. You're paying for how it engages.\u003c\/p\u003e\n\n\u003ch4\u003eCheck Your Hubs Before You Order\u003c\/h4\u003e\n\n\u003cp\u003eThe most important advice on this page. Synchros work against your hubs and sleeves, and if those surfaces are worn, new synchros of any material won't fix your shifting. New carbon on a chewed-up hub is no better than new brass on a chewed-up hub.\u003c\/p\u003e\n\n\u003cp\u003eThe good news is this kit includes new slider sleeves, so half of that equation is handled. But inspect your hubs and your engagement teeth before you close it up. Sharp and clean means this kit transforms the shift. Rounded off means you need hubs too, and finding that out now is far better than after everything's back together.\u003c\/p\u003e\n\n\u003ch4\u003eWhat's In The Kit\u003c\/h4\u003e\n\n\u003cul\u003e\n    \u003cli\u003e1-5 synchros (carbon or brass, your choice)\u003c\/li\u003e\n    \u003cli\u003e1-5 synchro springs\u003c\/li\u003e\n    \u003cli\u003eBrass reverse synchro and spring\u003c\/li\u003e\n    \u003cli\u003e1-5 slider sleeves\u003c\/li\u003e\n    \u003cli\u003e5 shaft bearings\u003c\/li\u003e\n    \u003cli\u003e2 axle seals\u003c\/li\u003e\n    \u003cli\u003eInput seal\u003c\/li\u003e\n    \u003cli\u003eShift rod seal\u003c\/li\u003e\n    \u003cli\u003eNew dust boot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThat's a genuinely complete rebuild rather than a partial one. Everything that wears in there is covered, including the seals and the dust boot most kits leave you to source separately.\u003c\/p\u003e\n\n\u003ch4\u003ePick Your Transmission, Not Your Car\u003c\/h4\u003e\n\n\u003cp\u003eRead this carefully, because B-series transmissions vary considerably and the kits aren't interchangeable. Go by the transmission code on your case rather than by what the car is, especially on a swapped chassis where the gearbox may not be original to it.\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eTransmission\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eFits\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eCarbon\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eBrass\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eY80 \/ S80 \/ S4C \/ S21 \/ Y21\u003c\/td\u003e\n            \u003ctd\u003eEM1 Civic Si, 1994-2001 Integra GS-R and Type R\u003c\/td\u003e\n            \u003ctd\u003eSYN101\u003c\/td\u003e\n            \u003ctd\u003eSYN101B\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYS1 cable\u003c\/td\u003e\n            \u003ctd\u003e1992-1993 Integra GS-R\u003c\/td\u003e\n            \u003ctd\u003eSYN101-YS1\u003c\/td\u003e\n            \u003ctd\u003eSYN101B-YS1\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eY1 \/ S1 cable\u003c\/td\u003e\n            \u003ctd\u003e1989-1991 Acura Integra\u003c\/td\u003e\n            \u003ctd\u003eSYN103\u003c\/td\u003e\n            \u003ctd\u003eSYN103B\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eY2 \/ A1 \/ J1 cable\u003c\/td\u003e\n            \u003ctd\u003e1989-1991 Acura Integra\u003c\/td\u003e\n            \u003ctd\u003eSYN105\u003c\/td\u003e\n            \u003ctd\u003eSYN105B\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eY80 \/ S80 hydro\u003c\/td\u003e\n            \u003ctd\u003e1994-2001 Integra GS, LS, and RS\u003c\/td\u003e\n            \u003ctd\u003eSYN107\u003c\/td\u003e\n            \u003ctd\u003eSYN107B\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYS1 cable\u003c\/td\u003e\n            \u003ctd\u003e1992-1993 Integra LS\u003c\/td\u003e\n            \u003ctd\u003eSYN107-YS1\u003c\/td\u003e\n            \u003ctd\u003eSYN107B-YS1\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eThree Things That Catch People Out\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eGS-R and Type R take a different kit than GS, LS, and RS\u003c\/strong\u003e, even within the same 1994-2001 range, because the transmissions are different.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCable versus hydro matters.\u003c\/strong\u003e Know which actuation your gearbox uses before ordering, since several of these split on exactly that.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe 1989-1991 Integra takes two different kits\u003c\/strong\u003e depending on whether you've got a Y1\/S1 or a Y2\/A1\/J1. Same years, same car, different transmissions. Check the code on your case rather than guessing.\u003c\/p\u003e\n\n\u003ch4\u003eWorth Doing Once\u003c\/h4\u003e\n\n\u003cp\u003eGetting into a B-series transmission is the expensive part of this job, whether you're paying a shop or spending your own weekend. The parts are the cheap half by a wide margin. So while it's open, inspect everything and replace what's genuinely past spec rather than what you assumed was bad. That's how you close it up once and get the shift you were after.\u003c\/p\u003e\n\n\u003ch4\u003eWho Should Run This Kit\u003c\/h4\u003e\n\n\u003cp\u003eThis is for anyone whose B-series has started grinding and who's ready to fix it properly rather than driving around it. Refreshing a high-mileage transmission, building a gearbox during a swap, or upgrading a car that gets shifted hard. Check your transmission code carefully, inspect your hubs, pick brass or carbon based on how you actually drive, and get your shifts back.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e Honda and Acura B-series transmissions, see the table above. \u003cstrong\u003eMaterials:\u003c\/strong\u003e brass (OEM-style) or Synchrotech Pro Series carbon composite. \u003cstrong\u003eIncludes:\u003c\/strong\u003e 1-5 synchros and springs, brass reverse synchro and spring, 1-5 slider sleeves, 5 shaft bearings, 2 axle seals, input seal, shift rod seal, and dust boot. \u003cstrong\u003eImportant:\u003c\/strong\u003e select by transmission code, not by vehicle.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e1989 Acura Integra\u003cbr\u003e1990-1993 Acura Integra GS\/LS\/RS\u003cbr\u003e1992-1993 Acura Integra GS-R\u003cbr\u003e1994-2001 Acura Integra GS\/LS\/RS\u003cbr\u003e1994-2001 Acura Integra GS-R\u003cbr\u003e1997-2001 Acura Integra Type R\u003cbr\u003e1999-2000 Honda Civic Si\u003cbr\u003e1997-2001 Honda CR-V\u003cbr\u003e1994-1997 Honda Del Sol VTEC\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Synchrotech Transmissions","offers":[{"title":"EM1 Civic Si\/94-01 GS-R\/ITR (Y80\/S80\/S4C\/S21\/Y21) \/ Carbon","offer_id":46709539799074,"sku":"SYN-MK-SYN101","price":808.45,"currency_code":"USD","in_stock":false},{"title":"EM1 Civic Si\/94-01 GS-R\/ITR (Y80\/S80\/S4C\/S21\/Y21) \/ Brass","offer_id":46709539831842,"sku":"SYN-MK-SYN101B","price":750.7,"currency_code":"USD","in_stock":false},{"title":"92-93 Integra GS-R (YS1 Cable) \/ Carbon","offer_id":46709539864610,"sku":"SYN-MK-SYN101-YS1","price":808.45,"currency_code":"USD","in_stock":false},{"title":"92-93 Integra GS-R (YS1 Cable) \/ Brass","offer_id":46709539897378,"sku":"SYN-MK-SYN101B-YS1","price":750.7,"currency_code":"USD","in_stock":false},{"title":"89-91 Integra (Y1\/S1 Cable) \/ Carbon","offer_id":46709539930146,"sku":"SYN-MK-SYN103","price":692.95,"currency_code":"USD","in_stock":false},{"title":"89-91 Integra (Y1\/S1 Cable) \/ Brass","offer_id":46709539962914,"sku":"SYN-MK-SYN103B","price":635.2,"currency_code":"USD","in_stock":false},{"title":"89-91 Integra (Y2\/A2\/J1 Cable) \/ Carbon","offer_id":46709539995682,"sku":"SYN-MK-SYN105","price":692.95,"currency_code":"USD","in_stock":false},{"title":"89-91 Integra (Y2\/A2\/J1 Cable) \/ Brass","offer_id":46709540028450,"sku":"SYN-MK-SYN105B","price":635.2,"currency_code":"USD","in_stock":false},{"title":"94-01 Integra GS\/LS\/RS (Y80\/S80 Hydro) \/ Carbon","offer_id":46709540061218,"sku":"SYN-MK-SYN107","price":808.45,"currency_code":"USD","in_stock":false},{"title":"94-01 Integra GS\/LS\/RS (Y80\/S80 Hydro) \/ Brass","offer_id":46709540093986,"sku":"SYN-MK-SYN107B","price":750.7,"currency_code":"USD","in_stock":false},{"title":"92-93 Integra LS (YS1 Cable) \/ Carbon","offer_id":46709540126754,"sku":"SYN-MK-SYN107-YS1","price":808.45,"currency_code":"USD","in_stock":false},{"title":"92-93 Integra LS (YS1 Cable) \/ Brass","offer_id":46709540159522,"sku":"SYN-MK-SYN107B-YS1","price":750.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/synchrotech-b-series-transmiss_28p4.jpg?v=1788211209","url":"https:\/\/www.hybrid-racing.com\/products\/synchrotech-b-series-master-synchro-rebuild-kit","provider":"Hybrid Racing","version":"1.0","type":"link"}