{"product_id":"synchrotech-transmissions-d-series-synchro-master-rebuild-kit-d15-d16","title":"Synchrotech D Series Transmission Synchro Master Rebuild Kit","description":"\u003cul\u003e\n\u003cli\u003eCheck Your Speedo Gear Color And Size \u003c\/li\u003e\n\u003cli\u003eCarbon Or Brass, Your Choice \u003c\/li\u003e\n\u003cli\u003eComplete Kit With Sleeves And Seals \u003c\/li\u003e\n\u003cli\u003eFitments for D15, D16, and D17 Transmissions \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 D-Series Synchro Master Rebuild Kit - Carbon or Brass\u003c\/h3\u003e\n\n\u003cp\u003eIf your D-series grinds going into a gear, the synchros are worn and it isn't going to improve on its own. This Synchrotech master kit is the complete fix: synchros for every forward gear plus the springs, sleeves, bearings, and seals to rebuild it properly while the case is open. Available in brass for a factory-quality rebuild or carbon for a real performance upgrade.\u003c\/p\u003e\n\n\u003ch4\u003eCheck Your Speedo Gear Before Anything Else\u003c\/h4\u003e\n\n\u003cp\u003eHere's the thing that determines which kit you need, and it's easier to check than it sounds.\u003c\/p\u003e\n\n\u003cp\u003eD-series transmissions share a great deal in common with each other. What differs between them is the \u003cstrong\u003espeedo gear bearing size and color\u003c\/strong\u003e, and that's what separates the variants on this page.\u003c\/p\u003e\n\n\u003cp\u003eTwo things to note when you look:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eColor:\u003c\/strong\u003e white or black\u003cbr\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 35mm or 40mm\u003c\/p\u003e\n\n\u003cp\u003eGenerally, the DX and LX cars run a white 35mm gear while the EX and Si cars run a black 40mm. But go by what's actually in your transmission rather than by the badge on your car, especially on anything that's been swapped, rebuilt, or assembled from parts over the last thirty years. These cars have been apart more than most.\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 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 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, and it costs less. On a D-series that's mostly stock and mostly driven, 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. If you shift hard, run track days, drag race, or have built the engine, 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\u003eThis 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 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\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\u003c\/ul\u003e\n\n\u003ch4\u003eFind Your Kit\u003c\/h4\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eTransmission \/ Speedo Gear\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\u003eL3 \/ S20, white 35mm speedo gear\u003c\/td\u003e\n            \u003ctd\u003e1989-1995 Honda Civic DX and LX\u003c\/td\u003e\n            \u003ctd\u003eSYN111-D15\u003c\/td\u003e\n            \u003ctd\u003eSYN111B-D15\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eS40, white 35mm speedo gear\u003c\/td\u003e\n            \u003ctd\u003e1996-2000 Honda Civic DX and LX\u003c\/td\u003e\n            \u003ctd\u003eSYN111-D15-S40\u003c\/td\u003e\n            \u003ctd\u003eSYN111B-D15-S40\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eL3 \/ S20, black 40mm speedo gear\u003c\/td\u003e\n            \u003ctd\u003e1989-1995 Honda Civic EX and Si\u003c\/td\u003e\n            \u003ctd\u003eSYN111-D16\u003c\/td\u003e\n            \u003ctd\u003eSYN111B-D16\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eS40, black 40mm speedo gear\u003c\/td\u003e\n            \u003ctd\u003e1996-2000 Honda Civic EX\u003c\/td\u003e\n            \u003ctd\u003eSYN111-D16-S40\u003c\/td\u003e\n            \u003ctd\u003eSYN111B-D16-S40\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSLW\u003c\/td\u003e\n            \u003ctd\u003e2001-2005 Honda Civic (D17)\u003c\/td\u003e\n            \u003ctd\u003eSYN113\u003c\/td\u003e\n            \u003ctd\u003eSYN113B\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eSelect your material and transmission at checkout.\u003c\/p\u003e\n\n\u003ch4\u003eTwo Things That Catch People Out\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe 1996 changeover.\u003c\/strong\u003e Honda moved from the L3\/S20 transmissions to the S40 for 1996, so a 95 and a 96 Civic with the same trim take different kits. Check your year carefully.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTrim doesn't always match reality.\u003c\/strong\u003e The DX\/LX versus EX\/Si split lines up with the speedo gear on an untouched car, but plenty of these have had transmissions swapped over the decades. Look at the gear itself rather than trusting the badge.\u003c\/p\u003e\n\n\u003ch4\u003eWorth Doing Once\u003c\/h4\u003e\n\n\u003cp\u003eGetting into a D-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.\u003c\/p\u003e\n\n\u003ch4\u003eWho Should Run This Kit\u003c\/h4\u003e\n\n\u003cp\u003eThis is for anyone whose D-series has started grinding and who's ready to fix it properly, and for the builder going through a transmission during a swap or a refresh. These cars are thirty-plus years old now and the synchros in them have done a lot of shifting. Check your speedo gear, inspect your hubs, pick brass or carbon based on how you drive, and get your shifts back.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 1989-1991 Honda Civic, 1992-1995 Civic DX, EX, LX, and Si, 1996-2000 Civic DX, EX, and LX, 2001-2005 Civic DX, EX, and LX. See the table above for the correct kit. \u003cstrong\u003eMaterials:\u003c\/strong\u003e brass (OEM-style) or Synchrotech Pro Series carbon composite. \u003cstrong\u003eIncludes:\u003c\/strong\u003e 1-5 synchros, springs, and slider sleeves, 5 shaft bearings, 2 axle seals, and input seal. \u003cstrong\u003eImportant:\u003c\/strong\u003e select by transmission and speedo gear, not by vehicle trim.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e1989-1991 Honda Civic DX\/EX\/LX\/Si\u003cbr\u003e1992-1995 Honda Civic DX\/EX\/LX\/Si\u003cbr\u003e1996-2000 Honda Civic DX\/EX\/LX\u003cbr\u003e2001-2005 Honda Civic DX\/EX\/LX\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":"89-95 Civic DX\/LX (L3\/S20 White 35mm Speedo Gear) \/ Carbon","offer_id":46736834527266,"sku":"SYN-MK-SYN111-D15","price":508.15,"currency_code":"USD","in_stock":false},{"title":"89-95 Civic DX\/LX (L3\/S20 White 35mm Speedo Gear) \/ Brass","offer_id":46736834560034,"sku":"SYN-MK-SYN111BD15","price":444.62,"currency_code":"USD","in_stock":false},{"title":"96-00 Civic DX\/LX (S40 White 35mm Speedo Gear) \/ Carbon","offer_id":46736834592802,"sku":"SYN-MK-SYN111D15S40","price":508.15,"currency_code":"USD","in_stock":false},{"title":"96-00 Civic DX\/LX (S40 White 35mm Speedo Gear) \/ Brass","offer_id":46736834625570,"sku":"SYN-MK-SYN111BD15S40","price":444.62,"currency_code":"USD","in_stock":false},{"title":"89-95 Civic EX\/Si (L3\/S20 Black 40mm Speedo Gear) \/ Carbon","offer_id":46736834658338,"sku":"SYN-MK-SYN111-D16","price":508.15,"currency_code":"USD","in_stock":false},{"title":"89-95 Civic EX\/Si (L3\/S20 Black 40mm Speedo Gear) \/ Brass","offer_id":46736834691106,"sku":"SYN-MK-SYN111BD16","price":444.62,"currency_code":"USD","in_stock":false},{"title":"96-00 Civic EX (S40 Black 40mm Speedo Gear) \/ Carbon","offer_id":46736834723874,"sku":"SYN-MK-SYN111D16S40","price":508.15,"currency_code":"USD","in_stock":false},{"title":"96-00 Civic EX (S40 Black 40mm Speedo Gear) \/ Brass","offer_id":46736834756642,"sku":"SYN-MK-SYN111BD16S40","price":444.62,"currency_code":"USD","in_stock":false},{"title":"01-05 Civic D17 (SLW) \/ Carbon","offer_id":46736835018786,"sku":"SYN-MK-SYN113","price":635.2,"currency_code":"USD","in_stock":false},{"title":"01-05 Civic D17 (SLW) \/ Brass","offer_id":46736835051554,"sku":"SYN-MK-SYN113B","price":571.67,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SYN-MK-SYN111-D15_47cg.jpg?v=1788279516","url":"https:\/\/www.hybrid-racing.com\/products\/synchrotech-transmissions-d-series-synchro-master-rebuild-kit-d15-d16","provider":"Hybrid Racing","version":"1.0","type":"link"}