Synchrotech D Series Synchro Spring Set for 88-05 Civic

Synchrotech D-Series Synchro Spring Set - 1988-2005 Honda Civic

Springs are the part nobody thinks about and everybody should. They're what pushes the blocker ring against the cone to start the synchronizing action every time you shift, and when they weaken, the synchro can't engage firmly enough to do its job. You get a grind that feels exactly like a worn synchro even when the synchro itself still has material left. This is the complete 1-5 spring set for D-series transmissions.

Which Part Do You Actually Need?

Three parts, three different symptoms. Match yours before you spend money.

Springs live in that first row alongside the synchros, which is exactly why they're worth replacing together. Tired springs produce the same grind a worn synchro does, so putting new synchros in behind old springs means you've only fixed half the problem.

Always Replace Springs With Synchros

The practical advice worth the most on this page. If you've got the transmission open to do synchros, put fresh springs in at the same time.

They've been cycling and heating alongside everything else for the same number of years and the same number of shifts, so they're tired even if they look fine. On a Civic that's now anywhere from twenty to thirty-five years old, that's a lot of shifts.

Springs are the cheapest part in the whole assembly and among the most annoying to have to go back in for. Reusing them behind a fresh set of carbon or brass synchros is how a rebuild ends up feeling only slightly better than it did before.

Springs Alone, Or The Master Kit?

Worth deciding before you order.

Buy this set on its own if you've inspected the transmission and your synchros, sleeves, and bearings are genuinely still good. That happens, particularly on a lower-mileage car where the springs have simply lost tension with age.

If you're finding wear in more than one place, the D-series master rebuild kit includes these springs along with synchros, sleeves, bearings, and seals, and it works out cheaper than buying the pieces separately. Given the labor to get in there, most people going this deep end up wanting the full kit.

Match Your Case

Two versions, and the split is by transmission rather than by year alone.

Check the case ID on your transmission rather than going by model year, especially on a car that's been swapped or rebuilt at some point. On thirty-year-old Civics that's more common than not.

Fitment

1988-2000 Honda Civic with D15 or D16 (SP111)
2001-2005 Honda Civic EX and LX with D17 (SP113)

Complete 1-5 spring set. Select your application at checkout.

Who Should Grab This Set

This is for anyone with the transmission apart doing synchro work, and for the builder who understands that a rebuild is only as good as its weakest reused part. Springs are inexpensive, they're a known wear item, and they directly affect whether your new synchros actually engage the way they should. If you're in there, put them in.

Fits: 1988-2000 Honda Civic (D15 / D16, case ID L3, S20, S40) and 2001-2005 Honda Civic EX and LX (D17, case ID SLW). Part numbers: SP111 and SP113. Coverage: complete 1-5 set.