Synchrotech Synchro Spring Set for 17-21 Civic Type R FK8

Synchrotech Synchro Spring Set - 2017-2021 Honda Civic Type R (FK8)

The synchro springs are a part almost nobody thinks about, and they really should. Every time you shift, one of them is what pushes the blocker ring into the cone to get the synchronizing started, so once a spring goes weak it can't push hard enough and the synchro never really grabs the cone. You end up with a grind, and the frustrating thing is that it feels just like a worn synchro even when your synchros still have tons of material left on them. This Synchrotech set is those springs for the FK8 Civic Type R six-speed, and it comes as a 1st-4th set or the full 1st-6th.

Which Part Do You Actually Need?

There are really three different parts that can fail in here, and each one tends to show up as its own symptom, so it's worth working out which one you've actually got before you go spending money:

• Grinds going into gear - synchro (and springs)
• Pops out of gear under load - sleeve
• Binds, feels notchy, or blocks mid-shift - hub

The springs sit right there in that first row next to the synchros, and that's exactly why you want to do them together. A tired spring ends up grinding in the exact same way a worn synchro does, so if you go and install fresh synchros behind the old springs, you've really only gotten halfway to fixing the thing. The annoying half is still in there.

Always Replace Springs With Synchros

If you take one thing away from this page, make it this one. If you've already got the transmission open to do the synchros, honestly the springs should just go in at the same time while you're right there. They've been sitting in there heating up and cooling down on every single drive for just as long as the synchros have, so even if they still look okay they're worn out right along with everything else. They're also just about the cheapest thing in the entire assembly, which makes it kind of painful to imagine tearing the gearbox back open down the road only because you left the old ones in. If you go and reuse the tired old springs behind a brand-new set of synchros, the rebuild tends to come out feeling only a little better than it did when you started, which is a letdown after all that work. Don't do that to yourself.

Choose Your Set: 1st-4th or 1st-6th

Match the set to the work you're doing.

• 1st-6th set (SYN-SP-FK8): this one covers every gear from 1 through 6, and it's what you want for a full rebuild or any time you'd rather freshen the whole box than leave 5th and 6th riding on their old springs.
• 1st-4th set (SYN-SP-FK8A): this one covers the bottom four gears, which is where the grinding usually shows up anyway, since first through fourth take the hardest launches and the biggest rpm drops. If your grind is down in the lower gears, this is all you need.

If you're already in there for a full synchro job, just get the 1-6. The springs barely cost anything, and trust me, you really don't want to be pulling the case back apart a few months from now just because you decided to skip the last two gears.

Fitment

• 2017-2021 Honda Civic Type R (FK8)

Fits the six-speed manual transmission in the 2017-2021 Honda Civic Type R (FK8).

Who Should Grab This Set

If you've got the transmission apart for synchro work, this is for you, and so is any build where you get that the whole thing is only as good as the worst part you decided to reuse. Springs are a known wear item that barely costs anything, and they honestly end up being what decides whether those fresh synchros you just paid for actually grab the way they're supposed to. You're already in there with everything apart, so you may as well just put them in.