Atb117

I've read up on the 2nd gear grind and know it's a common issue. But I didn't see much about 2nd gear being "locked out" afterward.

I have a MY05 and occasionally get the 1-2 grind at 3-3.5k shifts. But an even bigger issue is at 8k rpms and 1-2 grinds, then second gear becomes "locked out" and I have to wait for the tranny to cool down a bit before I can even budge it into 2nd, or 1st for that matter. One day it happened and I had to put the car in 3rd because 1st and 2nd were locked out. If I let the tranny cool for a few hours, 1st and 2nd become "unlocked". I switched to Redline MT-90 4k miles ago and it helped for a while, but now the problem has returned. So I'm thinkin the issue is going to be something more expensive than buying new tranny fluid.

ahrmike

Check your clutch fluid + bleed your system. Thats your best bet, if that doesnt fix it; your synchros are probably toast. Try rev-matching to get it into the right gear instead of banging it in.

lotus7racer

Ikey is right, it could be a worn sychro.

But things you can do:
Try to replace the clutch fluid and bleed it good.
If MT-90 can't fix it, try other fluid such as sychromesh oil.
If not, time to open and replace it. Avoid slamming it next time.

Mike21

if your transmission is only locked out of 1st and 2nd gear, you clutch fluid is fine. replace your transmission fluid and see if that helps. clutch fluid should have nothing to do with it.
if it grinds when shifting into 2nd at 3k-3.5k rpm, your synchros are probably done.

1Sik_s2k

had the same problem recently... took it into honda and my 1-2 syncros were bad.. had them replace under warrenty along with 1-2 countershafts.. car shifts like butter now

Saki GT

Poor shifting leads to worn out syncros - I'd look at how your shifting and see if you need to modify it for the car.

esmith51

Swap trans fluids again. Try the synchromesh. Didn't Honda make some kind of change to their MTF? Many factors play into shifting smoothly, from timing, to seat position etc. Try adjusting some of those to reduce any problems. The S transmission, like many sports cars isn't designed to be constantly power shifted over and over. In my opinion, its one of the best designed transmissions for a true driver's car.
'

zachismisitok

sounds like a syncro problem to me as well- I had it on my last car at 40k except it would pop out of gear on me

Atb117

thanks for all the help guys. I'm gonna try new fluid and pay attention to how I'm shifting and if that doesn't do it, then I'm gonna have the tranny pulled.

tlee1234

How many miles on your car/ tranny?