The snap ring surprise

After more than 6 kmiles of track use, my 2nd gear began to scratch a bit on downshift. So I took the transmission out of the car and gave it to my mechanics to open it.

The bad surprise is that the snap ring had failed and I did not know it (no special noise or strange shifting). My transmission was is the snap ring range.

Most of the bearings have some play now. Is it a consequence of the broken snap ring ?

The good surprise is that nothing else broke or has been damaged. 1st and 5th synchros are like new. 4th, 3rd a 2nd synchros have a little wear (the most used on track). The sleeve set hub of gears 3-4 has some wear. The 3rd gear has some wear too (the teeth connecting to the sleeve).

So I will do :

- 2nd, 3rd and 4th synchros & springs
- snap ring
- all the bearings (mainshaft, countershaft, differential)
- oil seals
- sleeve set hub 3-4 (available in Japan)
- 3rd gear, if I can find it (23441-PR8-A02). I can only find the JDM short one on ebay.

Well you need new housing too. Sounds like the ring didn't shatter and haven't been chewed up.

solidol said:

Well you need new housing too. Sounds like the ring didn't shattered and got chewed up.

Click to expand...

Yep. Forgot that little detail

how many miles?

78'000 km / 50 kmiles (6-7 kmiles on the track). Seems classical.

Thanks for the pics... very helpful. What do you mean "began to scratch a bit"? Were you grinding gears?

Yes on downshift 3rd to 2nd at high rpm.

[MENTION=12617]asylum[/MENTION] It happened the same to me and since I was at it I replaced the clutch and the flywheel (lighter).My list of parts for the short gears was the following (ended up not replacing the Synchros)SPRING PLATE 41696-PR8-000Booth 83413-SL0-Z01ZACOUNTER 4th 23481-PR8-000MAIN 4th 23451-PR8-010BEARING Special 91122-PR8-008BEARING Angular 91004-PR8-008COUNTER 2nd 23431-PR8-010MAIN 3rd 23441-PR8-020Bearing Ball 91002-PR8-008COUNTER 3rd 23471-PR8-000SYNCHRONIZER 23651-PG1-000SYNCHRO 3 and 4 23641-PR8-911SYNCHRO 2nd 23646-PR8-020BLOCKING 23641-PR8-010SLEEVE 1-2 23619-PR8-010TAPER BEARING 91121-PR8-008SLEEVE 3-4 23621-PR8-010MAIN SHAFT 23210-PR8-020BEARING SPECIAL BALL 91003-PR8-008BEARING NEEDLE 91102-PR8-018BEARING NEEDLE 91103-PR8-018RING 5TH 23642-PG1-912RING REVERSE 23642-PR8-010SLEEVE 5TH 23624-PR8-020LEFT RECEIVER 81855-sl0-j22zaRIGHT RECEIVER 81455-sl0-j22zaI bought everything from amayama.com including the R&P.Also, since you track it, add the plate to the LSD to make it type R. I have an additional one that I bought by mistake if you need it.I hope it helps!Salut,Andre

Man the formatting on this forum is crap! Send me a PM and I will send you my excel.

No problem. I ordered the housing and the sleeve set hub 3-4 from Anayama. The USDM/EUDM 3rd gear is still available at Honda/Acura but it needs 2 weeks to come from Japan. Anayama only has the JDM 3rd gear. The other parts (bearings and synchros) were available from oemacuraparts. I already have the Giken LSD with the 4.4 final.

I received the case and the other parts.

"Memory" game of the day. The gearbox is in. I just had suicidal thoughts when I saw I forgot the clutch release fork and already put back some (a lot...) of bolts :biggrin::biggrin::biggrin:

Work completed. I tried to do all the shifts from 1 to 5 and back while suspended on the lift and everything seems fine. I hope everything will be ok on the first trackday. I also took the time to change a ball joint boot. What a mess to get the ball joint out of the suspension arm. It was a thread massacre.