[larry]

I would like to toss in a few things I have seen, I have built hundreds of gearboxes over the last 25 years by far 99% street cars. Tom is totally correct about the shape of current available syncro rings and sliders, I have bought rings from many suppliers hoping for something good and am not real happy with any. I use ones from a certain supplier that are the closest in shape. The 4 varieties I have recently purchased vary by shape, Moly color, texture, bevel cuts or Not, and interior steel finish/color from each other. I have come across new rings with a very soft steel ring that gets gouged up by the lock and appeared they were not even that old. Some new rings just drop into the carrier, don't need to be slightly compressed when installing the snap ring. Basically every "Good used/checked" transaxle and transmissions we sell, I go though to be sure it will work well, that includes a new second gear syncro at the minimum along with some good used original parts. I have examined alot of them.

Back in the day real NOS Alfa syncros had a yellow dot. The first series repros were the yellow band and were good, everything now is plain. I have heard every story of who made what and who doesn't anymore. Hard to tell whats true, all I know is that we are left with low cost supplier, nobody will notice quality. Oh for the days of little orange boxes with some brown paper surrounding a shiny new ring.

For race boxes I currently lean toward using original used syncros, but takes a lot of cores to support that.

I usually recommend Shell Spirax, but I used lightweight shockproof in my 3.0 V6 105 GT at the track and It worked great, but my box has NOS rings from my stash.

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