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Ok, a while back I bought Fartpipe's busted up tranny and finally got around to rebuilding it.
So after tearing it all down I can see why he had problems getting into 4th gear. The synchronizer teeth are rounded pretty good. I am not sure if I should replace it or not. In the T-56 manual it says that this is normal.
The problem is I can't find a place that sells the 3-4 syncro. I bought the rebuild kit from Gearbox.com, and they have sycnro's for sale, but they only work on F-bodys and Vipers.
I ordered all my rebuild parts from there, they syncros for c5 are not on the website, but they do have them available and everything i ordered was in stock. BTW, rounded syncro teeth is not normal... my 1/2, 3/4 and 5/6 syncro were rounded, tranny sucked before and used to grind 2nd unless you were going 5 mph, shifts like butter now
I ordered all my rebuild parts from there, they syncros for c5 are not on the website, but they do have them available and everything i ordered was in stock. BTW, rounded syncro teeth is not normal... my 1/2, 3/4 and 5/6 syncro were rounded, tranny sucked before and used to grind 2nd unless you were going 5 mph, shifts like butter now
You've already gone through the trouble of tearing the tranny down... might as well fix it. You can buy the correct Corvette T56 parts from The Gearbox or RPM Transmissions.
Here is a pic of what the teeth on the slider should look like: