The only undersize ones I know of are bronze and are $150.00 each. It's an alternative if you have coning and don't want to spend $800.00 for the entire gear cluster if you can get the clearance you need.
In this picture you see the Bronze synchro on the top, followed by the dog teeth and then the gear. I am checking clearance.
You want the .40+ clearance between the synchro ring and the dog teeth.
The only options to fix a coning gear other than a undersize synchro, is sending the gear and dog teeth out for re-surfacing, I know someone that does it, or buying a total gear cluster for around $800.00.
If the coning is to bad, the undersize synchro won't fix the problem.
I ended up with a little to much coning on second gear after all said and done. I ended up with maybe .32 clearance hoping this was going to be enough. Now that it's back in the car, the ZF shifts way better than it did before, but I can still feel timing isn't quite right when going into 2nd too fast, up or down, specially down shifting.
Next summer I'll pull it again, disassemble it and send 2nd gear out for resurfacing or buy the complete cluster.
Had enough this year with it.
quote:Originally posted by 4NFORD:
What is the difference between using undersized synchros vs. normal sized ones? Is it to compensate for other worn components?
