here's the story... i have a spare transmission sitting in my backyard with a bad reverse.. but the thing is the 1-5 syncros are perfectly fine.. i was wondering if the usdm syncros from a h22a1 tranny would work in my m2a4?

 

I know that when I fixed an m2b4 I ordered parts for a M2F4 and it was exactly the same. But they weren't syncros. But I would just try it. I'm about 98% sure that it will be fine as long as you assemble everything perfectly.