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I need info on belt drive diffs and model to model compatibility for the Kyosho cars. Who is the expert in here?

I need to know if the Lazer ZXR diffs were offered in any other model.

I need to know the exact belt pitch. (3mm, but is it GT2 or HTD?)

Is there another diff that is similar enough to substitute the Lazer ZXR diff?

Anybody have the part numbers for the rear diff and front one way diff?

Thanks guys!!!

TF-2 diffs are the same, not sure about TF3 and 4 , 5 is different for sure.
I don't know the axact type, but the belts teeth are the same as on any tamiya or hpi car

All of the diff's up until at least the TF3 are interchangeable with the Lazer (spools too ). I think the TF4 diffs are as well but I'm not positive. Also, the Pure Ten series diffs are direct swaps. They're better too in that they're built like a Stealth diff with a separate diff nut and proper coil spring rather than the diff screw being threaded into the other outdrive and using bellville washers. They come up on Ebay once in a while.