i need a new project

[Patrick]

Yeah, the diff ratio in truggy's is usually 4.3:1.
I couldn't say for sure what the stock XT8 spur is. I think tallyram had a steel 48t spur on his, so maybe 48t is stock? I guess you'll find out once you get it, but 2t on the spur gear won't make that much difference, maybe 1.5mph.

I think that gearing is a good place to start.