My overview of the Mamba Max 5700

[glassdoctor]

Nothing wrong with the MM motors but 3s lipo on a 5700 is a pretty hot setup. A 4600 would be a much better match. If you get a Neu motor I would do some calcs to pick a good kv for your setup. Figure the final drive ratio and rpms expected, etc...

Your gear ratio doesn't sound too far off... should be about the same FDR as a regular 1/10 truck, but you do have 4wd and it's no doubt heavier than say a T4.