ORIGINAL: YHR
Yes it is all about the gear ratio. Has nothing much to do with the RX 18. I have an RX 18 powering a Tamiya Sherman Gearbox, and it has no issues.
Have to disagree here the difference between my panther running the rx18 and the tamiya dmd t-03 is huge. Now im not sure if this is due to using the HL tx or whether the using a dbc would improve things.