[_dV]

Thanks for the comments guys. It seems that for a vehicle of a certain weight with a motor of a set physical dimensions there will be a gearing range thats viable and that range can't be shifted much by altering motor kV or battery voltage.

I was hoping that my lighter build with lower kV motor and higher voltage batteries would be ok with the lower gearing. The motor has no probs moving the truck, it accelerates great but apparently the gearing is just too low for a motor that size.

So what to do. I'm gonna try going back close to the stock Flux gearing, using the same motor and using a 6s battery to keep the speed up. Had been considering using 6s for more efficiency and there seem to be more readily available options than 5s. I can fit almost any battery and it should only way about 100gm more. There are a few nice Turnigy\FlightMax options. For the spur I'd like to try a 65t mod 0.8 spur but a steel one isn't currently offered. I've posted in the Slipperential forum to see if Mike might provide one.

Wouldn't mind trying a larger motor as neil suggested but i would have to rejig the TVPs for the longer motor as there virtually no room at the back of it atm. Maybe later on when i have the CAD stuff complete and i can get them cut instead of having to remake by hand.

Least i have the suspension fairly well sorted. I went back to the original pink springs with tubes and 400 centistoke(40 wt) oil. Maybe a touch soft for large jumps but they seem like good general offroad settings.

Also found that there are diff fluids available between 100K and 500K. 300K looks like a good candidate.