Durango Dex410 V4 gearing

[Scotty415]

I have a question about the dex410 v4 gearing. There is a few of us running this car with a speed passion pro 1.1 and 6.5t motor on a 87 spur and 20t pinion. The problem we are all having is the esc is thermaling in under 5 minutes can anyone suggest what gearing I should be using?

The tracks range from small indoor carpet tracks to outdoor astro tracks like Kidderminster and Telford.

Any help would be greatly appreciated