Big Rock First Arrma good fan upgrade?

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Gearhead04

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Arrma RC's
  1. BigRock 4x4
First Arrma and just getting into the hobby looking for a good fan upgrade just looking for something to keep it cooler because our summers are pretty hot?
 
Corally makes excellent 30 & 40mm ultra highspeed fans.
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There are several other companies that make these exact same fans. Hypercool, Rocket and Surpass come to mind.
 
After a few good bash sessions blew out the rear diff so stripped the truck down to check everything over but got the new 2 fan setup on the motor waiting for the new pivot balls to get here so we can get it back out today and go break it again ill post pics after its back together

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All back together new pivot balls installed new rear diff and main gear and bearings new 2 fan set up ripped around great new pivot balls make it drive like a diffrent truck must have upgrad.

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