From a dead stop when I put it to full throttle it slightly takes off to the left, why? Dosent do it all the time. Would a spool in the rear diff stop that?
is the trim adjusted pretty straight? If than thats just nature of the beast. What would solve it if the trim is adjusted is to add thicker diff fluid which slows down the time it takes for the diff to unload. I run 30k weight in the rear and 50k weight in the front. In the Pit pass section of the website there is a 4 part series on doing tunes and mods to the Revo. ALOT of good info.
"You just got passed by a Traxxas"
also try making sure that the camber on the wheels are equal
If you have ever crashed the truck and replaced the swing arm or a hub and even a toe link if it is not put back together at the same spot it will make the truck handle funny. Also if the tires are on back wards it can make the truck pull funny on things like pavement not so much on dirt but u might notice it.