Hello everyone... some of you may know me already, I am relatively new to Nitro Revos.
I recently acquired a 2.5R that I upgraded to a 3.3. I replaced a few parts: Rebuilt front differential, new EZ start motor, new air filter... a few other parts. Anyway I followed the Traxxas DVD for breaking in a motor. After break in tuned the engine. Everything seemed to be going well.
My first time taking it out of my yard after break in, I took it to a local skate park. I wanted to jump the ramps and such. Things went great... Revo performed as expected. While there I spotted an area where large mounds of baseball diamond sand/dirt had been dumped. Driving it through the high grass I noticed that it seemed a bit sluggish. Didnt pay much attention to it. Got to the mounds and I noticed again that it seemed like it didnt want to go.... it growled a lot (revved) but barely moved. Reverse works awesome...quite fast, but forward it creeped even though the engine was revving loudly.