HELP!!!! traxxas nitro sport just do donuts

[xengxue]

ok so I upgraded my .15 engine to the traxxas 3.3r...but when I'm on dirt all it does it donuts. why? its ok when I drive on asphalt itll go in a straight line no problem only happens when I'm on dirt. so can anyone help me with this problem.

 

[Nitrotrout]

I'll take a guess and say the rear diff broke?

 

[Rolex]

Yeah, I tend to agree. I think all your drive is only going to one wheel.

 

[ninnon]

I'm in agreement with the others- or your tires just aren't getting any grip on dust.

or your subconsciously doing them yourself.....
(It's happenned to me before)

 

[xengxue]

Diff isn't broken everything is still in tact. Tires are the stock tires when I got the truck...I've ou put about half a gallon of fuel through the truck and it's all on dirt too...I was told to get more aggressive tires and use 70k wt silicone in the drivetrain...

 

[Nitrotrout]

So you're saying the additional power of the 3.3 is breaking the rear tires loose? Good possibility.
But wouldn't it fishtail side to side? What direction does it donut? Clockwise or counter clockwise?

 

[Rolex]

Maybe there's a broken pin on an axle, or perhaps a stripped hex at the wheel.

 

[Racer 1966]

...I was told to get more aggressive tires and use 70k wt silicone in the drivetrain...

That's good advice. I had the same issue with my nitro Rustler. Tires made a big difference,the heavy fluid made it perfect. I used 100k in the diff.

 

[ninnon]

So you're saying the additional power of the 3.3 is breaking the rear tires loose? Good possibility.
But wouldn't it fishtail side to side? What direction does it donut? Clockwise or counter clockwise?

The 3.3 Is a powerful engine, so I do agree.