<div>Hi there</div><div>I just bought my summit last week and I haven`t ride it outside just afew minutes in the house.Today I realized that the front differential servo doesn`t work when I move the T-lock switchto the middle position,so the front diff doesn`t engage ,but surprisingly when I move the switch to down position both diffs get locked and worked fine.</div><div>I don`t know what to do....!!</div><div>please someone tell me what is the problem and how can I fix it?</div><div></div><div>Thanks in advance</div>

Is it new or old? If it's new, send it back to the hobby store you bought it from and exchange it. If it is second hand one, try changing servos and see how it goes.

Try reseting the transmiter i had to do the same thing with mine hope this helps...</p>

Thank you guys.The problem solved by reversing the 4th channel.</p>