Welcome to The RC Doctor, an area of CompetitionX dedicated to helping you diagnose and repair any RC car or truck problems. With over 20 years of RC experience, The RC Doctor provides expert advice on nearly all subjects related to RC cars and trucks. We can help you troubleshoot everything from faulty electronics to broken chassis/suspension parts and point you in the right direction on how to get it fixed. If you have an ailing RC, fill out the Ask The RC Doctor form on the right and let us help you diagnose your problem!

Recent Surgeries

B4 Buggy Has a Slippery Rear End

B4 Buggy Has a Slippery Rear End

Question: RC Doc- I’ve been driving my Team Associated B4.2 Buggy for a while, self-teaching myself mechanics and such. What I can’t figure out is how to keep the back end from spinning out and …

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Bad Bugs Buggy Steering

Bad Bugs Buggy Steering

Question: Doctor- The steering in my HobbyKing Bad Bug is pretty sloppy. I watched an online review that stated I need to tighten the steering servo and use a little bit of threadlock to keep …

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Team Durango Turning Troubles

Team Durango Turning Troubles

Question: Hey Doc- I have a Team Durango DEX410v3 and having some issues with it turning. Our track is on a gymnasium floor that has carpet patches in the corners. On the straights its fine, …

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Hey LRP, Where’s My Reverse?

Hey LRP, Where's My Reverse?

Question: Hi Doc- I recently purchased a second hand car with the LRP IPC V6 ESC installed in it. My problem is that there is no reverse on the remote. I replaced the old remote …

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Wiper Speed Control Not Powering Motor

Wiper Speed Control Not Powering Motor

Question: Hey Doc- I have an older Tamiya Blackfoot that uses a wiper speed control. When I turn it on, the servo moves the wiper arm back and forth, but the truck doesn’t go anywhere. …

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HPI 5B AVC (or DBox-2)

HPI 5B AVC (or DBox-2)

Question: Hi Doc- Can I use a Spektrum DX2E and SRS4200 (AVC) Receiver on my HPI Baja 5B? I was thinking it might make it alot easier to drive. Thanks for your help! Kudin Answer: …

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DHK Wolf – Steering But No Motor

DHK Wolf - Steering But No Motor

Question: Hiya Doc- I have a DHK Wolf with a brushless motor and when I turn my car on, it recognizes the but the motor doesn’t respond. Do you think it’s the motor or the …

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Sticky HPI 5B Steering

Sticky HPI 5B Steering

Question: Hi Doctor- I have a HPI Baja 5B and am currently racing it in any race I can find. I have been having a problem with the steering returning to center. I have checked …

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Diff-icult Question

Diff-icult Question

Question: Hi Doctor- This question is about the Differential setup you have on your site: http://www.competitionx.com/rc-racing/rc-tuning-guide/rc-tuning-differential/. I’m running a Tamiya TA05R and I use it mostly for racing so speed is crucial. I also need …

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Motor Turn Question

Motor Turn Question

Question: Hiya Doc- I just got back into R/C’s again and recently purchased the Duratrax Evader EXT2.4. I know its not the greatest truck in the world but it will handle a beating and it …

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