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  1. #1
    RC Racer
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    Traxxas Extreme heavy duty driveshafts vs heavy duty

    Hello,

    With the launch of the Rustler 4x4, Traxxas introduced the “extreme heavy duty” driveshafts (6851A Front / 6852A Rear).
    These are also included on the most recent release of the Slash 4x4 Ultimate.

    They are - supposed to be – upgrades over the “heavy duty” driveshafts that are still used on the Stampede 4x4 and the other versions of the Slash (6851X / 6852X).

    I have some spare parts laying around and I’m considering building a new 4x4 (Slash/Stampede/Rustler). Probably mostly drive on a 2S.

    I need some extra driveshaft for this build.

    I know that there are beefier driveshafts (MIP’s, Tekno’s, ...), but I would love to hear your opinion on the extreme vs the heavy duty shafts from Traxxas, based on your experience.

  2. #2
    RC Competitor
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    For what’s its worth, I’ve been running the extreme HD ones on my slash, on 4s. No breakage as of yet. Probably 10 runs total.

  3. #3
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    I broke a rear one on my Rustler 4x4 when I was jumping it. It snapped at the inner u joint.

  4. #4
    RC Racer
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    Thanks for sharing !

    I think I'll skip the extrem heavy duty since I noticed that you can't buy the parts of the driveshafts seperate.
    I don't want to buy a full set every time something (like a u-joint) breaks.

  5. #5
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    We've been running the extreme hd on our brushless 4x4 Stampede for over 6 months now with no sign of wear and I'm hoping they'll have rebuild kits at some point when it comes time but so far they've been awesome.

  6. #6
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    Nice to hear !

    I don't think they'll start selling a rebuild kit, they are selling these shafts for over a year now.
    To bad.

  7. #7
    RC Racer
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    Quote Originally Posted by StijnH View Post
    Hello,

    With the launch of the Rustler 4x4, Traxxas introduced the “extreme heavy duty” driveshafts (6851A Front / 6852A Rear).
    These are also included on the most recent release of the Slash 4x4 Ultimate.

    They are - supposed to be – upgrades over the “heavy duty” driveshafts that are still used on the Stampede 4x4 and the other versions of the Slash (6851X / 6852X).

    I have some spare parts laying around and I’m considering building a new 4x4 (Slash/Stampede/Rustler). Probably mostly drive on a 2S.

    I need some extra driveshaft for this build.

    I know that there are beefier driveshafts (MIP’s, Tekno’s, ...), but I would love to hear your opinion on the extreme vs the heavy duty shafts from Traxxas, based on your experience.
    I’m late to this thread, but from my experience the extreme heavy duty drive shafts are really good. I broke an output yoke and that was my fault, I was doing high speed wheelies on my rustler 4x4 and didn’t let off the throttle and the right rear tire hit the ground at max power, pop when the output yoke lol

    Besides that, they have held up to 4s power and have not warped or stretched. They are holding up well. They are a bit pricey for just one, 12 dollars each, but they are really well made. I’d recommend them. I’m getting a set for my newest rustler VXL 2wd, the stock driveshafts are now junk from 3s on the VXL system.


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  8. #8
    RC Racer
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    Besides that, they have held up to 4s power and have not warped or stretched. They are holding up well.
    That's impressive !

  9. #9
    RC Racer
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    Quote Originally Posted by StijnH View Post
    That's impressive !
    I’ll get you some pics by tomorrow evening so you can see for yourself


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  10. #10
    RC Champion zedorda's Avatar
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    When I bought my first set I bought 3 full sets just to have parts I didn't have to order. Knowing Traxxas any rebuild kit will cost more per axle than buying the set anyways.

  11. #11
    RC Qualifier Panther6834's Avatar
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    First, the "extreme heavy duty" driveshafts are NOT all that 'heavy duty'...they are still plastic. If you truly want 'heavy duty', look I forget than the Traxxas CVDs, or the MIP Xtra Duty, driveshafts. These two are the only TRULY 'heavy duty' driveshafts. Just note that, not even they are "bulletproof"...there's NO such thing, despite what any manufacturer claims.

    On the 'plus' side, with either (Traxxas CVD, or MIP Xtra Duty), you CAN obtain individual parts. About 8-9 months ago, while driving my Rustler 4x4 in a 'rookie' class race, the winning driver took a "victory lap"...and, upon completion of his lap, ran his vehicle straight into my right-rear wheel, snapping the axle stub exactly where the hex pin is. I called Traxxas, explained what had happened, and, since I had just purchased the driveshafts less than two weeks prior, they shipped me...no charge...a replacement axle stub. Outstanding customer service, AND easily obtainable replacement parts (Amain, RPP Hobby, direct from Traxxas, and others).

    ~ More peace, love, laughter & kindness would make the world a MUCH better place
    ~ Love, laughter & kindness makes the world better

  12. #12
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    Quote Originally Posted by Panther6834 View Post
    First, the "extreme heavy duty" driveshafts are NOT all that 'heavy duty'...they are still plastic. If you truly want 'heavy duty', look I forget than the Traxxas CVDs, or the MIP Xtra Duty, driveshafts. These two are the only TRULY 'heavy duty' driveshafts. Just note that, not even they are "bulletproof"...there's NO such thing, despite what any manufacturer claims.

    On the 'plus' side, with either (Traxxas CVD, or MIP Xtra Duty), you CAN obtain individual parts. About 8-9 months ago, while driving my Rustler 4x4 in a 'rookie' class race, the winning driver took a "victory lap"...and, upon completion of his lap, ran his vehicle straight into my right-rear wheel, snapping the axle stub exactly where the hex pin is. I called Traxxas, explained what had happened, and, since I had just purchased the driveshafts less than two weeks prior, they shipped me...no charge...a replacement axle stub. Outstanding customer service, AND easily obtainable replacement parts (Amain, RPP Hobby, direct from Traxxas, and others).

    ~ More peace, love, laughter & kindness would make the world a MUCH better place
    For the plastic driveshafts, imo, they are pretty **** strong compared to standard driveshafts and that’s what makes them heavy duty.

    Now if you want to throw a bit of money at steel heavy duty driveshafts go ahead. But right now the 6582a driveshafts are working out great for me and my heavy trigger finger. If and when I start destroying the heavy duty plastic driveshafts I’ll upgrade. But for what they are, they aren’t bad at all


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  13. #13
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    Quote Originally Posted by Rocketzx1 View Post
    For the plastic driveshafts, imo, they are pretty **** strong compared to standard driveshafts and that’s what makes them heavy duty.

    Now if you want to throw a bit of money at steel heavy duty driveshafts go ahead. But right now the 6582a driveshafts are working out great for me and my heavy trigger finger. If and when I start destroying the heavy duty plastic driveshafts I’ll upgrade. But for what they are, they aren’t bad at all


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    I agree, they are decent. I'm with you, I don't usually replace parts until they break, or if they are a known weak point. I put aluminum axles in mine after it broke.

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  14. #14
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    Quote Originally Posted by StijnH View Post
    That's impressive !
    Here you go, pics of front and rear heavy duty plastic driveshafts.






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  15. #15
    RC Champion zedorda's Avatar
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    It took 6+ calls to Traxxas and conversations with several employees there to get down to details about the difference between "heavy duty","extreme heavy duty"&"cold-weather" parts. It seems most of the end-user level customer support have no real information about the differences just marketing terms to repeat. It wasn't until I arranged a return call from a next level tech support agent could I got some details.

    From what I gather the new cold weather and extreme duty parts are some of the few parts using a new material mixtures that has less fiber with a slightly thicker mold and a more flexible cold temperature performance. The down side for one is that the axles can pop off easier at warmer temps but are far less likely to snap.

    This was in an effort to fill a gap they saw between the steel CVD axles and the plastic heavy duty axles. Since there has been an increase in complaints about axle breakage since the upgrade to the 4-pole motors in the VXL brushless lines of vehicles.

    I don't know because I couldn't get an answer to if they are planning to make the extreme duty axle the stock parts on all the VXL lines of vehicles.

  16. #16
    RC Racer
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    @zedorda - thanks for the info & the effort you did to gather it !

    Thanks everyone for sharing your experience, thoughts and pictures !

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