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  1. #1
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    center differential question

    Ok beginners question here ,
    I would like to add the center differential (7014) when they become available.
    Why is reverse eliminated when the center differential is installed? I guess I dont understand why or how it eliminates reverse.

  2. #2
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    where did you hear that? i have never heard to reverse being eliminated.
    GARAGE
    e-revo, ME-revo, micro-t, slash, DX3S

  3. #3
    RC Champion
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    You are thinking about the nitro 1/10 REVO , the mini REVO will still have reverse .
    At WARN 80% and climbing !

  4. #4
    RC Racer
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    On the Revo 3.3 reverse is in the tranny. On the Revo and Slash VXL reserve is on the motor. It won't be eliminated.

  5. #5
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    center differential

    I sent a E-mail to Traxxas support about this, And here is their reply:


    At 04:13 PM 7/10/2009 +0000, you wrote:
    >I would like to add the 7014 center differential to my Revo 1/16 VXL.
    >I was told this mod might not allow me to use reverse anymore. Is this
    >true?
    >I dont want to order if I cant have reverse, If this is true, it should be
    >listed on the parts page, or instruction sheet


    Hello,

    The 7014 is not yet available. It will eliminate reverse.


    Best regards,
    Steve Lindholm,
    TRAXXAS Customer Service

  6. #6
    RC Turnbuckle Jr.
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    Quote Originally Posted by curlytop
    I sent a E-mail to Traxxas support about this, And here is their reply:


    At 04:13 PM 7/10/2009 +0000, you wrote:
    >I would like to add the 7014 center differential to my Revo 1/16 VXL.
    >I was told this mod might not allow me to use reverse anymore. Is this
    >true?
    >I dont want to order if I cant have reverse, If this is true, it should be
    >listed on the parts page, or instruction sheet


    Hello,

    The 7014 is not yet available. It will eliminate reverse.


    Best regards,
    Steve Lindholm,
    TRAXXAS Customer Service

    If thats truly the case it will most likely have a one way bearing (OWB) inside/on one of the gears.

    If you are going to install a CD one usually is going to race, most track rules dont allow reverse. Just like (race mode) on the ESC. You don't want a CD unless you are going to race it.
    Keep flex'in those forum keyboard muscles.

  7. #7
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    i have never heard of a center diff eliminating reverse in an electric..

    can someone please explain?!?

    sorry "got nitro" posted at the same time as me...

    Edited for language abuse.
    Last edited by cooleocool; 07-14-2009 at 09:17 PM.
    GARAGE
    e-revo, ME-revo, micro-t, slash, DX3S

  8. #8
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    Quote Originally Posted by got_nitro
    If thats truly the case it will most likely have a one way bearing (OWB) inside/on one of the gears.

    If you are going to install a CD one usually is going to race, most track rules dont allow reverse. Just like (race mode) on the ESC. You don't want a CD unless you are going to race it.
    as long as the cd eliminates wheelies ill be happy lol racing and wheelies dont mix at all
    keep your mouth closed and let your eyes listen

  9. #9
    RC Turnbuckle Jr.
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    Quote Originally Posted by H towns finest
    racing and wheelies dont mix at all
    Neither does front wheel drive. Just make sure you use a thick lube in the CD if you install one. It says that there is a "lube" in it but it dosen't mention the weight.

    If you run the truck with a CD on the street, durring heavy acceleration the back of the truck is going to squat down and the tires will bite into the pavement. The CD will then transfer the power to the wheels that have the least amount of traction "the front ones" giving you a nice front wheel drive truck. (worthless) at that point.. With a CD you have to do alot of track testing i.e tires, track layout, what kind of dirt ETC. before you can even think about what kind of weight lube you want to try first.
    Keep flex'in those forum keyboard muscles.

  10. #10
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    Quote Originally Posted by got_nitro
    Neither does front wheel drive. Just make sure you use a thick lube in the CD if you install one. It says that there is a "lube" in it but it dosen't mention the weight.

    If you run the truck with a CD on the street, durring heavy acceleration the back of the truck is going to squat down and the tires will bite into the pavement. The CD will then transfer the power to the wheels that have the least amount of traction "the front ones" giving you a nice front wheel drive truck. (worthless) at that point.. With a CD you have to do alot of track testing i.e tires, track layout, what kind of dirt ETC. before you can even think about what kind of weight lube you want to try first.
    Wow great post I was wondering about that. You made it very clear.

  11. #11
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    Quote Originally Posted by got_nitro
    Neither does front wheel drive. Just make sure you use a thick lube in the CD if you install one. It says that there is a "lube" in it but it dosen't mention the weight.

    If you run the truck with a CD on the street, durring heavy acceleration the back of the truck is going to squat down and the tires will bite into the pavement. The CD will then transfer the power to the wheels that have the least amount of traction "the front ones" giving you a nice front wheel drive truck. (worthless) at that point.. With a CD you have to do alot of track testing i.e tires, track layout, what kind of dirt ETC. before you can even think about what kind of weight lube you want to try first.
    well I run a cd in my picco revo so if its anything like that ill be good
    keep your mouth closed and let your eyes listen

  12. #12
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    What in the heck? Why would it eliminate reverse? Why would the engineers design it that way? These minis will get bashed by the majority of people and most of these trucks will never see a race. Therefore reverse is very important.

  13. #13
    RC Turnbuckle Jr.
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    Quote Originally Posted by JatoTheRipper
    What in the heck? Why would it eliminate reverse? Why would the engineers design it that way? These minis will get bashed by the majority of people and most of these trucks will never see a race. Therefore reverse is very important.
    Then you don't need a CD....That was simple.
    Keep flex'in those forum keyboard muscles.

  14. #14
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    Quote Originally Posted by got_nitro
    Then you don't need a CD....That was simple.
    lol I was going to say that also lol
    keep your mouth closed and let your eyes listen

  15. #15
    Traxxas Employee Nitro Chicken's Avatar
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    In this case the mighty and all knowing Steve Lindholm was flat out wrong. I realize that this shakes the very underpinnings of our beloved message board. Hopefully we will recover...
    "Fortunately son, I says fortunately I keep my feathers numbered for just such an emergency!"
    Foghorn Leghorn

  16. #16
    RC Turnbuckle Jr. Cameron's Avatar
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    Getting rid of reverse isn't an issue i turned it off as soon as i powered up my mini revo for the first time. I love what the CD did for my slayer and i will buy one for the mini as soon as i can.
    (RAH) (AH) + [ROMA (1+MA)] + (GA) + (OOH)(LA)

  17. #17
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    I was thinking it has something to do with using the brakes.

    With a 3.3 Revo using the center diff requires brakes on either side of the tranny (front and rear outputs). Without brakes on both sides it may cause instability during braking on dirt.

    Just a thought.
    Revo 3.3

  18. #18
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    Quote Originally Posted by got_nitro
    Then you don't need a CD....That was simple.
    Better handling is never a bad thing. It helps everywhere including bashing. So no, you might not need a center diff for bashing, but the handling improvement would be nice.

  19. #19
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    Quote Originally Posted by curlytop
    I sent a E-mail to Traxxas support about this, And here is their reply:


    At 04:13 PM 7/10/2009 +0000, you wrote:
    >I would like to add the 7014 center differential to my Revo 1/16 VXL.
    >I was told this mod might not allow me to use reverse anymore. Is this
    >true?
    >I dont want to order if I cant have reverse, If this is true, it should be
    >listed on the parts page, or instruction sheet


    Hello,

    The 7014 is not yet available. It will eliminate reverse.

    Best regards,
    Steve Lindholm,
    TRAXXAS Customer Service
    I could not believe that and send also a mail to Traxxas. And here ist the answer form Steve Lindholm:

    **********
    Hello Andre,

    It will not eliminate reverse.

    Best regards,
    Steve Lindholm,
    TRAXXAS Customer Service


    **********

    ... which is correct anwer now ... I never believed the "eliminate-story"

  20. #20
    RC Racer
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    if it elimanted reverse it would say it in the description.
    4x4 Slash
    3 2wd Slash
    3.3 T-max
    3.3 Revo

  21. #21
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    why do you even need a central diffrential?
    What are its advantages?

  22. #22
    RC Turnbuckle Jr.
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    Quote Originally Posted by trialslover7
    why do you even need a central diffrential?
    What are its advantages?

    IMO there is none with this light truck. One of the main reasons most use CD's in there 10th scale rigs is because it will have tunable front and rear brakes. More like a 1.1 truck where it would be 70% front and 30% rear stopping power. If you have 100% brakes to the front and rear going into a turn/corner chances are it's going to lock the back wheels and kick the truck sideways. Some like to power out of that kind of slide but for some they like the more precise turning. With 100% stopping power to all wheels all the time in this mini E-revo your going to power slide it all the time.


    Another IMO, The best thing for this little truck is a ESC with a drag brake for racing on dirt.
    Keep flex'in those forum keyboard muscles.

  23. #23
    RC Qualifier
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    Tune ya slipper , i have done it and its a blast...but i will ,as always be open for a try with the CD when it will be here.
    Stampede 4x4 4s | Stampede 4x4 1/12

  24. #24
    RC Racer
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    Quote Originally Posted by trialslover7
    why do you even need a central diffrential?
    What are its advantages?
    To put it plain and simple. The cd gives power to the wheels that need it. Anyone that says it is useless is wrong. For racing its a must, if you are just bashing and dont mind the non stop wheelies and dont mind losing control when you punch it hard when going in or out of corners then you dont need it. But you have to "tune" the cd with proper oil thickness, but thats another thread.

  25. #25
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    This may be a dumb question on a really old thread but here goes. I have an erevo vxl 1/16 and i am stripping rear diff ring gears every couple months even with proper shimming and replacing the bulkhead with a new traxxas one.

    I was considering buying an integy aluminum one hoping to eliminate flex and eliminate excessive gear mesh. but now i am considering a cd

    would this help. mainly because its gonna transfer the power to the front wheels that have far less load on them which will lessen the stress on the rear??

  26. #26
    RC Turnbuckle Jr. Petertje60's Avatar
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    If you are going for alu bulkheads, Integy might not be the best choice. I use GPM ones myself and never had a stripped diff since I mounted those. I have read good things about HR too. Never seen experiences from Integy bulkhead users, but the average Integy product has questionable quality.

    A center diff will reduce the risk of stripped diffs, but it will also make your front wheels spin more easily.
    Nobody is born with experience

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