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  1. #1

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    Which part is this - backdraft 3.5

    I can't find the part # for this part in the schematic, here are pics:

    (in the yellow the drive cup / axle looking part) - its the part that goes on the side of the differential, not the one for the front/rear.*





    This was the original part (broken):





  2. #2

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    RE: Which part is this - backdraft 3.5

    Here's another pic, it's the part in yellow, pointing at it with blue arrow



  3. #3

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    RE: Which part is this - backdraft 3.5

    you'll have to order the whole diff in order to get that part I'm almost sure . because I have the Earthquake 3.5 which has the same set up .

  4. #4

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    RE: Which part is this - backdraft 3.5

    actually it looks like I found it - bs903-110 for some reason it doesn't show the part # in the backdraft 3.5 schematic but, it does show it in the backdraft 8E schematic. We already tried bs903-109 and that was just barely too long. The bs903-110 we matched it with the broken piece and they are the exact same length so it has to be it. 



  5. #5
    nitrosportsandrunner's Avatar
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    RE: Which part is this - backdraft 3.5

    get some O rings from a hardware store. for that part to break, the driveshafts have to much back/forth play which wore out the drive cup. an O ring or 2 will limit the play, reducing wear on both the drive cup and driveshaft.
    SC10rs, 1/6 hummer crawler, Kyosho Twin Force, Lunchbox project, Techone P51,


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