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  1. #1
    RC Qualifier Trentbaby65's Avatar
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    Rear diff pinion

    Has anyone rounded out the centre of the rear diff pinion. I can now turn my slipper shaft in the pinion.
    Original pinion from 8yrs. ago with missing teeth still sits snugly on the shaft.
    The pinion I replaced it with is only 6mths. old and the centre is worn out. Not happy Jan.
    Did they change the metal quality or just bad luck?

  2. #2
    RC Qualifier Trentbaby65's Avatar
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    Oh, and no binding, bearings are good and truck rolls smoothly.

  3. #3
    RC Champion thesmogman's Avatar
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    Part's wear out. Did you ever grease it? ANYTHING metal to metal requires grease. And cleaning and re-greasing. Why am I responding to this?????
    Slash 4x4 Tekin RX8GenII w/Pro4 4300hd

  4. #4
    RC Qualifier Trentbaby65's Avatar
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    Couldn't tell you mate. But I'm a mechanic of 35 odd yrs. and I am aware of cleanliness, wear and lubrication. Read my post again.

  5. #5
    RC Qualifier Trentbaby65's Avatar
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    Guess not.

  6. #6
    RC Champion thesmogman's Avatar
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    Defects happen. Sorry, but I thought you were wondering why an 8yr. old part failed.... I haven't heard of one failing.
    I will tell you by design it can have loads applied to it with a front collision if you're driveshaft doesn't have enough play. Have you had to replace a driveshaft or had a front collision? But might be just a bad part.
    Slash 4x4 Tekin RX8GenII w/Pro4 4300hd

  7. #7
    RC Qualifier Trentbaby65's Avatar
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    No big crashes or front hits. Everything is in good working order. I'll get a piccy up later but I suspect this new gear is a lot softer than than the old one.
    No biggy, just surprised it happened.

  8. #8
    RC Qualifier Trentbaby65's Avatar
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    Update.
    Just rounded out the centre of my second diff pinion. New gears are not as strong as old ones. 8yrs. out of original. No longer than 6mths. out of new stock.
    I am hard on my stuff. I always have been.

    Sent from my SM-J530Y using Tapatalk

  9. #9
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    I think you're doing something wrong.. nobody else has this issue. My bet is the thing it connects to is worn out.

  10. #10
    RC Qualifier Trentbaby65's Avatar
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    Brand new slipper shaft. Snapped my original. Now on my second replacement gear. I have a mate who does metal analysis for mining companies. Might get him to see if the old is harder than the new.

    Sent from my SM-J530Y using Tapatalk

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