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Thread: Diff pinion mix up

  1. 6th February 2014, 10:27 AM #1
    freedriver's Avatar
    freedriver
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    Diff pinion mix up

    G'DAy all .
    I had a set of new crownwheel and pinoins in the shed for a few years and have only now decided to install them but when i got them all opened up i discovered the pinoins are different! i.e. the originnal one from my d2 has a female thread cut into the end of the shaft and the new one has a male thread sticking out. This appears to be the only difference and it stopes me putting on the cap/peg for the tailshaft to locate in . Also makes it hard to torque the nut inside the diff housing.
    My question for someone who knows about this stuff is.
    Can i simply cut the male thread off and sink a female thread into the shaft?
    Or will this weaken it ?
    pretty anoying as i ordered the parts to suit a D2 and obviously got something else.
    Thanks all.
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  2. 6th February 2014, 10:41 AM #2
    Tombie Guest
    Youre trying to use the Donut style shaft arent you...

    Switch to the Uni-Uni shaft and flange and you should be good to go...
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  3. 6th February 2014, 10:55 AM #3
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    freedriver
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    Yes , i have been trying to keep the rubber coupling, I was considering changing but i thought i heard that you get some increase in vibrations using a unijiont . Is that correct or just a rumour i heard? Also zero maintenance with the rubber.
    Is it a simple matter of getting a uni that fits or is there more involved?
    Thanks.
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  4. 6th February 2014, 11:24 PM #4
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    Slunnie
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    Quote Originally Posted by freedriver View Post
    Yes , i have been trying to keep the rubber coupling, I was considering changing but i thought i heard that you get some increase in vibrations using a unijiont . Is that correct or just a rumour i heard? Also zero maintenance with the rubber.
    Is it a simple matter of getting a uni that fits or is there more involved?
    Thanks.
    Removing the rubber coupling does increase vibrations. I can vouch for that.
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
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  5. 7th February 2014, 08:52 AM #5
    twr7cx
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    Personally I found no additional vibrations when I switched from the OEM rear prop shaft setup to a Tom Woods double cardan replacement shaft.
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  6. 7th February 2014, 10:52 AM #6
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    It seems like swapping the rear to a uni joint may be an easy option but also it will cost a bit, different rear prop shaft, spacer, 4bolt flange $$. And i definitely don't want vibration problems.
    Also i have a new rubber coupling on and another new one for spare so that should last a while, it would be a shame to waste them.
    I think i am going to try to modify the pinion to fit unless someone knows that that is a bad idea ?
    I asume i will have to make it exactly like the original so that i get the preload torque right.
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