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  1. #1
    Join Date
    Jun 2016
    Location
    Nantwich Cheshire
    Age
    51
    Posts
    160

    Prop shaft to xj40 diff Flange

    Well I very excitedly picked up my prop shaft today.
    Only to find it doesn't fit. Does anything with these cars....

    It looks like I need to remove about 10 -15mm of the spigot that comes out of the diff.
    That is unless I'm being a bit thick and there is some other trick to fitting it.

    The pick attached shows the problem.
    Any suggestions would be much appreciated.

    Cheers

    Mike
    Attached Images Attached Images

  2. #2
    Join Date
    Nov 2005
    Location
    Plymouth. Devon
    Posts
    745
    Hi Mike
    there are two flange, round one lie your prop and tri star like your diff, you need tri flange on the prop to sort it, hope that makes sence
    DAX TOJEIRO DE DION
    CHEVY SB 383 STROKER 6.2Ltr 450 Hp
    Tremec TKO 3550 3.54.1 Jag Diff
    RCR Mk 1 GT 40 in build

  3. #3
    Join Date
    Jun 2016
    Location
    Nantwich Cheshire
    Age
    51
    Posts
    160
    I knew about the two different flanges.
    The guys who made my propshaft knew all about the xj40 setup with the rubber donut and three bolt flange. I think the problem is the diff spigot is designed to accommodate the two flanges and a rubber doughnut. As soon as you remove the doughnut from the equation the spigot is too long. I just need to know if it's ok to cut the spigot down...

  4. #4
    Join Date
    Jan 2004
    Location
    Southwest, Somerset, U.K.
    Age
    33
    Posts
    3,048
    Just cut it off. Just keep the metal cool with an airline blower as you cut it to prevent heat transfer damaging the pinion seal or spline sealant.

    I usually cut it before fitting the diff but it can be done with a cut of tool when in the chassis.

  5. #5
    Join Date
    Jun 2016
    Location
    Nantwich Cheshire
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    51
    Posts
    160
    Cheers, I will cut it off.

  6. #6
    Join Date
    Jul 2014
    Location
    North Wales
    Age
    53
    Posts
    138
    I had the same problem so chopped it down enough to fit the shaft but still enough to keep it centered

  7. #7
    Join Date
    May 2014
    Location
    Birmingham
    Age
    40
    Posts
    384
    Just to note i had mine made by Dave Mac props, gave him the other end of a jag prop and they rebuilt the bearing into the prop, brilliant job. (This go's over the center pin you are having to cut)

    This allows a proper centered bearing to be used with my T56.

    http://davemacprops.co.uk/dmphome.html

    Alan.

    P.S i have a jag prob end if anyone wants to do this, pm me.
    AK Gen II delivery date Oct '15
    GM Vortec LQ4 364ci
    Tremec T56 Terminator.

  8. #8
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    39
    Posts
    3,099
    When you say centred bearing, do you mean a central support bearing on the prop? I'm trying to picture how that would work with a prop that's only a foot long (or thereabouts) so suspect I'm misunderstanding.. any pics?
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

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