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Thread: rear cv joint conversion...

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    Default rear cv joint conversion...

    Does anyone have any info or links regarding a cv conversion for 240K rear swingarms?
    Can z31 stuff be used?...

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    Registered User 240K&Beyond's Avatar
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    Hi have done the conversion before. I used skyline R30 ales, but I had to shorten the shafts. If you go down that path, make sure the fabrication company you use does a good job on the welds. I broke 3 ales before they got it right.
    There is nothing worst than having to climb under a car on the side of the road and replace a busted axle.
    Bruce
    1973 240K GL - KHGC110001866 (The Good) (Yellow)
    1973 240K GL - KHGC110001731 (The Bad ) (Blue)
    1973 240K GL - KHGC110001407 (The Ugly ) (Green)
    1982-85 x3 R30 Skyline Hatches (The Bits Store)
    1993 BNR32 GTR - Every January the 29th
    2006 Turbo Territory Ghia - The Daily Driver

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    I know this old,
    but how much shorter were the axles ?

    Nigel

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    Mark Belrose mark belrose's Avatar
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    The most pain free conversion - except for your wallet - http://www.wolfcreekracing.com/wcrcv...aftaxlekit.doc

    Mark

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    Quote Originally Posted by mark belrose View Post
    The most pain free conversion - except for your wallet - http://www.wolfcreekracing.com/wcrcv...aftaxlekit.doc

    Mark
    the Doc says.. "For Datsun 510 & 240/260/280Z",

    not 240K..

    as far as I can tell

    Nigel

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    I cannot remember how much to shorthen them. But it's pretty easy to work out. Jack up the rear or the car so that both wheels are off the ground and measure the length of the axle. That's you max length. I then removed a spring, but left the shocker in. Compress the wheel up as far as it will go. Measure the short length. Putting the spring back in and dropping the car back on the ground, bouncing on it a couple of times to make it come to rest. Measuring the axle length now should be half way (mid length).

    You need your CV axles to reflect the same measurements.

    The danger is if the axle is too long or short, the following will happen:

    1) To Long: When you drive over a hard bump and the spring compresses, you will hear a loud bump in the rear end. The same can occur when performing a tight turn whilst applying power. This is casing the axle to compress and effectively hitting/banging the axle into the side of the diff.

    2) To Short: Travelling over a crest of a hill or becoming airbourne and the axles will extend to it's maximum and if the wheel needs to travel further downward, it willpop the axle out of the side of the diff. This type of driving condition does not happen as often as the first instance above.

    I aird on the side of caution and made my axles 5 to 8 millimeters on the short side.

    From memory, it cost me about $75 to $90 AUS to shorted each axle, but that was ten years ago.

    The only other thing I could think of that could possibly cause and issue is that if you were planning to put a wider R200 diff in, then you better check the maximum angle that the CV joint can move. This would become a concern when the diff is wider, the axle needs to be a lot shorter. When the wheel is at maximum downward travel, the CV joint will be at max angle. If the CV cannot made the angle, then I don't think it will last to long.
    Bruce
    1973 240K GL - KHGC110001866 (The Good) (Yellow)
    1973 240K GL - KHGC110001731 (The Bad ) (Blue)
    1973 240K GL - KHGC110001407 (The Ugly ) (Green)
    1982-85 x3 R30 Skyline Hatches (The Bits Store)
    1993 BNR32 GTR - Every January the 29th
    2006 Turbo Territory Ghia - The Daily Driver

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    Registered User Noddle's Avatar
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    Thanks for that,

    Did you just use the R30 flange, (see picture) on the 240k Stub ?

    or did you use the R30 Stub and Flange ?
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    Mark Belrose mark belrose's Avatar
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    Quote Originally Posted by Noddle View Post
    the Doc says.. "For Datsun 510 & 240/260/280Z",

    not 240K..

    as far as I can tell

    Nigel
    Oops, I realized that right after posting. I do apologize for my "240Z-centric mindset".

    Mark

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    Quote Originally Posted by Noddle View Post
    the Doc says.. "For Datsun 510 & 240/260/280Z",

    not 240K..

    as far as I can tell

    Nigel
    Nigel,

    Can you contact Wolf Creek and ask them to provide a kit with a shorter shaft? Just a thought.

    -- Mike
    Mike

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    Does anyone know if the R30 flange will fit the 240K axle ?

    also. can I remove the Uni-Joint flage comming out of the diff, via the bolt, and put the R30 drive shaft into the diff ?, or do I need to install the R30 diff into my 240K ?

    Nigel

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    Nigel,
    I changed the Diff, I do not beleive you can change shafts on the original K diff.
    For the life of me, I cannot remember what flanges I used. But being that I used a R30 Diff and Axles, there is a good change I used the flanges as well. But, something keeps me thinking I needed something off a 240Z (not 240K) and it migh have been the flanges.

    Have you tried to fit the flanges? Did the dust cover fowel on the stub bearing case? Or does it spin freely?
    Bruce
    1973 240K GL - KHGC110001866 (The Good) (Yellow)
    1973 240K GL - KHGC110001731 (The Bad ) (Blue)
    1973 240K GL - KHGC110001407 (The Ugly ) (Green)
    1982-85 x3 R30 Skyline Hatches (The Bits Store)
    1993 BNR32 GTR - Every January the 29th
    2006 Turbo Territory Ghia - The Daily Driver

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    I haven't tried it yet, since my 240K is my daily drive,
    but I now have a clicking sound from the rear when I apply power and take if off, sounds a bit like a uni joint dying, so I'll have a look at the flange when I fix the drive shaft.

    Nigel

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    Here are some pictures I took

    The first one is off my MR30 parts car, I measured from the diff to the flange with the suspension dropped (with the car jacked) its approx 44cm

    the Second one is with the MR30 flange on the 240K axle, its approx 42cm,
    so from this the MR30 axle is about 2cm longer, give or take a little..

    the other are pictures of the MR30 Flange compared to the 240K one.
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    Registered User Noddle's Avatar
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    and some more pictures
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    Default 240K WCR CV Halfshaft Kit modifications.........

    Quote Originally Posted by Mike View Post
    Nigel,

    Can you contact Wolf Creek and ask them to provide a kit with a shorter shaft? Just a thought.

    -- Mike
    Mike, Bruce, Nigel, et al,

    Todd Walrich from Wolf Creek Racing here. We are also making slightly shorter axles for R200 apps in the Z-car. I don't know anything about the 240K but from what I can discern from this thread, it appears to me that it uses standard type u-joint half shaft axles. If this is the case, I'm sure I can cut an axle (longer or shorter) to fit for you and at that point, there is absolutely NO modifications to your current stubs and companion flanges for my kit. It is a bolt-on mod for u-joint halfshafts. Let me know your interest and I have a pix with a dimenesion line for what I need to know. As a side note, we shipped 2 kits to the UK and 1 each to Aussie and New Zealand this week. Int'l shipping is not a problem.

    Let us know what we can do to help you out!

    Todd

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    Quote Originally Posted by Twalrich View Post
    Mike, Bruce, Nigel, et al,

    Todd Walrich from Wolf Creek Racing here. We are also making slightly shorter axles for R200 apps in the Z-car. I don't know anything about the 240K but from what I can discern from this thread, it appears to me that it uses standard type u-joint half shaft axles. If this is the case, I'm sure I can cut an axle (longer or shorter) to fit for you and at that point, there is absolutely NO modifications to your current stubs and companion flanges for my kit. It is a bolt-on mod for u-joint halfshafts. Let me know your interest and I have a pix with a dimenesion line for what I need to know. As a side note, we shipped 2 kits to the UK and 1 each to Aussie and New Zealand this week. Int'l shipping is not a problem.

    Let us know what we can do to help you out!

    Todd
    Hi Todd ,
    Do you have a link to you Kit ? for the "Z" half shaft mod ?,

    Thanks, Nigel

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    Quote Originally Posted by Noddle View Post
    Hi Todd ,
    Do you have a link to you Kit ? for the "Z" half shaft mod ?,

    Thanks, Nigel
    Nigel,

    Here you go:

    http://www.wolfcreekracing.com/wcrcv...aftaxlekit.doc

    Todd

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    Todd,

    I'm here in the US, California, and definitely interested in your axle kits. I have a GC111 Skyline which is the Japan version of the Datsun 240K. If you send me the pic with the dimensions that you need I can measure up mine and see if your kit will work. I might also be able to pull my half shaft and send it to you. Little less cost than having one of the mates in Oz send one.

    Email is ctcurnes@yahoo.com

    Chris

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    Registered User Noddle's Avatar
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    Quote Originally Posted by Twalrich View Post
    Hi,

    Thank you for the information, but at $900 US, give or take a bit, that's to much for me sorry.

    Nigel

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    www.project240k.com khughes's Avatar
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    that isn't a bad price.. it cost me a lot more to do mine (i was trying to do it on the cheap too, but eventually it adds up, mostly in labour) and i still have unresolved issues.. though by the look of the thickness of the hub on that kit.. it too will have issues hitting the arm(that's one of my problems.. i need to reduce the width of my CV/hub adaptor (which is only around 1cm thick) so that the bolts don't hit the arm.
    07/74 Datsun 240K GL Hardtop KHGC110 - #5497 (longest 240k project in history?)
    1970 Datsun 240Z HS30 #212

    www.project240k.com - project details on all my cars

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    Registered User Tyrone's Avatar
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    I know this is an old post, but has anyone purchased the kit from wolfcreek? I've got a GC111 and managed to grab a 280Z R200, but I am not sure as to what CV's I will need. Will the 280Z R200 even fit?

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    Default z31 rear cv conversion

    Hi, I've done this conversion in my 240k, I have contacts in melbourne for an engineer to make the half shafts....I have post pictures in Operation K, post number #55

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