CV Joint Drawings

Discussion in 'Transmission' started by Dave, Apr 14, 2011.

  1. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    Std. 100 mm Inner:
    InnerCV.jpg

    Later Tripod Inner - This from Mk4 V5 4Motion:
    Mk4V54Motion.jpg

    Mk2 GTI Outer:
    Mk2GTI.jpg

    B3 Audi 80 Front & 90 Q 20V Rear:
    AudiB380.jpg


    B3 Audi 90 Q 20V Front:
    AudiB390QFront.jpg

    Mk3 VR6:
    Mk3VR6.jpg

    Mk4 R32:
    Mk4R32.jpg

    Mk4 2.0 4Motion:
    Mk4204motion.jpg
     
    Last edited by a moderator: Mar 23, 2018
    HPR likes this.
  2. A.N. Other Banned after significant club disruption Dec 5th 2

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    Mk2 GTI = Corrado non-VR, Passat non-VR, Ibiza etc.

    Nice info Dave.
     
  3. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    The database of drawings is massive.

    I could actually go through it and cross-reference every joint!

    BUT:

    I am not going to!

    ALTHOUGH:

    I will look at any special requests.
     
  4. Admin Guest

    Does anyone know of a direct fittment outer CV for Golf MK2 that uses a bolt instead of a nut?
     
  5. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    This is interesting as it shows Z = 27 Teeth (Splines) as are some of the the Mk3 Kit Car shafts! But, the Kit Car CVs use a bolt of course!

    It's the only 27 Spline one I have found yet.

    Some of the other Mk3 Kit Car shafts have 25 Splines and some 28 splines!
     
    Last edited by a moderator: Mar 23, 2018
  6. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    Not found one yet Tom!

    The Audi 80/90Q Rear is the one used by VWMS, and special hub with larger bearings, and a bored out wheel housing!
     
  7. Admin Guest

    OK many thanks :thumbup: would it be wise to modify an original item? cut of the threaded section and pop it on the lathe to bore then tap? Would the threads have to be heat treated in anyway? What thread size do the smallest bolts use?

    I can see one is 14mm (B3 Audi 80 Front) and the MK2 splined part is just over 20 (maybe 22mm OD will try and measure one), this would leave around 3to4mm wall thickness - is that enough meat [:[] what do you think Dave?

    Edit. Found a new smaller bolt size.
     
    Last edited by a moderator: Apr 15, 2011
  8. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    Well I wouldn't Tom! You are scaring me now!

    I recon that 20mm is a reasonable assessment of the root dia. I don't have DIN 5480 or 5482 to hand these days to come up with acurate dimns.

    The Audi 80 CV has an M14 thread in approx 25mm root. 5.5mm wall.

    The Audi 90 F has an M16 in approx 27 mm root. 5.5 wall.

    Don't forget Moment of Inertia is proportional to D /\ 4 so small difference in OD - ID will make big differences in strength!
     
  9. Admin Guest

    Just been out to measure a CV and the route is 22mm. 4mm wall. As you say not worth the risk if VW are using at least 5.5mm wall.

    So it will have to be a hub change with more splines and larger bore to allow more meat for the bolt.

    Is there anymore information around about that 'special' hub? was it a 4x100 stud pattern?
     
  10. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    Tom.

    Just out of interest.

    Consider the original GTI outer CV with nut then:

    Your Idea of drilling and tapping will be 77% as strong.

    The Audi 80 set up is 220% stronger.

    If you look at the thread below:

    Post #110 shows the VWMS set up.

    Post #218 shows the orininal VWMS hub design with a welded extension.

    https://clubgti.com/forums/index.php?threads/217443

    This thread has more info:

    https://clubgti.com/forums/index.php?threads/221091

    Basically:

    Bore out the wheel bearing housing to suit Audi 80 bearing - 893 407 615

    (Audi 90Q Rear - 443 407 615 A & Passat - 823 407 615)

    Use Passat hub, which is 4 x 108, and add 4 x100 tappings - 321 498 625 D

    (Audi 90Q Rear - 443 498 625 & Audi 80 - 321 498 625 E)

    You can then use VW or Audi Wheels. 7 x 15 Ronal R8s are easier to find in 4 x 108, but still not too common!
     
  11. neil kaye Forum Junkie

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    could you look up a mk4 GT tdi please ,or one as near as,reason is i have one and a vr6 corrado one and they look identical,but would be good to be sure :thumbup:
     
  12. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    Neil.

    These are the two listed for Mk4 115 bhp 1.9 TDi.

    No mention of GT. The 150 bhp TDi 4Motion uses the same outer!
    Mk4TDI115bhp.jpg Mk4TDI115bhpinner.jpg
     
    Last edited by a moderator: Mar 23, 2018
  13. neil kaye Forum Junkie

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    thanks for that,ill have a closer look at the c.v's later on,,but they look different according to this info to the mk3 vr6 in post 1
     
  14. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    Flipping heck Neil. Perhaps the database of drawings is wrong?[:s]

    I'll go through all Mk3s and Mk4s tommorow.:thumbup:
     
    Last edited: Apr 15, 2011
  15. neil kaye Forum Junkie

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    I doubt for a second the database is wrong,theres probably more than one cv for the mk4 depending the year
    i have just stripped the mk4 (which is from a W reg)one now and the inner splines are the same as the vr one,just not sure what year the vr one is
    thanks for your help on this btw
     
  16. Admin Guest



    Great posts Dave, I have read them with interest before but have not really put the information into any sort of practice/scenario!

    After reading it all i had two points to make (but im on holiday and went to the pub so only can remember the one), and here it is:

    In reference to the VWMS hubs there was this posted;

    In reference to;
    hub.jpg

    That would mean they used a 22mm shaft spline AKA MK2 shaft??? - this is where we need more info, as it would not seem right as the hub would be the same as a normal G2 except the 'special' hub - which looks to be just a part added onto to centre and support the VWMS spacers, where there more differences?

    What was the size of the bolt they used? this could give (if they used the MK2 spline - size of 22mm? stated by Idorap) a wall thickness maybe?

    Did they just use a standard modified (spaced) hub? I count 22 splines (on the VWMS pic below) but it could easily be 24 or 26 as some of them are not in the pic and therefore I have counted only half way round (which was hard to tell) and doubled?

    [​IMG]

    Do you have any more info on this?
     
    Last edited by a moderator: Mar 23, 2018
  17. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    What I do for you TOM!

    Don't have the 8V Workstatthandbusch, only the 16V one which only calls up the later type CVs. I have been hunting for an 8V Handbusch for years now!

    These are from the 8V and 16V Homologation Sheets.

    Long Hub
    grpahom1.jpg

    16V Later Shafts and Hubs
    grpahom2.jpg

    16V Early Shafts.
    grpahom3.jpg

    8V Later Shafts and Hubs
    grpahom4.jpg

    8V Early Shafts
    grpahom5.jpg

    Later.
    grpahom6.jpg

    Early.
    grpahom7.jpg

    Early Long Hub.
    grpahom8.jpg
     
    Last edited by a moderator: Mar 23, 2018
  18. Admin Guest

    Are i see, many thanks for that, so the early did not use the bolt but the nut!
     
  19. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    Correct. It was not until Audi developed the B3 90 20V that the hub with a bolt was designed. Even the UR Quattros, right up to 1991, had a nut!

    The Passat, of the same era, still had the nut, even though it used the same bearings and hub as the Audi!
     
    Last edited: Apr 16, 2011
  20. A.N. Other Banned after significant club disruption Dec 5th 2

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    Where does this belong Dave? We have a thread somewhere discussing 3-bolt inner CVs [:s]

    [​IMG]

    From here.
     

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