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Thread: Front Torsion Bar Splines - Help

  1. 01-17-2015, 12:38 PM #1
    tom1394racing
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    Front Torsion Bar Splines - Help

    I am in the process of installing the front suspension on my '70E restoration project and ran into a problem while trying to install the RHS torsion bar in the RHS A-arm. I cannot get the splines to line up. I tried to put the RHS torsion bar into the LHS control arm to check the fit and the splines line up nicely.

    I took a close look at the spines in the RHS A-arm (I have the front caps off) and found that instead of 30 splines like the LHS A-arm it had only 29 splines. See the attached pic and count them yourself just to check that I am not suffering from brain fade.

    These A-arms are obviously not original to the car since I am replacing the hydro-pnuematic system with Koni struts and torsion bars. I have never seen an A-arm with 29 splines. I would not think that I have a hydro-pneumatic RHS A-arm as these would not have splines inside as best I know.

    Anyone have an idea what is going on here?
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    Tom Butler
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  2. 01-17-2015, 01:03 PM #2
    Flieger
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    Can you post a picture of the two arms? My guess is 914 A-arms but I really don't know.
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  3. 01-17-2015, 01:39 PM #3
    gled49
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    Probably 914-4. Was this a Hydro suspension car? I've seen Hydro cars with 914 A arms, as torsion bars weren't used, they didn't care. Gled
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  4. 01-17-2015, 03:20 PM #4
    tom1394racing
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    Here is a pic of the suspicious A-arm. Looks identical to a 911 arm to me. Fits perfectly on the 911 chassis. A friend on Pelican has identified the 29 spline arm as a 914-4 arm. Can anyone confirm that the 914-4 used a 29 spline/tbar?

    If so, just my luck as I sold my last RHS 911 u-tab A-arm last week.

    Thanks for the help.
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    Tom Butler
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  5. 01-17-2015, 04:30 PM #5
    Harvey Weidman
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    914s do have a different spline count.
    I forgot the spline number but we had to stock separate bars for the 914s.....
    Jim will know the spline count for sure....
    (that was part of our inexpensive changeover for the hydro pneumatic susp conv)
    H
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  6. 12-12-2018, 03:20 PM #6
    Jim Breazeale
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    914s have 29 splines and 911s and 914/6s (cause it uses 911T front struts) have 30.

    Regards

    Jim
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  7. 12-12-2018, 05:59 PM #7
    Slcarr
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    Thank you every one. 30 splines = 911,912 and 914/6. 29 splines = 914/4
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  8. 12-13-2018, 06:42 AM #8
    sithot
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    Parts book fwiw:
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  9. 12-17-2018, 08:32 AM #9
    Cliff
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    Anyone Know if 914/4s ever came with the U tab for anti sway bars? I know some T’s didn’t have the U tabs.....cliff
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  10. 12-18-2018, 10:24 AM #10
    Jim Breazeale
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    Quote Originally Posted by Cliff View Post
    Anyone Know if 914/4s ever came with the U tab for anti sway bars? I know some T’s didn’t have the U tabs.....cliff
    Yes. 914/4s had the U tabs
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