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Thread: Turns out I was right to doubt that 7 1/4 rear end

  1. #11
    Aspen and Volare Super Member doublechaz's Avatar
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    I'm having some trouble getting my new rear end mounted up.

    I wonder if someone with a two door could measure on their car how far from the front face of the spring bracket to the centerline of the eye-bolt. The brackets I got are about two inches too big to go in. I'm wondering if the two extra doors on mine makes something about that part of the car different.

    My OE is 3 inches. The replacement I got is 5 inches.

    Thanks.
    Last edited by doublechaz; 06-05-2018 at 10:16 PM.

  2. #12
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    Can you post a pic of exactly what you are wanting measured? I'm not sure what you mean by eye-bolt? I can check when I get home

  3. #13
    Aspen and Volare Super Member doublechaz's Avatar
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    OK. When I get home I'll get started with measuring what I have and get some photos and point out where I'm confused. Thanks.

  4. #14
    Aspen and Volare Super Member doublechaz's Avatar
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    In the attached pic my OE measurements are as follows:
    A 34"
    B 24"
    D 3"

    The new parts are:
    A 34"
    B 22"
    C 5"

    So the overall lengths and axle position work out, but there is a small vertical bulkhead behind the hanger and ahead of the wheel arch. That bulkhead allows the old hanger to fit in, but the new hanger is too long to fit between this bulkhead and the hanger mounting point. I can't cut down the new hanger to the old dimensions as that would leave the spring two inches too short.

    I don't want to wait another month for more custom parts to be fab-ed, this weekend project has already been going a couple months too long. On the other hand I don't want to cut out these little bulkheads as they seem to back up the rear door jamb structure, and I would have to remake all the fuel lines and brake lines since they run along this bulkhead.

    Feeling pretty upset about what seemed a simple fix.


    So I guess the numbers I'm looking for is if the 2 door hanger matches my OE, or if it matches the new part.

    I'll get a pic under the car of what I'm talking about with the bulkhead...
    Last edited by doublechaz; 06-06-2018 at 10:56 PM.

  5. #15
    Aspen and Volare Super Member 77rr2x4s's Avatar
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    I assuming you bought new springs and they are shorter and they gave you longer hangers to make up the difference. Are the correct springs not available? Without looking at my car I believe I know what your saying about the area where the hanger mounts. I can look tomorrow.

  6. #16
    Aspen and Volare Super Member doublechaz's Avatar
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    The way I understood it the vendor had the springs made to order at an outside shop. They just used different numbers for the order than what my car had. Their stated theory is that the 2 door and 4 door Volare are different and that the longer hangers fit the 2 door because that little bulkhead isn't present.

  7. #17
    Aspen and Volare Super Member doublechaz's Avatar
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    These pics show that the new springs are a deal heavier than OE which is good. They are not as curved as OE, but I'm wondering if they wouldn't sit at about the same height given the stiffness.

    Also, you can see the pocket I'm working with. It looks like maybe I could cut away the part for the lowering hole and wedge it in if that wouldn't weaken the hanger too much given its additional length.

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  8. #18
    Aspen and Volare Super Member doublechaz's Avatar
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    Another idea would be to cut the new hangers at the green line. I'm checking with tech support to see what they think of the hanger strength after doing that. I'd much rather hack up bolt on parts than hack up the unibody. That way the work can be undone if desired.

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    I'll get the hangers done up in CAD (Cardboard Aided Design) to see if this is a viable fix.
    Last edited by doublechaz; 06-07-2018 at 02:37 AM.

  9. #19
    Aspen and Volare Super Member 77rr2x4s's Avatar
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    My guess is they used a spring from a different car (maybe e body or something) because it was available instead of having the correct spring made up. The new hanger being it has the two holes (i would assume)are to aid in the height adjustment. If you cut that off and lose that adjustment then the car may sit to high. Dunno. I`ll look up the part numbers for the oe spring and see if the 2dr 4dr are different. I didn`t think they were.
    Last edited by 77rr2x4s; 06-07-2018 at 08:39 AM.

  10. The Following User Says Thank You to 77rr2x4s For This Useful Post:

    doublechaz (06-07-2018)

  11. #20
    Aspen and Volare Super Member 77rr2x4s's Avatar
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    I looked in my mitchell book and it shows no difference between 2 and 4 dr springs. The only difference shown is whether they are 4 or 5 leaf springs. 5 leaf usually is station wagon and HD suspension cars. The length should be the same. I would call ESPO and ask them about the springs and they may be able to help. They are real familiar with mopars so they should be able to give some advice. (800) 903-9019
    Last edited by 77rr2x4s; 06-07-2018 at 09:21 AM.

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    doublechaz (06-07-2018)

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