Drivetrain Are 72+73 Drive Shafts And Yokes Interchangeable?

Discussion in 'Classic Mustang Specific Tech' started by Platonic Solid, Jun 22, 2013.


  1. Platonic Solid

    Platonic Solid Founding Member

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    My 73 Mach (351C FMX 9” Rear) is at the mechanics as I just don’t have the time to repair its various issues.
    The mechanic has asked me to pull the drive shaft and yoke from one of my other 71-72 Coupes (302 C4 8” Rear) for use on the 73.

    Are these drive shafts and yokes interchangeable?

    I see one (65/73) 25 spline yoke and two (65/72) 28 spline (1 ext snap ring/ 1 int snap ring) available on Mustangs Unlimited.
    Mustangtek.com has good info, but unfortunately doesn’t include 73 on the list.
    If I was to guess based on the Mustangtek chart and what Mustangs Unlimited has to offer, I’d guess that my 73 uses a 25 spline yoke and 72 302 C4 uses a 28 spline.

    Would it be wiser to just buy a new yoke?

    Thanks in advance.
  2. rbohm

    rbohm Founding Member

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    i believe you can interchange drive shafts between 71-73 mustangs. you might have to change the rear U joint depending on which rear end yoke you have.
  3. horse sence

    horse sence SN Certified Technician

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    i not possitive on this but i think the FMX has a larger yoke than a c4
    its been a while since i worked with an FMX but i think it will change with a c6
  4. horse sence

    horse sence SN Certified Technician

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    i forgot i have a FMX here . it will not exchange with a c4 yoke. the FMX is larger
  5. Platonic Solid

    Platonic Solid Founding Member

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    Hmph. Once again I end up looking for a part that no one seems to have. Unless I'm wrong, I need a 31 spline 8-7/32" long C3AZ-4841-A. Can anyone verify this part number?

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