8 3/4 axle chart - the good one Sticky please?

Brakes, Steering & Suspension

  1. YY1

    YY1 Well-Known Member

    Messages:
    20,404
    Likes Received:
    13197
    Joined:
    Jun 26, 2010
    Location:
    FL
    Local Time:
    2:42 AM
    Can we get the "good" axle measurement chart as a sticky?

    The one that has the correct numbers for the 66/67 axles?

    I can never seem to find it when I need it.
     
    • Like Like x 1
    • Agree Agree x 1
    • moparmarks

      moparmarks I'm just a guy with a screwdriver. FBBO Gold Member

      Messages:
      7,302
      Likes Received:
      3016
      Joined:
      Jul 31, 2011
      Location:
      Western Colorado
      Local Time:
      12:42 AM
      3/4" axle shaft lengths measured from the tip of the splined end
      to the outside of the flange:
      A BODY
      '66-'72= 27 11/16"
      B BODY
      '65-'67= 28 7/8"
      '68-'70= 29 3/16"
      '71-'74= 30 5/8"
      '71-'73 wagon= 31 21/64"
      C BODY
      '65-'69= 30"
      '70-'71= 30 5/8" (Chrysler & Fury)
      '70-'73= 31 21/64" (and '69 wagon)

      IMPERIAL (Large Bolt Pattern)
      '65-'66= 30 1/8"
      '67-'69= 30 5/16"
      '70-'71= 29"
      '72-'73= 31 7/16"
      E BODY
      '70-'74= 29 31/32"
      A100
      '65-'70= 30"
      D100
      '65-'71= 31 1/8"
      '72-'74= 31 21/64

      Rear end widths, drum-to-drum:
      A BODY
      '66-'72= 57 1/8"
      B BODY
      '62-'63= 58 1/2" (And '64 Max Wedge)
      '64 = 60 7/8" (Exc.Max Wedge)
      '65-'67= 59 1/2"
      '68-'70= 60 1/8"
      '71-'74= 63"
      '71-'73 wagon= 64 3/8"
      C BODY
      '65-'69= 61.75"
      '70-'71= 63.0" (Chrysler & Fury)
      '70-'73= 64 3/8" (and '69 wagon)
      IMPERIAL
      '65-'66= 61 15/16"
      '67-'69= 62 5/16"
      '70-'71= 59 3/4"
      '72-'73= 64 9/16"
      E BODY
      '70-'74= 61 5/8"
      A100
      '65-'70= 61 3/4"
      D100
      '65-'71= 63 15/16"
      '72-'74= 64 3/8"



      Spring perch widths (center-to-center)
      A BODY
      '66-73= 43"
      B BODY
      '62-'70= 44"
      '71-'74= 47.3"
      C BODY
      '65-'73= 46"
      E BODY
      '70-'74= 46"


      Housing widths, flange to flange
      A BODY
      '66-'72= 52 5/8"
      B BODY
      '62-'63= 53 1/4" (And '64 Max Wedge)
      '64 = 55 5/8" (Exc. Max Wedge)
      '65-'67= 54 1/4"
      '68-'70= 54 15/16"
      '71-'74= 57 7/8"
      '71-'73 wagon= 59 7/16"
      C BODY
      '65-'69= 56 3/4"
      '70-'71= 57 7/8" (Chrysler & Fury)
      '70-'74= 59 7/16" (and '69 wagon)
      IMPERIAL
      '65-'66= 57"
      '67-'69= 57 3/8"
      '70-'71= 54 3/4"
      '72-'73= 59 5/8"
      E BODY
      '70-'74= 56 31/64"
      A100
      '65-'70= 56 3/4"
      D100
      '65-'71= 58 5/16"
      '72-'74= 59 7/16"

      - - - Updated - - -

      Copy and save it as a document in your computer.
       
      • Like Like x 9
      • Thanks! Thanks! x 3
      • gdrill

        gdrill Just enjoying "B"-ing here FBBO Gold Member

        Messages:
        4,461
        Likes Received:
        7576
        Joined:
        May 29, 2013
        Location:
        Stuck in the past, just North of Montana....
        Local Time:
        12:42 AM
        Good call on this. This info is out there but it's always hard to find the "correct" numbers.
         
      • YY1

        YY1 Well-Known Member

        Messages:
        20,404
        Likes Received:
        13197
        Joined:
        Jun 26, 2010
        Location:
        FL
        Local Time:
        2:42 AM
        I found that one, and I'm in the process of reformatting it so the columns line up.

        Wonder if the "drum to drum" difference is because of the width of the shoes.
         
      • moparmarks

        moparmarks I'm just a guy with a screwdriver. FBBO Gold Member

        Messages:
        7,302
        Likes Received:
        3016
        Joined:
        Jul 31, 2011
        Location:
        Western Colorado
        Local Time:
        12:42 AM
        No the drum to drum is in line with the housing widths. Shoe width difference is in the backing plate.
        This is from the Moparts archives. They have another one too which is wrong and I wish they would just delete it.
         
        • Like Like x 1
        • tallhair

          tallhair Rufus "Mod-hair" Firefly Staff Member

          Messages:
          8,147
          Likes Received:
          3523
          Joined:
          Jan 1, 2013
          Location:
          Mascoutah, Illinois
          Local Time:
          1:42 AM
          Great idea YY1
           
          • Agree Agree x 1
          • YY1

            YY1 Well-Known Member

            Messages:
            20,404
            Likes Received:
            13197
            Joined:
            Jun 26, 2010
            Location:
            FL
            Local Time:
            2:42 AM
            Here's what I have so far.

            I rounded some of the 32nd and 16th numbers to make it easier to use, and discarded some of the obscure parts.

            I was trying to figure that drum vs backing plate issue, so drum isn't on there yet.


            Flange Perch
            A body 52 5/8 43
            B body 65-67 54 1/4 44
            B body 68-70 55 44
            B body 71-74 57 7/8 47 5/16
            B body W 71-73 59 7/16
            C body 65-69 56 3/4 46
            C body 70-71* 57 7/8 46
            C body 70-74 59 7/16 46
            E body 56 1/2 46
            M body 54 5/16 44 1/2
            A100 56 3/4
            D100 65-71 58 1/4
            D100 72-74 59 7/16

            - - - Updated - - -

            Guess the forum doesn't like tabs and spaces for column alignment.

            Maybe I'll make a graphic format jpg

            - - - Updated - - -

            My immediate concern is that I just scored a complete E body 8 3/4 with springs, chunk, brakes, everything, and it looks like it's a go for an acceptable tolerance bolt on to my 73 Satellite except for sway bar brackets.

            - - - Updated - - -

            ...and a secondary concern is that I've always wondered if an M body axles would fit an A body...and it will.

            - - - Updated - - -

            M body info is from "Farley's"
             
            • Like Like x 2
            • Cranky

              Cranky Henchman #27 Staff Member FBBO Gold Member

              Messages:
              26,521
              Likes Received:
              26568
              Joined:
              Dec 4, 2009
              Location:
              Down southeast Taxas
              Local Time:
              1:42 AM
              Keep in mind that these guides are not set in stone. Axle widths do vary even in the same year cars and body lines. It's usually not very much but there is a tolerance and sometimes the tolerance was pushed. It just depended on what was happening on the assembly line that day. I used to part cars in the 70's and when I started getting calls for rears and started measuring, I found this out. So if you're looking for something and a 1/4" might make a difference in what you're trying to do, keep that in mind. Get actual measurements before buying.
               
              • Like Like x 3
              • YY1

                YY1 Well-Known Member

                Messages:
                20,404
                Likes Received:
                13197
                Joined:
                Jun 26, 2010
                Location:
                FL
                Local Time:
                2:42 AM
                Agree.

                That's why I rounded the 15/16 and 15/32 measurements.

                I find it much easier to mentally visualize that way.

                ...and thanks to the mods for sticky status.

                When I have time, I'll edit the original post to include an easier to read chart.
                 
              • khryslerkid

                khryslerkid FBBO Gold Member FBBO Gold Member

                Messages:
                25,734
                Likes Received:
                41111
                Joined:
                Mar 10, 2010
                Location:
                Hanover, Pennslyvania
                Local Time:
                2:42 AM
                • Thanks! Thanks! x 2
                • YY1

                  YY1 Well-Known Member

                  Messages:
                  20,404
                  Likes Received:
                  13197
                  Joined:
                  Jun 26, 2010
                  Location:
                  FL
                  Local Time:
                  2:42 AM
                  Finally reformatted quick reference for better viewing-

                  chart cap.jpg
                   
                  Last edited: Dec 2, 2016
                  • Like Like x 3
                  • Thanks! Thanks! x 2
                  • YY1

                    YY1 Well-Known Member

                    Messages:
                    20,404
                    Likes Received:
                    13197
                    Joined:
                    Jun 26, 2010
                    Location:
                    FL
                    Local Time:
                    2:42 AM
                    Should mention that Dakota is 9 1/4.

                    Just had that for reference. Sorry.

                    Notice it's wider than D series.

                    Also, M body would be 8 1/4.

                    Specs for that one's not super easy to find but is awfully close to A body and is good second choice if you have an A and can't find a 65-67 B body 8 3/4.
                     
                  • moparmarks

                    moparmarks I'm just a guy with a screwdriver. FBBO Gold Member

                    Messages:
                    7,302
                    Likes Received:
                    3016
                    Joined:
                    Jul 31, 2011
                    Location:
                    Western Colorado
                    Local Time:
                    12:42 AM
                    Dakota could also be an 8.25
                     
                    • Agree Agree x 1
                    • YY1

                      YY1 Well-Known Member

                      Messages:
                      20,404
                      Likes Received:
                      13197
                      Joined:
                      Jun 26, 2010
                      Location:
                      FL
                      Local Time:
                      2:42 AM
                      Yep.
                       
                    • biomedtechguy

                      biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

                      Messages:
                      28,140
                      Likes Received:
                      41526
                      Joined:
                      Mar 28, 2014
                      Location:
                      South Louisiana
                      Local Time:
                      1:42 AM
                      I had a 1979 Aspen R/T (F-body) w/E58 option Police 360. The 8 1/4 2.72 rear end didn't help it's performance..I bought a 4 speed 73 340 Dart from a junkyard (yeah, I know) and the 8 3/4 housing and axles-everything as an assembly bolted right in to the F body! Even the pins on the perches lined up with the holes in the leaf springs. I later swapped in a chunk from a Charger when the ring and pinion gear broke. I just had to get a "2-way" U-joint to match up the driveshaft's smaller caps and the chunk's larger ones.
                      The point is that the 73 A-body 8 3/4 fit the 79 F-body with no modifications.
                       
                    • moparjohnny

                      moparjohnny Well-Known Member

                      Messages:
                      2,107
                      Likes Received:
                      536
                      Joined:
                      Jan 26, 2011
                      Location:
                      ga
                      Local Time:
                      2:42 AM
                      great idea.good job with this.
                       
                    • biomedtechguy

                      biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

                      Messages:
                      28,140
                      Likes Received:
                      41526
                      Joined:
                      Mar 28, 2014
                      Location:
                      South Louisiana
                      Local Time:
                      1:42 AM
                      Thanks. I signed up on the F-bodies forum and my recounting of that story was met with some controversy, but it happened exactly the way I posted. Seems like they think that 73 A bodies had 8.25 rear axles, but I'm pretty sure it was a 73 Dart Sport, and I am certain that it had a 340. Seemed all original to me. I don't recall how I got the aluminum Aspen R/T wheels to fit the bolt pattern which they rightly say is smaller than the F body (which is the same as the B body). The rear end swap was definitely a straight up bolt in, THAT I am sure of.
                       
                      • Thanks! Thanks! x 1
                      • Glenwood

                        Glenwood Well-Known Member

                        Messages:
                        2,929
                        Likes Received:
                        2880
                        Joined:
                        Jun 19, 2015
                        Location:
                        Kawartha Lakes, Ontario
                        Local Time:
                        2:42 AM
                        I think A bodies went to the larger bolt pattern in 73. I had a couple of 73 dusters and one of them had an 8 3/4 in it. I thought F bodies usually got B body axles as the perch widths are very close.
                         
                      • biomedtechguy

                        biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

                        Messages:
                        28,140
                        Likes Received:
                        41526
                        Joined:
                        Mar 28, 2014
                        Location:
                        South Louisiana
                        Local Time:
                        1:42 AM
                        That bolt pattern factoid would explain why I can't recall anything special that I had to do for my factory aluminum wheels or the B-body Centerlines to fit. The rear axle dropped in, and the pin nibs and holes all lined up with the leaf springs.
                         
                      • Bold & Old

                        Bold & Old FBBO Gold Member FBBO Gold Member

                        Messages:
                        582
                        Likes Received:
                        417
                        Joined:
                        Feb 1, 2020
                        Location:
                        Michigan
                        Local Time:
                        2:42 AM

                        What is a sticky??? like a wedgy but harder to reach?

                        I have heard the term before...:D
                         
                        • Like Like x 1
                        1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
                          By continuing to use this site, you are consenting to our use of cookies.