Announcement

Collapse
No announcement yet.

57-64 olds/pontiac 9.3 rear axle

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • 57-64 olds/pontiac 9.3 rear axle

    so brother patrick pulled one outta his stash for me, gotta clean it up
    and run some numbers to see what exactly i got here.. no wonder
    its the 'go to' for lotsa old school builds, this thing is gnarly. kinda
    like an extra large really heavy ford 9".

    plans are to either stuff it under the 55 plymouth unless its got some crazy
    5:86 gear or something, then maybe flip it to someone else doing a similar build.

    he also found two 52 chevy 15x5 rims with caps & rings. so awesome, gonna
    clean em up/paint them and drop some 205-70s on for the front end, then
    the 15x4 ansens with matching 10s can go up for sale.

    pics shortly....
    STINEY likes this.

  • #2

    Re: 57-64 olds/pontiac 9.3 rear axle

    bummer! its a 60" wide unit, must be from a big car like
    b'ville, delta88,etc.... so not sure if i want (or can afford...)
    to go thru the hassle of narrowing it.

    *sigh* figure out a way around one problem/make 5 more.......

    Comment


    • #3

      Re: 57-64 olds/pontiac 9.3 rear axle

      Radius the wheel wells, problem solved. Those rears were almost always run full width.

      STINEY and oletrux4evr like this.
      My fabulous web page

      "If it don't go, chrome it!" --Stroker McGurk

      Comment


      • #4

        Re: 57-64 olds/pontiac 9.3 rear axle

        it's lots cheaper to narrow an axle as opposed to widening one. when I narrowed the Ford axle for the Fiat, it cost me $125 to have the axles resplined, rewelded the ends on when it's narrowed is not that terribly difficult (hell, if I can do it, you might be able to too)
        Doing it all wrong since 1966

        Comment


        • #5

          Re: 57-64 olds/pontiac 9.3 rear axle

          Radius the wheel wells, problem solved. Those rears were almost always run full width.
          I'd guess this depend on the rules in his area and if they enforce them. If the tire be partly outside the body.
          That be a no go, here.

          Comment


          • #6

            Re: 57-64 olds/pontiac 9.3 rear axle


            I'd guess this depend on the rules in his area and if they enforce them. If the tire be partly outside the body.
            That be a no go, here.
            yep, same here--no part of tire including sidewall ( wtf....) can protrude
            past the fenders. and TONS of other [email protected] laws...

            Comment


            • #7

              Re: 57-64 olds/pontiac 9.3 rear axle

              so im at a crossroads here... ive got 3 rear axles to choose from for
              the 55 plymouth gasser project. choices are--

              1) a 1967 chevelle 12 bolt. needs backing plates/brakes/drums but otherwise complete,
              AND it was overhauled end to end and never run. 3:73/posi. fairly strong but probably
              the weakest of the three i have....i bet a girdle cover would help.

              2) 8.75 mopar from a 72 duster. needs backing plates/brakes/drums AND shafts. ouch.
              also overhauled/never run. 3:55/posi. pretty strong, and has the '489' center. all the
              8.75's had nodular centers & 30 spline factory....

              3) the 9.3 from 57 olds. unknown gear yet (havent dragged it out to mess with yet)
              needs nothing to run BUT what if its got 5:87 gears or something? it IS fairly bombproof though....

              right now either the 12 bolt or the 9.3 (again depending what gear it has) are looking
              like the way to go as shafts for the 8.75 alone are $300-$450+.

              any ideas/advice? if $$$ was no object id shorten a corporate 14 bolt, those things are
              ridiculously stout. but i gotta use what i got, so....???
              anyone? bueller? bueller?? bueller???

              Comment


              • #8

                Re: 57-64 olds/pontiac 9.3 rear axle

                Keep your, mopar, mopar.
                But really, I'd guess, whatever one the width of it, works best.
                I would've thought a duster would've had the 7.5 rear. Didn't most dusters come with a slant 6.

                Comment


                • #9

                  Re: 57-64 olds/pontiac 9.3 rear axle

                  Keep your, mopar, mopar.
                  But really, I'd guess, whatever one the width of it, works best.
                  I would've thought a duster would've had the 7.5 rear. Didn't most dusters come with a slant 6.
                  as the 55 is getting a 468" tunnel ram rat motor & a muncie, it may be a little late
                  to stay all mopar...this duster had a 340, unknown if the motor/trans/rear axle
                  were factory issued or if someone swapped em in there, but thats what was in
                  it when we stripped it. (was BADLY T-boned, passenger floor pan was scrapping
                  against driveshaft when it drove--yes, DROVE--into the garage.yikes! )

                  the 8.75 is a tad shorter than the other 2, but also needs the most parts to
                  finish it-backing plates, parking brake cables, brakes, drums, and the aformentioned
                  axle shafts. that means out of the 3 its the one thats going to cost the most to get
                  useable. that in itself kinda makes it the 'bronze medal'....

                  Comment


                  • #10

                    Re: 57-64 olds/pontiac 9.3 rear axle

                    The Oldsmobile rear ends were very tough.... the hot ticket back before Chevrolet went to the ten and twelve bolt rears check out the HAMB for a good discussion on this very topic!
                    Last edited by silver_bullet; February 10th, 2020, 01:25 PM.
                    Patrick & Tammy
                    - Long Haulin' 2008, 2009, 2010, 2011, 2012, 2014...Addicting isn't it...??

                    Comment


                    • #11

                      Re: 57-64 olds/pontiac 9.3 rear axle

                      ok, a quick check says either posi or a locker of some sort, and has the yoke turning
                      around 5-1/2 times for a single turn of the drum, so im guessing it is a 5.57 gear. booo!

                      oh well, that decides it--the 12 bolt it is! i will drag the 9.3 over to bobbys house, maybe
                      he will stuff it under his new to him 66 elcamino--he can afford to regear if he wants to.
                      silver_bullet likes this.

                      Comment

                      Working...
                      X