What modern rear end is comprable to my 72 Skylark ( I need help plz)

Discussion in 'Got gears?' started by Gtivalencia34, Jun 9, 2019.

  1. Gtivalencia34

    Gtivalencia34 Member

    Hello, my diff was shattered 2 days ago so now I need the whole rear end. First of all, I cannot find one in the Raleigh, NC area and I cannot rebuild because there is a huge hole in the diff. What modern or other GM rear end will be plug and play, I prefer it to be posi, but I can live without it.

    Your help is greatly appreciated!
  2. hugger

    hugger Well-Known Member

    There is no Modern bolt in rear,...I'm in Spartanburg about 5hrs away and have a few 8.5 rears none are posi,..we have two forum members that have,..build and ship 8.5s for around $1800 to 2k

    I'll sell a complete 8.5 open for $375
  3. Gallagher

    Gallagher Founders Club Member

    By modern, do you mean aftermarket?
  4. BrianTrick

    BrianTrick Brian Trick

    What exactly shattered,and what exactly got damaged?
    I sell complete rebuilt 8.5” 10-bolts,all new parts,for $1400.0 plus freight.
    You can upgrade to Moser 30-spline shafts,and it would be $1800.00 plus freight.
  5. Gtivalencia34

    Gtivalencia34 Member

    @Brian, I was driving at low speed ( 25mph) and heard a big boom and when I parked I looked underneath the car and the diff was leaking and had a hole in it. So, I need to replace the whole rear end.

    @hugger, does that include the whole rear end or just the diff?
  6. Gtivalencia34

    Gtivalencia34 Member

    I guess, my 2nd question would be, what other GM rear end will fit my 72 Buick?
  7. flynbuick

    flynbuick Super Moderator Staff Member

    What you need is called a rear end assembly "drum to drum".
  8. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    What's the difference between a modern rear and what came in your 72?
  9. hugger

    hugger Well-Known Member

    Drum to drum complete
  10. 12lives

    12lives Engage! - Jean-Luc Picard

    Your rear is fairly common as it was used in 71 - 94??? Buick Chevy Pontiac and Olds midsize cars. and Jimmy/Blazers (check the width though) Is there a scrapyard near you? Worth a look. or Hugger's - only 5 hr drive.
    Last edited: Jun 10, 2019
  11. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    Virtually any rear from a 64-72 A body (Chevelle/Cutlass/Lemans/Skylark) will bolt in. The original rear in your car should have been an 8.5 if it was a 10 bolt rear. That is an excellent tough rear, hard to believe you grenaded it like that unless it was very low on oil. Some Skylarks came with a Chevy 12 bolt. Count the rear cover bolts.
  12. BrunoD

    BrunoD Looking for Fast Eddie

    I have a 71 rear,all done up,ready to install,with 373 posi,new gears,it was used in my son's car for about 50 miles,he found out that I had a 342 71 posi,that's what came with his car new,so we exchanged rears.I want $1.000.00 for it,plus shipping.This is guaranteed to work good.as I already know it does.Bruno.
  13. DasRottweiler

    DasRottweiler -BuickAddict-

    Get a GM Corp 8,5 A-body specific. 28 spline will be just fine into the 12s , possibly high to mid 11s. Get a posi with gears specific to your driving style, ie:, street, hiway , track. Talk to Brian Trick. JDrace (monzaz) to get parts for rebuild or be prepared to pay $1000-$1800 for a rebuilt plug n play. Jim
  14. Quick Buick

    Quick Buick Arlington Wa

    Never blew a hole in a RE. Most damage I ever done to one (besides trashing the life out of the truck) was I lost the pinion nut and the pinion jammed into the ring. Locked up the rear wheels at about 35mgh. Funny thing broke a few gears in half pounded the pinion back in drove that truck till the motor died.
  15. BrianTrick

    BrianTrick Brian Trick

    It sounds like the cross shaft came out and went through the cover.
    Do you have any pictures?
  16. steve covington

    steve covington Well-Known Member

    Local yard to me has several 71/72 Skylarks with standard rears. They would need freshening up (new seals, brake cylinders, brake shoes). Last time I checked he only wanted $275 for complete rear. Probably lower! I'm on good terms with all 3 generations that work there. PM me if interested...(click on my icon to link to me, then "Start conversation")

    This is only about 2 hours from you.
  17. Ryans-GSX

    Ryans-GSX Have fun, life is short.

    Gtivalencia34, Steve Covington is not but about 2 hours out of Raleigh and he knows some great yards to get parts from. Get a truck and go down to pick one up.
  18. monzaz

    monzaz Jim

    I have a 8.5 to build here. Housing was just blasted. PM if interested.
  19. flynbuick

    flynbuick Super Moderator Staff Member

    If you want the better rear, you need a 71-72 A body set up.
  20. monzaz

    monzaz Jim

    Pretty sure that is what he BLEW UP.... LOL

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