Factory Buick Rear Differentials, What Were They Thinking?

Discussion in 'Got gears?' started by 70aqua_custom, Dec 8, 2015.

  1. monzaz

    monzaz Jim

    Not to knit pick on some of the info listed but... Dana 60 is only 1.625 same as 12 bolt Chevy, 12 bolt Olds, 8.8 ford etc. 10 bolt 8.25 from 68-70 is actually bigger 1.875 which would be the same as MOPAR 8.75 rear. 489 case.

    •Buick 8.2 uses an oversize bearing and cap on the ring gear side of posi unit for strength This was not true and did not work... the bearing caps is actually thinner over the larger driver side carrier bearing... The thought was there the design just did not do the trick. THAT is why it does not exist anymore. Neat thing about the 68-70 Buick casting is that it was a VERY stout ribbed casting inside the case... as stated the pinion was offset lower to create better contact for the ring and pinion.

    These Buick 4 pinion 8.2 posi carriers had different spline side gears (this is also not correct, Side gear spline is the same 28 spline axles and same as Pontiac and 12 bolt olds 28 spline 60 degree spline. )

    NO ONE person will ever be perfect in the info... there are typos from being human and there is just too much info to handle to get it all right. ALL my info is from actual parting out and measuring and fitting parts with other carriers and fitting parts in many different applications. I am still learning everyday about NEw rear ends being made and even the old rear ends still out there.... Might be why I still enjoy working on them. I am still creating NEW units from other units we machines to retro fit into rears that do not have units to fit.

    I have seen SOME strange stuff in rears that you just would not believe... 8.5 posi units in 10 bolt 8.2 Pontiac housing with 2 series gears from 1971 72 era and it all fit and working in the car...lol. I drove the car and gave the guy the money for the rear than parted it out ...lol. Could not believe it. Someone did it and it is certainly NOT correct BUT it did function - :)

    Anyway...Not here to brawl over the details just trying to get the info that is out there as correct as possible.

    HAPPY HOLIDAYS AND NEW YEAR TO EVERYONE!

    Jim
    J D
     
  2. ctlikon

    ctlikon Well-Known Member

    "Anyway...Not here to brawl over the details just trying to get the info that is out there as correct as possible."

    I wouldn't take it that way Jim. Thanks for clearing up some of what I found and posted. One of the links I posted was your site which is very helpful and informative.
    We appreciate your input.
     
  3. monzaz

    monzaz Jim

    Yes i saw that... BuT I even know my site has some mistakes that I have not been able to correct yet as My nephew has the access to the site and I am at the mercy of the young man and his time... :) Looks like marriage is in the works real soon too. I need to get the control back... I have a list of changes for the ID info section.
    Appreciate not rubbing the wrong way on some corrections....

    Jim
     

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