what vehicles can I scavange a series 3 posi carrier from for my 72 skylark?

Discussion in 'Got gears?' started by 72 blue skylark custom, Jun 19, 2019.

  1. Ok this is probably beating a dead horse but since I cant find it on a forum search, what vehicles can I grab a posi carrier from that will fit my stock rear end. I have a set of 410 gears given to me and I only have a series 2 one wheel peel. Any help would be appreciated. thank you.
  2. 72STAGE1

    72STAGE1 Runnin' with the Devil

    You need to know what your stock rear-end you have to start with, an 8.2 or 8.5 or a 8.5 BOP or Corporate.......these are all possibilities and none inter-change with each other and some can carry thru like a 8.5 Buick can carry from a 2:43 to a 3:23 I believe and then a 3;31 thru a 4;10 .....Others like MONAZ know exactly, but again we have to know what you have housing-wise first.
  3. Bigpig455

    Bigpig455 Fastest of the slow....

    From your user name, lets assume you have an 8.5 in a 72 Skylark. It's very, very rare to find a 3 series posi in a boneyard these days, but I would look at mid 70's-mid 80's GM trucks and wagons. You need to be able to visually identify the posi, there are threads out here but the most common will have an 8 stamped near the ring gear bolts. See this article: http://www.buickperformanceclub.com/posi.htm

    If you cant find one of these, you can grab a 3 series 8.6 posi out of a early/mid 90's truck, wagon or police car. It'll fit your housing, and you can probably find one that comes with a 3.42 or 3.73 ring and pinion, but you'll have to buy new axles to match the side gear spline count.

    Your best bet is to buy a cheap off brand Yukon from one of the vendors here on the board (Everyday Performance, Monzas, Brian Trick) - it's new and will bolt right in. They can also put together a package with bearings and a good performance ring and pinion for a reasonable price.
  4. BrianTrick

    BrianTrick Brian Trick

    Do NOT use a gov-lock posi,which you normally find in trucks and vans.
  5. Thank you guys, so look for a truck or get help from the right people.
  6. Bigpig455

    Bigpig455 Fastest of the slow....

    Well, much more than that -first, understand what you've got. Then if you go searching yourself, educate yourself. know how to ID the correct junkyard axle, and then ID the correct junkyard posi.
  7. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

  8. BrianTrick

    BrianTrick Brian Trick

    Where are you located?

Share This Page