308 posi good on highway?

Discussion in 'Got gears?' started by chrisc1541, Jul 27, 2010.

  1. chrisc1541

    chrisc1541 chrisc1541

    i'm looking at a posi rear end on craigslist it has 308 gears i drive my car on the highway daily in the summer about 75 miles round trip and 100 miles round trip on the weekends how will the 308 rear end do under those conditions
     
  2. DaWildcat

    DaWildcat Platinum Level Contributor

    Perfectly suited for the job unless you have an overdrive transmission.

    Devon
     
  3. chrisc1541

    chrisc1541 chrisc1541

    no overdrive 3speed auto with a shift kit
     
  4. DaWildcat

    DaWildcat Platinum Level Contributor

    Make sure it's exactly as advertised then go for it. You'll want to inspect first to make sure it's truly a posi, then the gear wear pattern, backlash if possible and clutch pack breakaway torque.

    Devon
     
  5. RapidRick

    RapidRick Can't spell Buick w/o U+I

    X2 :TU:

    ...I agree with Devon, as I have the 3.08's with the original G80 code limited slip unit in my GS.
     
  6. chrisc1541

    chrisc1541 chrisc1541

    i have no idea how to do any of what you said i'm an electrician with enough mechanical ability and knowledge to basically follow the directions in the service manual
    the only way i know to check for posi is to spin the tires with rear end jacked up making sure both tires spin the same way (i think)
     
    Last edited: Jul 27, 2010
  7. DaWildcat

    DaWildcat Platinum Level Contributor

    Well, that's a start. In this case you need to consider buying with the understanding that it may need to be rebuilt, no small cost there.

    Devon
     
  8. chrisc1541

    chrisc1541 chrisc1541

    i have am almost betting it will need a rebuild the asking price is $350
    and i found another for $275 and the ad reads as follow

    2.78 Posi rear end for GM A&G body. This is a BOP 8.2 10 bolt, captured bearing axles (no c-clips). With 534G U-joint, and verified drive shaft length, will fit:
    1968-1972 Buick Skylark GS Stage1

    so i may look at this one also
     
  9. DaWildcat

    DaWildcat Platinum Level Contributor

    Be aware that from strength and parts availability standpoints a later 8.5" rear will be superior to the 8.2".

    Devon
     
  10. chrisc1541

    chrisc1541 chrisc1541

    i think i will be doing a lot more research on this before buying anything
    thanks for the advice
    and also can you point me in the right direction on where to find the info i need to better educate myself on this subject?
     
  11. DaWildcat

    DaWildcat Platinum Level Contributor

    Tons of info right here in the "got gears" forum. Get creative with search terms and you'll have hours of reading.

    Devon
     
  12. chrisc1541

    chrisc1541 chrisc1541

    thank you again i'll do that
    :beers2:
     
  13. Golden Oldie 65

    Golden Oldie 65 Well-Known Member

    The quickest way to tell if it's a posi is to have someone hold one wheel while you try to turn the other one. If you can't turn it, it's a posi. If you can turn it it's either not a posi or it's shot. If you don't plan to use it for drag racing or any other consistantly abusive behavior then an 8.2 is fine.
     
  14. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    http://www.buickperformance.com/85rear.htm
     

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