what kind of rearend dose my 70 gs455 have

Discussion in 'Got gears?' started by CARHEX1, Aug 4, 2009.

  1. CARHEX1

    CARHEX1 Founders Club Member

    dose anybody know what they came with 8.5? 8.2? my 70 gs 455?all big block chevelles came with a 12 bolt. wouldent a big block buick have a beefer rearend also. I know gm started puting 8.5 in 71 but being a bbb 70 is it a better rear than a 8.2? im getting a 72 parts car that should have an 8.5 so if i have an 8.2 im swaping it out. im also planing on swaping out the disc and front arms. if the bushings are good. any tips on where i could find a posi? and gears cheep free or on a trade.:beers2: i heard alot of cars and trucks at the bone yard had posi and gears that will fit the 8.5 is that true? anybody have a list of what to look for?:eek2:
     
  2. flynbuick

    flynbuick Guest

    Unless it is a Canadian car it came with a 1968-70 Buick 8.2 rear.
     
  3. CARHEX1

    CARHEX1 Founders Club Member

    fremont car 8.2 ok so im swaping out the rear for the 8.5 should i save that 8.2? anything special about it?:3gears:
     
  4. flynbuick

    flynbuick Guest

    Non stage 1 auto trans GS 455 car in 70 was a default 2.93 ratio as I recall. Confirm my memory plus it could have an optional raatio or it could have beem changed along the way. Reomve the cover and look on the side of the ring gear for the numbers that indicate the ratio.
     
  5. CARHEX1

    CARHEX1 Founders Club Member

    thanks one thing when i jack up the rear it spins both tires and when i try to hold the driver side tire i cant? it wants to spin:Do No: do you think it could be worn out the slon musem said my car came with some kind of tow package? what was that?
     

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