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Ring, Pinion gear Questions

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Heath-La. 89GMC, Dec 18, 2000.

  1. Heath-La. 89GMC

    Heath-La. 89GMC 1/2 ton status

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    Ive got a question? My 89 has 10 bolt 8.5" gears front and rear. If I find a ring and pinion gear set out of a front 10 bolt.. will it work in the rear? Im only gonna use the ring and pinion gears.. not the carriers or any of that stuff.. gears only. I ask this because I found the 2 gear sets I need.. but they are both out of front axles. If the gears are the same for front and rear... Im just gonna buy the 2 front sets. (gettin a good deal on them)if the gears wont work in the rear.. ill just have to find some others. thanks
     
  2. ftn96

    ftn96 1/2 ton status

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  3. nyyef

    nyyef 1/2 ton status

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    dont quote me, and if i am wrong i guarantee someone will correct me.
    i think they do work. i was reading that a drawback of the chevy front 10 bolt (i dont know if this applies to other diffs) is that they use the same gears, so they are reverse rotation relative to the rear. its like the gears are driven in reverse when you engage 4wd. not as durable because they are designed to rotate reguraly in one direction.
    please dont change them just because of this post...LOL

    Knife.
    knife.coloradok5.com
     
  4. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Yes, the front and rear gears out of a 10-bolt are the same. The one advantage to using used gears out of the front is that they usually have very few actual miles on them.
     
  5. nyyef

    nyyef 1/2 ton status

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    yeah your right, only the reverse side of the ring will be worn if you put them in the rear...hahaha

    Knife.
    knife.coloradok5.com
     
  6. Heath-La. 89GMC

    Heath-La. 89GMC 1/2 ton status

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    Thanks guys.... You know, this board is like Christmas morning, You post at night and cant wait to get up the next morning and see what you got.. lol.. thanks
     
  7. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Well, my point was that most 4x4's probably spend at least 95% of the time on the road in 2wd...which means that the front gears are not turning at all.
     
  8. Heath-La. 89GMC

    Heath-La. 89GMC 1/2 ton status

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    Then.. i guess the front gears are the way to go for replacing the rear.. itll be almost like having new ones. thanks
     
  9. Executioner

    Executioner 1/2 ton status

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    I hope your not the one installing the ring and pinion ?
    If so will will have many, many more questions !
     
  10. Heath-La. 89GMC

    Heath-La. 89GMC 1/2 ton status

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    What kinds of questions? Ive installed them before.. just never in my Jimmy. Am I gonna have problems putting the ones out of the front in the rear? My only concern was that they were the same. Ive never really delt with GM differentials.
     

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