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changing gears in a govlock

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by outlaw612, Nov 24, 2001.

  1. outlaw612

    outlaw612 1/2 ton status

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    Can I change to 4.10's or 4.56's , I currently have a 3.73 geared govlock.

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  2. Blue85

    Blue85 Troll Premium Member

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    Is this a 10-bolt axle? If so, then yes, your existing carrier would work. The fact that it's a Gov-Lock doesn't really change this. The gear set up procedure is exactly the same.

    <font color=green>There's nothing like the smell of a rich V-8 in the morning...</font color=green>
     
  3. Blue85

    Blue85 Troll Premium Member

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    I should mention, though, that it might be cheaper and easier to swap the whole axle. 10-bolts were available in 4:10 Gov-Lock. You might also want to look into a 3/4-ton upgrade and just swap both axle assemblies. Remember that you're looking at over $200 per axle in parts and at least $200 again per axle for the setup labor, which makes a pair of 3/4-ton axles look pretty cheap, especially if the junkyard will give you a break for giving back your matched set of axles.

    <font color=green>There's nothing like the smell of a rich V-8 in the morning...</font color=green>
     
  4. outlaw612

    outlaw612 1/2 ton status

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    Sorry, I should have been more specific. Im doing this in a 14ff. I have 2 of them, 1 with 3.73 govloc and Im also looking for a 4.10 or 4.56 open or posi carrier because I dont have a carrier in the other 14.

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  5. HarryH3

    HarryH3 1 ton status Author

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    The carrier break for a 14 bolt FF is between 4.10 and 4.56. So you can install 4.10's on the 3.73 carrier. You'll have to find a different carrier if you decide to go with the 4.56's.

    <font color=black>HarryH3 - '75 K5</font color=black>
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  6. outlaw612

    outlaw612 1/2 ton status

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    Thanks Harry. I had someone tell me about Thick ring gears so the 4.56 would work, I cant remember who it was. Have you ever heard of this?

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  7. DesertDueler

    DesertDueler 1/2 ton status

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    Yea you can use either thick ring gears or spacers to make up for not having the right carrier. What the thick ring does is move the gear farther away for the carier and closer to the pinion becaue the pinion on higher numerical gears are alot smaller.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  8. outlaw612

    outlaw612 1/2 ton status

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    So I can just tell the gear company that I need the thick gears? Is there a specific supplier anyone can reccomend?

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