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Quick rearend Question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by reddog64, Feb 12, 2001.

  1. reddog64

    reddog64 1/2 ton status

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    I have a 78 Jimmy and the glovebox says it has a limited slip in the rear 12 bolt... anyone have any info on this item???

    Um... yes officer I know it's too big...
     
  2. ftn96

    ftn96 1/2 ton status

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    Well, we will need some more direction. What kind of information are you looking for?
    Its good that you have a 12 bolt, and better to have the limited slip than an open differential. And, well, depends on what your looking for.

    Will work for beer, parts and tools.
    90 Jimi,350/700R4/241/10bolts/4.10's/33's/4"
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  3. reddog64

    reddog64 1/2 ton status

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    Can you tell me why this will help and if it's worth keeping or puttin in something else??? if so what??? I rarely go off road... But when I do... Look out...

    Um... yes officer I know it's too big...
     
  4. Wheels

    Wheels 1/2 ton status

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    My 79 came stock with a gov locker (a glorified posi-trac/limited slip) in the rear (12 bolt) and an open diff in the front (10 bolt). Of course both had them wonderful 3.08 gears. For casual off-roading the limited slip works just fine. For more aggressive traction and positive hook up, a locker would probably be better. I'm looking at putting something in the front, mild, not too aggressive. With an open diff, torque will only go to the tire that is spinning giving nothing to the one that isn't.
     
  5. Rebel88

    Rebel88 1/2 ton status

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    It most likely means you have a Gov-Lock in the rear. It is a limited slip. From what I have heard it is not very trustworthy but I have never had a problem with mine. If you upgrade and want to keep a limited slip put and Auburn in it. I believe they are pretty similar but stronger.

    Later

    Have you driven OVER a Ford lately?
     
  6. ftn96

    ftn96 1/2 ton status

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    By all means keep the 12 bolt. The differential unit itself, now thats a whole other canof worms on this site. Im not sure what years the "gov-locs" frequented the chevy 4x4. But if that is what you have, and you dont do any hard core wheelin, then let it ride till you start having problems, but in the meantime start saving some money and replace the differential unit itself, with an Auburn or somethign of the like. OR you can go with a locker or whatever, depends on your taste of off-roading. But like I said, keep the 12 botl less you wanna sell it to me.
    As for the 3.73's, what size tires you running? 3.73's will be ok up to 35's or so. Then again, depends on your flavor of wheelin.

    Will work for beer, parts and tools.
    90 Jimi,350/700R4/241/10bolts/4.10's/33's/4"
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A><P ID="edit"><FONT SIZE=-1>Edited by ftn96 on 02/12/01 10:53 AM (server time).</FONT></P>
     
  7. reddog64

    reddog64 1/2 ton status

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    Yes, I have 35's right now... I want to go to 4.11's They should add a little more torque to the wheels... can i do the rearend with new gears and then the front a month later... Provided I dont put it into 4 wheel lock... different gears would make a mess, i know that....

    Um... yes officer I know it's too big...
     
  8. ftn96

    ftn96 1/2 ton status

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    yeah boss. Im doing the exact same thing right now as we speak. Im building the rear with 4.10's and an Auburn limited slip. then wehn I get some MO money, probably next month, then Im gonna install the 4.10 in the front with a new powertrax lock-right. And I went ahead and disconnected the front driveshaft just to make sure my dumb ass didn't get drunk adn decide to go wheeling and forget about the gear difference. Better safe than sorry.

    Will work for beer, parts and tools.
    90 Jimi,350/700R4/241/10bolts/4.10's/33's/4"
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  9. Stoopalini

    Stoopalini 1/2 ton status

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    Yea, your fine with different gear ratios as long as you don't engage the 4WD.

    I am currently running 4.10 in the rear and stock (3.08?) in the front. It's been like this for about 2 weeks now and I haven't had a problem. Still searching .............

    You could technically engage the 4WD if:

    1) all 4 tires are in the air
    2) you're in VERY soupy mud .... to the point that the front tires could spin at a different ratio than the rear without putting too much strain on the T-Case.

    Thomas.

    -- '84 K5 Blazer --
    <A target="_blank" HREF=http://Stoopalini.coloradok5.com>http://Stoopalini.coloradok5.com</A>
     

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