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locker vs. posi

This is a discussion on locker vs. posi within the Performance forums, part of the General Discussion category; i got a 93 c1500 nv3500 350. i drive on and offroad posi or a locker ????????...

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    locker vs. posi


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    i got a 93 c1500 nv3500 350. i drive on and offroad posi or a locker ????????

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    Supporting Gold Member GreaseDog's Avatar
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    Re: locker vs. posi

    get something that replaces the entire carrier whatever you get. posi will be more street friendly, but the locker will be better off road. its a matter of give and take.
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    Not Really Bob
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    Re: locker vs. posi

    Eaton posi or Tru Trac. Detroit lockers are too expensive imo. Too expensive for a ten bolt. If you have a 14 FF the price is right, plus it's basically your only option for posi/locker.
    Last edited by bigbob6988; 09-04-2010 at 07:45 PM.
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    Registered User custm2500's Avatar
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    Re: locker vs. posi

    If you are a weekend wheeler and don't beat it too hard then a posi is your best bet. Doesn't have teath to chew up on the street and the clutches will last half of forever.

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    Re: locker vs. posi

    Quote Originally Posted by custm2500 View Post
    If you are a weekend wheeler and don't beat it too hard then a posi is your best bet. Doesn't have teath to chew up on the street and the clutches will last half of forever.
    I agree about the lockers, here is a link of the Eaton Detroit Locker and it has very similar "dog-teeth" that must ride on each other when the locker is "unlocked" like when turning coreners. These will eventually wear out, just liek the Lockrite from Powertrax.
    http://www.eaton.com/EatonCom/Produc...cker/index.htm

    Here is teh Eaton posi
    http://www.eaton.com/EatonCom/Produc...iLSD/index.htm
    I do hear of these wearing out, and IIRC, the carbon fiber clutches cant be used with the optional 800lb preload springs.

    and the True trac "torsen design"
    http://www.eaton.com/EatonCom/Produc...trac/index.htm

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    Re: locker vs. posi

    Have you considered any of the lunchbox lockers? They act just like a Detroit. Never tried any myself, but from what i understand they are strong enough for 90% of people, cheaper, and easier to install.

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    Registered User SierraDan's Avatar
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    Re: locker vs. posi

    Always heard good things about the True Trac torsion differential. Buy one of those, but weld the spider gears together on the stock open rear in the mean time and see how long it'll last

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    Re: locker vs. posi

    I would get a posi, not a locker. But its up to you.

    Quote Originally Posted by bigbob6988 View Post
    Eaton posi or Tru Trac. Detroit lockers are too expensive imo. Too expensive for a ten bolt. If you have a 14 FF the price is right, plus it's basically your only option for posi/locker.
    Auburn and Detroit are the only options I know of for a 10.5. An Auburn is like 700 bucks though. But thats what Im going to end up with in mine, I dont want a full detroit with a loose converter, it'll be locked any time the truck is moving.

    Quote Originally Posted by wyo_driver4 View Post
    Have you considered any of the lunchbox lockers? They act just like a Detroit. Never tried any myself, but from what i understand they are strong enough for 90% of people, cheaper, and easier to install.
    I wouldnt.
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    WV Jeeper 94_c/1500's Avatar
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    Re: locker vs. posi

    The lunchbox lockers are really for someone on the cheap side without alot of power and not alot of use.

    When you say you drive on and offroad, how much do you do? Is it mostly street or mostly offroad? What is your idea of offroad?

    If you want all out offroad performance, then the locker would be better choice. The only real option for a locker is a Detroit Locker. I've never heard of anyone breaking one. But I have heard of people breaking a lunchbox locker or their factory carrier using a lunchbox locker.

    If the truck sees mostly the street and when you offroad its nothing extreme a limited slip would be fine.

    If you have enough money and still can't decide, then maybe a selectable locker is a good choice for you.
    Last edited by 94_c/1500; 09-05-2010 at 02:14 PM.

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    Re: locker vs. posi

    i think im puting a 3/4 ton 14 bolt in the rear but that mite be alittle...... im thinking a limited slip.. i heard bad things bout lockers in the winter.

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    WV Jeeper 94_c/1500's Avatar
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    Re: locker vs. posi

    Lockers would help you out in deep snow, but on ice and packed snow they can be a bit tricky.

    There are 2 3/4 ton 14 bolts that came in these trucks. One is semifloating and one is full floating. Neither of them came in the 2wd 1/2 ton lug pattern.
    Last edited by 94_c/1500; 09-05-2010 at 04:00 PM.

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    Re: locker vs. posi

    idk if its full or semi its coming out of an truck a gen before this truck to. im getting some noise out of the transmission to a very low deep grounding sound when letting off to go around a bend.

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    Supporting Gold Member GreaseDog's Avatar
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    Re: locker vs. posi

    Quote Originally Posted by 94_c/1500 View Post
    There are 2 3/4 ton 14 bolts that came in these trucks. One is semifloating and one is full floating. Neither of them came in the 2wd 1/2 ton lug pattern.
    wrong. 454 SS trucks came with a 14SF with a 5 on 5 lug pattern... aftermarket shafts are available, so its completely possible to build one using a 6 lug 3/4 ton 14SF.
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    Registered User Stoked's Avatar
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    Re: locker vs. posi

    Personally, I would never run a lunchbox locker in any rear application.I just don't think they are strong enough, and by the time you've blown up the first one and replaced it, you could have had a full carrier replacement locker or limited slip.
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    Re: locker vs. posi

    Quote Originally Posted by GreaseDog View Post
    wrong. 454 SS trucks came with a 14SF with a 5 on 5 lug pattern... aftermarket shafts are available, so its completely possible to build one using a 6 lug 3/4 ton 14SF.
    I almost said something about the SS rearend, but he did say a 3/4 ton 14 bolt so I didn't bother saying anything about it.

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    Re: locker vs. posi

    i have just alittle over 200000 miles on 1 trany, 1engine, i clutch.

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    Re: locker vs. posi

    o and it had the **** beat OUT of it!!!!!!!!!!! over heated 3 times in 1 day and it still runs till this day!

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    Re: locker vs. posi

    Quote Originally Posted by GreaseDog View Post
    454 SS trucks came with a 14SF with a 5 on 5 lug pattern... aftermarket shafts are available
    Where?

    14SF 5 on 5" shafts for the 454SS trucks have been discontinued for years , Dutchman was reportably making them but any phone call to them resulted in a "no we do not have an application for them". Moser will cut and respline original shafts as I have a set of those in my shop awating install into a 454SS rear that I narrowed.They will not custom make new ones.

    Anyway back on topic, Detroit locker hands down , especially if you plan on any power in the future.

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    Last edited by Nasty-Z; 09-06-2010 at 05:53 PM.
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    Registered User wpb0104's Avatar
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    Re: locker vs. posi

    Posi is the way to go. i have a 90 silverado with 38s and 4.10 gears with a brute posi carrier in the rear and i love it. its so smooth and it works great. so much better than a stock locker or detroit locker. plus its cheaper. id say if you are gonna get a posi put it, go ahead and put new gears in too. you might as well since you are getting it setup. might save you time and money later

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    Re: locker vs. posi

    Unless you are flexing your truck to the max, running in deep snow/mud/crud, then get a limited slip like the Detroit True Trac.

    Otherwise get a Detroit Locker.
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