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Old 09-06-2008, 05:06 PM   #1
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Default Posi for front axle?

I dont know much about the front drive axle on my z71, and IM planning on a posi for the rear, wanting one for the front too.

will the G80 fit the front, or what do I need?
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Old 09-06-2008, 05:11 PM   #2
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The gm transfer case will not support a posi or locking differential. Just put a good unit in the rear!
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Old 09-06-2008, 06:34 PM   #3
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There is nothing available for the stock diff. The 9.25" 3/4 ton front differential has an E-locker available for it. I'm not sure what it would take to swap to the 9.25.
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Old 09-06-2008, 07:29 PM   #4
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There is nothing available for the stock diff. The 9.25" 3/4 ton front differential has an E-locker available for it. I'm not sure what it would take to swap to the 9.25.
Quite a bit unfortunately, I looked into that already. The two differentials have a completely different setup for mounting the diff housings to the frame/suspension. One would need a custom lift to make new brackets that hold the diff housings.

To those of you who have looked into locking the front differential, is there anything like the S-truck posi-lock cable operated system? In the S10 4x4, for example, we have the option to replace the vacuum actuated locking system with a cable inside the cab to lock both axle shafts in place. Does the 1/2 ton not have this function? We also have the Lock-rite locker too, so most go that route anyways.
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Old 10-17-2008, 10:26 AM   #5
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I have a feeling someone is gonna pull something outta the bag one of these days....................
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Old 10-22-2008, 08:47 PM   #6
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I don't think the cable does what you think it does. the cable replaces the vacuum actuator which locks in the front axle but the axles together. the 8.25 doesn't have a locker avaliable for it. detroit e locker was working on something a couple year's ago but it got axed.
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Old 10-23-2008, 12:54 PM   #7
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Theres nothing for the 1/2 tons, the diff/cv's wont hold together with a locker.

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To those of you who have looked into locking the front differential, is there anything like the S-truck posi-lock cable operated system?
They make the posi-lock for fullsize trucks too but it will still be an open diff, the posi lock just engages the 4wd like stock but instead of electronically its with a cable.
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Old 10-23-2008, 12:55 PM   #8
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I have a feeling someone is gonna pull something outta the bag one of these days....................
Eaton has one, but it was just prototype and they couldnt keep them together.
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Old 10-24-2008, 09:41 AM   #9
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A guy here locally took his apart and welded the bish up hahahaha (not recommended)
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Apparently I am not correct. It appears that they are 4 speeds no matter how you slice it. Thanks for keeping the site with the same spirit as always.
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Old 10-24-2008, 10:23 AM   #10
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Yeah, the posi-lok cable only changes how the front axle engages, I had one on my 94 1/2 ton sub and it worked well. There are no posi's or lockers available for the 8.25 ifs diff. Your best bet is to get a locker out back and not worry about the front. The front diffs, and cv axles are notorious for blowing up when you put lockers in them. There just not strong enough to get used that way.
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Old 10-24-2008, 10:23 AM
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2500hd, 825, actuator, axle, diff, differential, drive, front, gm, ifs, locker, locking, posi, s10, silverado, stock, truck


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