Technical Info: G80 Locking Rear Differential - Chevrolet Colorado & GMC Canyon Forum
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Old 03-23-2009, 04:09 AM   21 links from elsewhere to this Post. Click to view. #1
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Technical Info: G80 Locking Rear Differential




A Quick Look At How It Works...

We'll start by pointing out that the Locker is a speed sensitive design. That is, it reacts to wheel slip by sensing when one wheel is spinning substantially faster than the other.

So, when you're cruising along on clean dry pavement, the locker operates like any regular open differential.

But, as soon as wheel slip happens, going forward or reverse, the locker immediately kicks in. Here's how.

The differential is set up with a flyweight governor that responds to differences in wheel speeds, and disc packs that are mounted between the side gear and the case.

Whenever one wheel is spinning substantially faster than the other, the governor spins rapidly, causing the flyweight to open. That flyweight then catches on a latching bracket and the lockup process begins.

During lockup, a self-energized clutch system causes a cam plate to ramp against a side gear. This ramping action compresses those disc packs mentioned earlier. The ramping continues until both axles - and therefore both wheels - are spinning at the same speed. This is full lock, and it prevents any further wheel slip. (Note: Axle lockup can only occur at speeds below 20 mph.)

The entire lockup process takes about a split second, and is virtually unnoticeable by the average driver. When both wheels regain traction, unlocking occurs and things go back to normal.


Eaton Locking Differentials


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Old 03-23-2009, 11:11 AM   #2
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Re: Technical Info: G80 Locking Rear Differential

Good info! Still alot of folks who think the G80 is strictly limited slip or don't understand how this locker works.
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Old 03-23-2009, 11:29 AM   #3
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Re: Technical Info: G80 Locking Rear Differential

I wonder if there is a way to convert it to an air locker. For when you want it locked on take off like at the track.
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Old 03-23-2009, 01:40 PM   #4
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Re: Technical Info: G80 Locking Rear Differential

Yes G80 FTW, nice and easy explaination of how it works!
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Old 03-23-2009, 01:42 PM   #5
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Re: Technical Info: G80 Locking Rear Differential

Very good info
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Old 03-23-2009, 04:22 PM   #6
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Re: Technical Info: G80 Locking Rear Differential

Good info to know...

I just know that when I light off my tires, both wheels are spinnin, hell yea, the way I like it. No one tire fire on this ride.
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Old 03-24-2009, 01:56 PM   #7
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Re: Technical Info: G80 Locking Rear Differential

OP is updated with video! Enjoy.
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Old 04-19-2010, 04:50 AM   #8
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Re: Technical Info: G80 Locking Rear Differential

Where is the How To Install for the g80!?
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Old 04-27-2010, 05:32 PM   #9
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Re: Technical Info: G80 Locking Rear Differential

yeah I want to install a G80, how do i do this or get it done. im sick of getting one tire spinning in the mud.
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Old 07-23-2010, 01:42 AM   #10
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Re: Technical Info: G80 Locking Rear Differential

Would this be the same diff offered on the trailblazer?
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Old 07-30-2010, 01:13 AM   #11
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Re: Technical Info: G80 Locking Rear Differential

Thanks for the help guys
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Old 02-07-2011, 10:23 PM   #12
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Re: Technical Info: G80 Locking Rear Differential

were did you get a g80


found a tru loc instead detroit locker 912a654 $500 for part
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Old 02-07-2011, 10:27 PM   #13
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Re: Technical Info: G80 Locking Rear Differential

G80 is a factory option.
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Old 02-08-2011, 12:45 AM   #14
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Re: Technical Info: G80 Locking Rear Differential

If you want a real posi buy an Eaton, if you want a locker buy TruTrak or Yukon Grizzly.
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Old 02-08-2011, 12:54 AM   #15
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Re: Technical Info: G80 Locking Rear Differential

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If you want a real posi buy an Eaton, if you want a locker buy TruTrak or Yukon Grizzly.
I wouldnt do either...I would just find one of these trucks in a junk yard and steal its entire axle to swap out. Easier...cheaper...and you may even be able to find a 3.73 instead of the 3.42 you likely have..seem's to me like the best way.
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Old 02-08-2011, 02:24 AM   #16
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Re: Technical Info: G80 Locking Rear Differential

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I wouldnt do either...I would just find one of these trucks in a junk yard and steal its entire axle to swap out. Easier...cheaper...and you may even be able to find a 3.73 instead of the 3.42 you likely have..seem's to me like the best way.
or 410s ftw with a g80
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Old 02-08-2011, 02:33 AM   #17
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Re: Technical Info: G80 Locking Rear Differential

410's on in z71's. And v8's I THINK...? The z71's axle's are wider than a z85's. IF I could find one with 4.10's in it I would have bought it a LONG time ago! LOL
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Old 02-08-2011, 02:55 AM   #18
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Re: Technical Info: G80 Locking Rear Differential

Thanks For the info!
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Old 02-08-2011, 02:59 AM   #19
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Re: Technical Info: G80 Locking Rear Differential

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410's on in z71's. And v8's I THINK...? The z71's axle's are wider than a z85's. IF I could find one with 4.10's in it I would have bought it a LONG time ago! LOL
I must say the G80 with the 4:10s ftw! I have found the Locking rear makes a big diff in the snow!
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Old 02-08-2011, 03:01 AM   #20
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Re: Technical Info: G80 Locking Rear Differential

Huge man...HUGE! LOL Snow is so much more fum with a g80.
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