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Old 01-10-2010, 04:03 PM
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Join Date: Jan 2010
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Default Locking differential

I have an 06 Silverado with a locking differential that is locking up once in a while when I turn. The tires will skid like an ATV with a solid axle. Does anyone know what causes this and more important how to fix it?
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Old 01-10-2010, 04:04 PM
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2007 Chevrolet Silverado 2500
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Location: Charleston SC/Danbury Texas
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Is it aftermarket, or is it stock?
2007 2500HD Silverado 2WD Regular Cab 6.0 6-speed auto, Super 44 Flowmaster, Blackbear Performance Tune.
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Old 01-10-2010, 06:28 PM
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It's stock.
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Old 01-10-2010, 08:38 PM
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2004 Chevrolet Silverado 1500
Join Date: Nov 2009
Location: sacramento,ca
Posts: 1,028

hey sidewinder,
is a 15,25,or 3500? i have a 1500 and i took it to the snow last winter up by tahoe. i was coming back down the mountain and i heard a clicking noise sounding like it was coming from the rear end. i took it to the dealer and the service manager told me i have a detroit locker in it. meaning that it keeps both rear wheels at the same constant speed. so hope this helps. good luck
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Old 01-10-2010, 09:41 PM
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Join Date: Jan 2010
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It's a 1500. The build sheet on it just says G80-locking rear differential.It has 3.42 gear ratio.
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Old 01-11-2010, 04:06 AM
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Posts: 236

That seems to be a normal thing with the G80
Ive noticed in both of mine they seem to lock in around corners quite a bit, especially after getting off the highway.
The one in my 92 did the same thing.
It seems to get less and less with more miles on them.
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Old 05-17-2010, 01:19 PM
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Join Date: May 2010
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Originally Posted by sidewinder View Post
I have an 06 Silverado with a locking differential that is locking up once in a while when I turn. The tires will skid like an ATV with a solid axle. Does anyone know what causes this and more important how to fix it?
I have a 2007 Silverado with the same problem. The "rear locking differential" should automatically engage whenever one of the rear wheels spins considerably faster than the other. When the lock activates, the two rear wheels are locked together like an ATV.

What is wrong here is that as soon as this mechanism detects that the load on the two axles is back to normal, it should automatically disengage, but it does not.

That is the problem. The "rear locking differential" does not disengage when back to normal. This can damage the rear differential or break one of the axles is the truck is sufficiently loaded.

It can also make you lose control of your truck by causing its rear to skid. This can be very dangerous if you are taking a curve at high speed and the pavement is wet (like in the highway). The failure of "rear locking differential" to disengage will cause one of the rear tires to lose its grip on the road loading all the centrifugal force on the other tire.

I still have to take my truck to the dealer to "try" to get this fixed, but I can see their answer already: "Your truck is within factory parameters".

Well, at least I want to set some precedent in case the worse happens.

If you took your truck to the dealer, could you let me know how it went?

Last edited by dyma82; 05-17-2010 at 01:24 PM.
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Old 05-18-2010, 06:02 AM
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Join Date: Jan 2010
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Thanks dyma, it seems to be getting better.I'll let you know if there is any change.
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Old 09-02-2011, 06:35 PM
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Join Date: Aug 2011
Location: Missouri
Posts: 4

I have a 99 suburban with the G80 that I'm working on right now for the same problem. I tore it apart to find a single tooth broke off the gear on the driver's side axle gear. Needing help myself I have just about everything pulled out but the gear itself. I just need to remove the two locking pieces running across the larger opening in the case to get the gear out. Does anyone know what the trick is here? Much appreciated as this is our only vehicle right now.
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Old 09-09-2011, 07:56 AM
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Join Date: Sep 2011
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Sidewinder, I have had the same problem with the non - unlocking rear diff on my 2010 Chevrolet (30K miles). I have taken my truck to the dealer and had EVERY part in the rear end replaced TWICE. Did it again this morning on my way to work, I haven't found a fix as of yet. I am taking it BACK to the dealership this weekend will report as soon as possible.

Last edited by Colter.Pesek; 09-09-2011 at 08:22 AM.
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Old 09-09-2011, 07:56 AM

05, 2500hd, 410, chevrolet, chevy, chevys, colorado, differential, g80, locking, noise, rear, s10, sale, silverado

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