Limited slip differential 20 v 21

[Blueinterceptor]

Are they the same?

mechanical or just electronic

 

[Blueinterceptor]

The limited slip on the 21 is product code g86.

anyone know the code for a 20?

 

[cardude2000]

Are they the same?

mechanical or just electronic

My understanding is the there is no real locker. Even on the Z71. It uses the brakes to limit spin instead of a G80


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[Blueinterceptor]

GMC claims its 21 at4 will be its most capable off road truck yet. It’s got the same g86 lsd. I don’t think it’s as capable as the g80

 

[d0wnShifT]

My sticker on the Z71 i just picked up states there's a mechanical LSD inside.

 

[Blueinterceptor]

My sticker on the Z71 i just picked up states there's a mechanical LSD inside.

yes a g86. For the past 20 years it’s been a g80 hd automatic locking diff

 

[cardude2000]

My sticker on the Z71 i just picked up states there's a mechanical LSD inside.

I believe it’s a LSD but not a “true” mechanical locker in that it can’t lock in a 50/50 power split to both wheels. The G86 has been used for years for more street prone vehicles and lite utes like the Saab 9-7x


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[wjburken]

Some manufacturers are even going to open rear diffs and relying strictly on using the brakes to put power to the other side.

 

[DWSmoot]

Time frame starting at 7:00 minutes.

 

[Blueinterceptor]

That video is what prompted this thread.
I’ve been looking into if a g80 can replace it.
I’m wondering if the guy didn’t spin the wheels fast enough. The other rear wheel should have done something but it clearly did not
I went to a dealership and had the parts manager look up the axle for a 21 suburban. G86 was not listed but a g80 positraction was.

same dealer looked up the rear end by vin. It is a G86 limited slip