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Locking Differential

Neutron

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Neutron Enthusiast

Neutron

Posted
Posted

I was just curious as to what makes a rear differential a locking rear differential?

 

My '07 Classic RCSB has it. I believe my gearing to be 3.23

srlbotanical Enthusiast

srlbotanical

Posted
Posted

Do a search for "G80" and you will find tons of information here on the locking rear differential.

 

Basically, when one rear wheel spins about 100 rpm faster then the other your wheels lock together via a flyweight and toothed pin. A governor releases the locking mechanism above about 20mph.

 

Steve

  • 1 month later...
Zberry New Member

Zberry

Posted
Posted
Do a search for "G80" and you will find tons of information here on the locking rear differential.

 

Basically, when one rear wheel spins about 100 rpm faster then the other your  wheels lock together via a flyweight and toothed pin. A governor releases the locking mechanism above about 20mph.

 

Steve

 

 

 

Bought a used 2003 Sierra with 2 wheel drive. The codes list G80 but I don't have a button or indicator on the dash. How can I tell?

pm26 Senior Enthusiast

pm26

Posted
Posted
Do a search for "G80" and you will find tons of information here on the locking rear differential.

 

Basically, when one rear wheel spins about 100 rpm faster then the other your  wheels lock together via a flyweight and toothed pin. A governor releases the locking mechanism above about 20mph.

 

Steve

 

 

 

Bought a used 2003 Sierra with 2 wheel drive. The codes list G80 but I don't have a button or indicator on the dash. How can I tell?

 

 

 

 

 

This is an automatic locking differential, as opposed to a manual locker which will have a dash switch, or a lever, as on a farm tractor, for example.

dewfpo Senior Enthusiast

dewfpo

Posted
Posted
I was just curious as to what makes a rear differential a locking rear differential?

 

My '07 Classic RCSB has it.  I believe my gearing to be 3.23

 

 

 

 

 

Most all factory "locker's" are automatic. They engage when needed and disengage when not needed. No need to have a switch or a light. Recently some manufacturer's are putting in "E" lockers which require you to flip a switch and have a dashboard light (Jeep Rubicon, Toyota FJ Cruiser). It also requires the driver to turn it OFF when not needed, otherwise damage can occur. Some aftermarker kits are either electrically actuated or air actuated.

 

Locking differential are just that, there is a mechanism that "locks" the two axle shafts together for a periord of time.

 

These are different then 'limited slip' type differentials or open differentials.

 

DEWFPO

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