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Rpo Code Different Than Actual Build?

WaterGuy

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WaterGuy Enthusiast

WaterGuy

Posted
Posted

Even notice that the RPO code plate could be different than the actually built truck?

 

My placard shows rear axle as GT4 and G80.

 

While changing the rear axle juice, I found this sticker on the left tube:

 

Broadcast: UK3

Ratio: 4 111

Plant: CBA

Diff: L/S

Model: 605

17-OCT-2002

6683-2

S/N: 65UK3 M22900391

 

On the rear cover (12 bolts) was stamped:

DANA

52016

26702

Rev-C

080101

 

I found on the ring gear this number: 4 111.

 

Bases on the GM service manual I have a 9-3/4" rear end.

 

Any thoughts ? ? ?

C. Charles Hahn Senior Enthusiast

C. Charles Hahn

Posted
Posted

I'm thinking those are just part numbers for the manufacturer of the part. Maybe try spinning a tire and seeing how many rotations it takes to get one full turn of the ring gear to verify?

Bowler807 Enthusiast

Bowler807

Posted
Posted

How long have you owned your truck?

 

If not since new the PO could have changed the rear end. He may have blown the G80 Eaton locker and replaced it with a limited slip unit that has 4.11 gears.

 

If since new, I have no idea.

WaterGuy Enthusiast

WaterGuy

Posted
  • Author
Posted

Bought it used about 2 years ago.

PO didn't mention about any "major" repairs.

There was no "obvious" work being done "down there".

The axle date code matches since it is a 2003.

Didn't have the time to do a "count the revs" test.

 

Hummmmm

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