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How To Identify Type Of Differential


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6 replies to this topic

#1 Silverado_zach

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Posted 10 May 2007 - 09:10 PM

I recently bought a used 2004 2500HD Silverado 4x4, with the 4.10 gears and am trying to find out if I have locking front and/or rear differentials. If any one has any info on how to identify the type please let me in on the secret.

#2 ryank1

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Posted 10 May 2007 - 09:17 PM

Check your rpo codes for g80

#3 Silverado_zach

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Posted 10 May 2007 - 09:29 PM

Check your rpo codes for g80



I'm sorry, I am a complete newb and don't know what the rpo codes are.

#4 ZsTB

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Posted 11 May 2007 - 12:34 AM

RPO codes are on a sticker in the glove box. G80 is the RPO Code for Differential, locking, heavy-duty, rear.

RPO Codes

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#5 Shaners

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Posted 11 May 2007 - 04:29 AM

The front diff is open. If the G80 code is found on the sticker in the glove box, then the rear diff would be a locker. These trucks don't have limited slip anymore. When the rear locks, it really locks...

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#6 Silverado_zach

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Posted 11 May 2007 - 05:51 AM

Thanks for the replies, I will check this today. What exactly does the front differential being "open" mean?

#7 Ranger

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Posted 11 May 2007 - 04:57 PM

Open being the opposite of locking...It has no limited slip or posi-trac.