2004 Locking Differential - Question - Chevy and GMC Duramax Diesel Forum
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Old 12-05-2012, 01:55 PM   eBay Motors  #1 (permalink)
 
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2004 Locking Differential - Question

The build sheet on my 2004, 2500HD Duramax, Allison trans shows the following code:

PDN - HEAVY DUTY POWER PACKAGE DURAMAX DIESEL 6600 V8 ENGINE ALLISON 5 SPD AUTOMATIC TRANS LOCKING DIFFERENTIAL-REAR AXLE

The 4x4 works by pushbutton selecting either normal 2 wheel drive, 4 high or 4 low.

So my question: I am wondering what the 'LOCKING DIFFERENTIAL-REAR AXLE' is. Is this a Limited Slip axle or is it something that I can engage manually from the cab?

The build sheet also shows 3.73 axle.
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Old 12-05-2012, 02:55 PM   eBay Motors  #2 (permalink)
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pretty sure its in the rear end and it a limited slip . theres no E-locker on any GM from the facotry that ive ever seen .
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Old 12-05-2012, 03:00 PM   eBay Motors  #3 (permalink)
 
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I just found that there is also a code on the build sheet that shows 'G80 - LOCKING REAR DIFFERENTIAL LOCKING DIFFERENTIAL-REAR AXLE'.
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Old 12-05-2012, 03:06 PM   eBay Motors  #4 (permalink)
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It is a conventional limited slip, yes.
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