What rear does GM put in the 2500HD's? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 05-22-2002, 08:49 AM
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What rear does GM put in the 2500HD\'s?

Just to satisfy my curiosity, what rear axle is GM putting in the 2500HD's? I thought the HD's were getting 14FF's but the differential case on some of the 2500HD's I have seen looks more like a Dana 70 (kinda like a 14FF with more webbing out to the axle tubes). This is just an observation I have made seeing the pumpkin on trucks going down the road - I haven't counted bolts or anything to verify if the diff case has 14 bolts (14FF) or 10 bolts (Dana 70).
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post #2 of (permalink) Old 05-22-2002, 09:11 AM
 
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Re: What rear does GM put in the 2500HD\'s?

They came out with a new one that has an 11.5" ring gear. It's a corporate axle.

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post #3 of (permalink) Old 05-22-2002, 10:25 AM
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Re: What rear does GM put in the 2500HD\'s?

i think they went from the 9.5" semi floater 14 bolt to the 10.5" full floater 14 bolt. the 11.5" i believe is reserved for the dually.
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post #4 of (permalink) Old 05-22-2002, 10:26 AM
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Re: What rear does GM put in the 2500HD\'s?

Trucks equipped with the 6.0l engine get a 10.5" 14 bolt - same basic axle they have been using since '73. 8.1s and Dmax trucks get the new 11.5" "14 bolt" (it does have 14 bolts holding the cover on).
post #5 of (permalink) Old 05-22-2002, 11:50 AM
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Re: What rear does GM put in the 2500HD\'s?

Wow... 11.5"? That means stronger than the 10.54" 14FF (stronger ring at least, if it's proportionally thicker), less ground clearance than a 14FF with the 10.54".
post #6 of (permalink) Old 05-22-2002, 06:31 PM
 
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Re: What rear does GM put in the 2500HD\'s?

On the topic, I have the factory locker in my rear axle. Do you think I should get it out before I do any serious mods like a lift an bigger ties?
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post #7 of (permalink) Old 05-22-2002, 09:15 PM
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Re: What rear does GM put in the 2500HD\'s?

You mean off topic don't you?
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post #8 of (permalink) Old 05-22-2002, 10:05 PM
 
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Re: What rear does GM put in the 2500HD\'s?

I meant while on the topic of the rearend in HDs.
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post #9 of (permalink) Old 05-23-2002, 05:11 AM
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Re: What rear does GM put in the 2500HD\'s?

What does corporate designate? Are there non corporate?
post #10 of (permalink) Old 05-23-2002, 09:35 AM
 
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Re: What rear does GM put in the 2500HD\'s?

<font face="Times New Roman">
<font color=green>Just means that they are GM's axles. Dodge calls their own axles "corporate" also, I beleive that it just means that they are proprietary to the company that put them in their trucks. As in the corporation's axles...
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