ZR2 10 bolt question - Pirate4x4.Com : 4x4 and Off-Road Forum
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Old 06-28-2005, 09:12 PM   #1 (permalink)
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ZR2 10 bolt question

I have a 99 ZR2 Blazer and am doing a SAS. Because of the ZR2 package I have the 10 bolt with 30 splines. I get conflicting opinions on how much abuse this axle can handle. I need to swap bolt patterns to match the 5 on 5.5 I'm going with in front. My options are (in order of cost) run adapters to 5 on 5.5 (can't redrill not enough room), custom shafts, replace the whole setup with another axle. I am currently only planning to go to 33's or 35's but wheel it pretty hard. I already have a lockright and open carrier waiting for the new gears. Thanks for suggestions.
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Old 06-28-2005, 09:21 PM   #2 (permalink)
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i may be wrong but i think the zr2 has a diffent 10 bolt than a 1/2 ton truck i think if youre gonna wheel it hard you might want to put a different rear axle in there its up to you but maybe you should go full width or put a a stronger axle out back like a dana 44 or something i think it would hold up better or plan on carrying some spare shafts.
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Old 06-28-2005, 09:41 PM   #3 (permalink)
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find a 9" out of an early bronco or widetrack d44 rear out of a jeep. or if its just a trail toy run teh diff patterns and romp the fuck outta ir
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Old 06-28-2005, 09:51 PM   #4 (permalink)
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The d44 will be weaker then the 10 bolt Zr2 axle. (its a pre '99 style full size center section,)
My build thread:
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Old 06-29-2005, 07:32 AM   #5 (permalink)
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like mentioned, the ZR2 axle is as strong or stronger than a D44 rear. it's a 30 spline 8.5" (just like the fullsize)

I wheel mine hard with 37s and it's holding up fine (and it's locked). but with that being said, I'm almost done building a 9" for the rear (to match my HP D44 in the front).

I think you can wheel it hard with tires up to 35s and not worry too much if you are a smart driver, but carry spares just in case (as you always should regardless)

if you truly want to keep the rear, then just get spacers for it. I am currently running a billet spacer that converts from the 5-4.75 to 5-5.5 and it's a 1.5" to even out the width (matchs the front now). no problems at all.

the reason I did the spacers first was because I had a tough time finding a 9" in this area for a good price and I wanted to continue wheelin. now that I found one and am almost done with the build, the 10 bolt will go to a new owner

pic here

and one more
fawk this, let's go wheelin
M&M Offroad triple threat chassis #27

Last edited by 1TFROT; 06-29-2005 at 07:42 AM.
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