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Old 10-29-2008, 07:25 PM   #1
gmclowsierra
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posi help

looking for a posi for my truck. 85 gmc 8.5 10 bolt 28 spline axles. did our trucks come with a posi or what other vehicles had the 8.5 with 28 splines? thanks for the help
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Old 10-29-2008, 07:41 PM   #2
crawdadfox
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Re: posi help

Check out an Auburn or Eaton limited slip, they are a much better / stronger unit than the factory Gov-Loc style.
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Old 11-09-2008, 09:02 PM   #3
gmclowsierra
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Re: posi help

does anyone know if the four wheel drive trucks were 8.5 28 spline axles?
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Old 11-11-2008, 03:31 PM   #4
sdavid
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Re: posi help

Yes 4wd is the same, but has 6 lug axles. The 8.5 is a 10 bolt. Older trucks will have 12 bolt rear axles either 5 lug or 6 lug. You need to make sure you are getting the correct match to what you have.
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