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85lt1

01-14-2008 03:20 PM

what size ring gear

i have an 85 with a 10 bolt rear end how can i tell if it is a 7.5 inch or 8.5 inch ring gear

1985LT1_C10

01-14-2008 06:49 PM

Re: what size ring gear

8.5" 10 bolt with 28 spline if original ...they didnt put 7.5 in trucks (el camino doesnt count as a truck)

85lt1

01-14-2008 07:31 PM

Re: what size ring gear

thanks thats what i thought but i was not sure

jimfulco

01-18-2008 12:22 PM

Re: what size ring gear

http://www.oldsmobility.com/10bolt-tech.htm shows how to tell 7.5" from 8.5" in case you go searching for used innards or something.

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