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Old 08-21-2002, 09:59 PM
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Post are 78 and 86 8.5 10 bolt gears interchangable

I have 2.41 gears in a 78 buick,wondering if 3.42 gears from a 86 S10 will go in. both 8.5 10 bolt.thanks.
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Old 08-22-2002, 02:15 AM
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the rears are the same if they are both 8.5's. you may have to use the carrier from rear that you use the gear from, I don't know if the 2.41 uses a different one or not.
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Old 08-22-2002, 08:38 AM
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thanks again
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Old 08-24-2002, 10:18 PM
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I've got 3.42s out of an 87 S10 in my 78 monte.Not sure but I think their 7.5 rears.I put te whole diff and gears in.
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Old 09-19-2002, 09:35 AM
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i was told it was an 8.5 but sadly i got under there and measured distance between bolts an its a 7.5 so are the gears from the s-10, thats a plus, it should work.how u go about doing the math to find out what gear ratio u have
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Old 09-20-2002, 02:26 PM
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you're killin me buck!
 
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count the teeth, then divide them
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