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Old 10-15-2002, 07:02 PM
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Post 7.5 gear change

my 78 buick gears are gone, driveshaft just spins. ive changed a chevy ring gear before but never a pinion.i have some gears from an S-10 I would like to swap out, wondering how much more dificult it would be changing ring n pinion. yeah the swap would be 2.41 to about 3.40-3.73 not sure.any help appreaciated.

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Old 10-15-2002, 07:16 PM
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not the same rearend, not a compatible swap, check your spider gear shaft they had a bad wear and breakage problem.
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Old 10-15-2002, 07:21 PM
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there both 7.5 inch 10 bolt rear ends
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Old 10-16-2002, 03:43 PM
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YES they are both 7.5 rears but gm. did a redesign in 88 that changed the size and number of axle splines and side gears , axles are not interchangable
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Old 10-17-2002, 05:54 PM
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I think it came out of an 86, not sure. any sugestions on how to tell. Thanks
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Old 10-17-2002, 05:57 PM
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the only way to tell is to pull the rear cover compare the two, if they are the same you are in luck.
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Old 10-17-2002, 06:00 PM
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will do, thanks for your help.
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