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Old 03-11-2004, 11:54 PM
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madtexan madtexan is offline
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How many splines would be on my axles and pinion on my 69 gto 3.23 open rear end? I want to start collecting parts to upgrade my 10 bolt to a 3:55 or 3:73 posi but this is one question I don't know. I'd prefer not to take the differential apart until the change over. Is there a standard that was used?

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Old 03-11-2004, 11:54 PM
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madtexan madtexan is offline
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How many splines would be on my axles and pinion on my 69 gto 3.23 open rear end? I want to start collecting parts to upgrade my 10 bolt to a 3:55 or 3:73 posi but this is one question I don't know. I'd prefer not to take the differential apart until the change over. Is there a standard that was used?

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Old 03-12-2004, 05:09 PM
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JEFF KING JEFF KING is offline
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Stock Rear? should be 28 Spline.

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Old 03-12-2004, 09:19 PM
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madtexan madtexan is offline
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Would that be 28 splines on the axles and pinion? There is a master rebuild kit on ebay for BOP 10 bolts but it says something about 27 splines. Could the axles be 28 and pinion be 27?

This is the item:
http://cgi.ebay.com/ebaymotors/ws/eB...EBWA%3AIT&rd=1

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Old 03-28-2004, 10:39 PM
78taman 78taman is offline
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Don't know if you are interested or not, but I build 8.5 rear ends for that model car. the only thing that needs to be done is shorten the driveshaft 1 inch. I live in Plano if you might be interested.

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Old 03-29-2004, 04:23 AM
lil64gto lil64gto is offline
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Mad Texan,

Yes, 28 spline on axle and 27 spline on pinion.

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