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#1
05-08-2026, 06:13 AM
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69 Catalina rear end info
I found a 69 Catalina wagon in a salvage yard that has a Posi. It is a 10 bolt BOP, my question is wat size is the center section. Is its bolt in for the A-body? Or is it a larger ring gear. I tried to search it and could not find the answer. I know the rear end is wider. I just want the Posi unit. Thanks
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#2
05-08-2026, 07:45 AM
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If it is the stock rear end it will be a Pontiac 8 7/8" axle, unfortunately it will not bolt into an A-body, and the ring gear is larger, the same size as a Chevy 12 bolt, but a different gear. I wish you were closer as I would be interested in the carrier if it is a 3 series that would work with a 3.23 gear set.
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#3
05-08-2026, 09:59 AM
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Rear
Thanks I believe it’s a 8.2. Here is a picture of the diff cover. I’m still going to pull it. It’s in Colorado. Just can’t leave it to be crushed.
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#4
05-08-2026, 11:32 AM
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someone else may know by site how to identify that rear. The big cars from 65 - 70 were 12-bolts with a ten bolts holding on the diff cover. If you actually have a Posi, some big car guy will want it.
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#5
05-08-2026, 02:29 PM
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Here is a factory 4.11 Safe-T-Track rear end from a '68 428HO Catalina. The cover looks correct.
Dennis |
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#6
05-08-2026, 06:41 PM
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'65-70"P" series rear s only fit appropriate year Pontiac B series.
IF a factory Safe-T-Track in 2.93-3.08-3.23-3.42... ratio, worth popping the cover & cking out the internals. Bought several many years ago, when I could find them as halfway affordable core rears.
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Buzzards gotta eat... same as worms. |
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#7
05-08-2026, 09:57 PM
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Rear
Well I laid in the dirt and fought a stuck drum only to open the cover to find the gears to be welded solid. So lesson learned. Open cover first. But still had a good day at the salvage yard and not at a real job. Tomorrow is the Coys swap meet in Denver and the weather is supposed be perfect.
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