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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2006 Posts: 564 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 564 | I seem to remember someone here saying that if a truck was ordered with Posi, that automatically gave it the Dana 44.
Were '62/'63 trucks available with a 12-bolt posi?
Basically, can anyone tell me when GM started putting 12-bolt Posi rears in a truck?
Or, can someone tell me specifically about the Dana 44/Posi thing.
Thanks,
-Brad
SOUTHERN FALL GABfestOctober 6 ~ Commerce, Georgia Details here!Never Pee on an Electric Fence. | | | | | Joined: Feb 2002 Posts: 167 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2002 Posts: 167 | I've got a Eaton 10 bolt that is in my '62 that IS a posi. The 12 bolts I believe were in the GMC's if I remember correctly.
I think it was 1960 GMC startd (don't quote me on this lol), but you can use up to 1970 ('70 last year for 6 lug truck rearends), but you'll have to relocate the mounts on the rearend so it can bolt up to the trailing arms on your '62.
there is an aftermarket kit for this.
David
My truck don't leak oil, it just marks its teritory.
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | GMC used the Dana 44 differentials from '55 to
about '70. Chevy 1/2 tons with posi used the GMC
diff in '59 only. '60-'62 used an Eaton posi in
the 3rd member rearend. '63 and later have the
modern 12 bolt 8 7/8" rearend. My sources are the
'59, '60 Chevy and Chilton's '61-'71 truck manuals.
Bill Burmeister
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