10 Bolt Chevy Rear.....8.2 0r 8.5

John Kelley · 10-18-2012, 03:26 PM

I'm trying ti identify a rear end in a '72 Chevelle.
It has GCC 061 1 stamped on the axle tube, is this a 8.2 or 8.5
The Chevy dealer doesn't have any info on anything this old.
Thanks for any info......JLK

Lyn Smith · 10-18-2012, 04:00 PM

a 8.5 has 2 little cast ears hanging down under the cover in the back.

Freddie Cain · 10-18-2012, 04:16 PM

8.5 has 1.25 pinion nut.

Mike Semeniuk · 10-18-2012, 04:40 PM

Unless it has been changed out - it should be an 8.5. The 8.2 has an oiling detail on the top half of the cover ( like the 12 bolt) , and the 8.5 has a pronounced bulge in the cover to accomodate the crown gear, it also has 2 pointed ears on either side of the diff protruding on the bottom.

John Kelley · 10-18-2012, 07:02 PM

Sadly what I have is a 8.2.....
I found a 12 bolt housing out of a '67 Chevelle REAL CHEAP......a bit narrower but apparently will bolt in !!

Tom keedle · 10-19-2012, 04:57 AM

i've never seen a 8.5 in a 72....seems to me it was the 73 model year for the 1st 8.5 (in a chevelle)

anyway, good deal on the 67 12 bolt find, they're getting scarce BUT is it "legal" for stock?

width issue,ya know...

10-18-2012, 03:26 PM	#1
John Kelley Senior Member Join Date: Feb 2002 Location: Tightwad,TEXAS Posts: 911 Likes: 6 Liked 3 Times in 3 Posts	10 Bolt Chevy Rear.....8.2 0r 8.5 I'm trying ti identify a rear end in a '72 Chevelle. It has GCC 061 1 stamped on the axle tube, is this a 8.2 or 8.5 The Chevy dealer doesn't have any info on anything this old. Thanks for any info......JLK

10-18-2012, 04:00 PM	#2
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,197 Likes: 279 Liked 959 Times in 192 Posts	Re: 10 Bolt Chevy Rear.....8.2 0r 8.5 a 8.5 has 2 little cast ears hanging down under the cover in the back.

10-18-2012, 04:16 PM	#3
Freddie Cain Junior Member Join Date: Feb 2008 Posts: 33 Likes: 1 Liked 2 Times in 2 Posts	Re: 10 Bolt Chevy Rear.....8.2 0r 8.5 8.5 has 1.25 pinion nut.

10-18-2012, 04:40 PM	#4
Mike Semeniuk Junior Member Join Date: Aug 2004 Location: Sherwood Park, Alberta Posts: 99 Likes: 19 Liked 6 Times in 2 Posts	Re: 10 Bolt Chevy Rear.....8.2 0r 8.5 Unless it has been changed out - it should be an 8.5. The 8.2 has an oiling detail on the top half of the cover ( like the 12 bolt) , and the 8.5 has a pronounced bulge in the cover to accomodate the crown gear, it also has 2 pointed ears on either side of the diff protruding on the bottom. __________________ Mike Semeniuk 632 GTMA

10-18-2012, 07:02 PM	#5
John Kelley Senior Member Join Date: Feb 2002 Location: Tightwad,TEXAS Posts: 911 Likes: 6 Liked 3 Times in 3 Posts	Re: 10 Bolt Chevy Rear.....8.2 0r 8.5 Sadly what I have is a 8.2..... I found a 12 bolt housing out of a '67 Chevelle REAL CHEAP......a bit narrower but apparently will bolt in !!

10-19-2012, 04:57 AM	#6
Tom keedle Senior Member Join Date: Dec 2008 Location: Berthoud, Coloraduh Posts: 695 Likes: 13 Liked 8 Times in 7 Posts	Re: 10 Bolt Chevy Rear.....8.2 0r 8.5 i've never seen a 8.5 in a 72....seems to me it was the 73 model year for the 1st 8.5 (in a chevelle) anyway, good deal on the 67 12 bolt find, they're getting scarce BUT is it "legal" for stock? width issue,ya know... __________________ without losers,winning means nothing.