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9-1/4" rear question #1712610 12/19/14 12:42 AM 12/19/14 12:42 AM
Joined: Oct 2005 Posts: 8,871 Ontario, Canada S Stanton OP Don't question me!
Stanton OP Don't question me! S Joined: Oct 2005 Posts: 8,871 Ontario, Canada	A few weeks ago this topic came up but a search has yeilded nothing so ... 9-1/4 rears came with two style castings and covers. One is the common octagon and the other is round. What models and years did the round ones come on ?

Re: 9-1/4" rear question [Re: Stanton] #1712611 12/19/14 01:06 AM 12/19/14 01:06 AM
Joined: Oct 2006 Posts: 842 Urbana, MD B bordin34 super stock
bordin34 super stock B Joined: Oct 2006 Posts: 842 Urbana, MD	I believe that was my topic. I do not know the answer to your question. But at least up to a 1978 New Yorker it was round.

Re: 9-1/4" rear question [Re: Stanton] #1712612 12/19/14 01:06 AM 12/19/14 01:06 AM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	All the ones I've seen or had were rounded tops, with the bottom half having stop sign shape sort of. (late 79 to 90 model trucks) I now have one in my 03 durango, and haven't peeked at it yet, the top half of it.

Re: 9-1/4" rear question [Re: buildanother] #1712613 12/19/14 01:06 AM 12/19/14 01:06 AM
Joined: Oct 2006 Posts: 842 Urbana, MD B bordin34 super stock
bordin34 super stock B Joined: Oct 2006 Posts: 842 Urbana, MD	My thread https://board.moparts.org/ubbthreads/show...rue#Post8337753

Re: 9-1/4" rear question [Re: bordin34] #1712614 12/19/14 11:43 AM 12/19/14 11:43 AM
Joined: Oct 2005 Posts: 8,871 Ontario, Canada S Stanton OP Don't question me!
Stanton OP Don't question me! S Joined: Oct 2005 Posts: 8,871 Ontario, Canada	Yes, that's the thread I was looking for. So this still has me baffled. It doesn't appear to be a 9-1/4 as it only has 10 bolts. But it doesn't look like an 8-1/4 either - no plug and the cover is round, not oval. Its definitely a Mopar piece as it has the pentastar cast into it. What is it? 8367015-axle1.JPG (75 downloads)

Re: 9-1/4" rear question [Re: Stanton] #1712615 12/19/14 11:45 AM 12/19/14 11:45 AM
Joined: Oct 2005 Posts: 8,871 Ontario, Canada S Stanton OP Don't question me!
Stanton OP Don't question me! S Joined: Oct 2005 Posts: 8,871 Ontario, Canada	pic 2 8367016-axle3.JPG (75 downloads)

Re: 9-1/4" rear question [Re: Stanton] #1712616 12/19/14 03:03 PM 12/19/14 03:03 PM
Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun nomore65BelvJim I Live Here
nomore65BelvJim I Live Here Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun	Is the plug on the passenger side, a 1/2" square drive pipe plug into the housing? Looks like a 76 F wagon/HD 8-1/4 to me. Finned brake drum and larger locating hole in the perch for the iso clamp set-up.

Re: 9-1/4" rear question [Re: Stanton] #1712617 12/19/14 04:18 PM 12/19/14 04:18 PM
Joined: Jan 2003 Posts: 25,785 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,785 Rio Linda, CA	When in doubt the casting number might help. 7-1/4 2070051 3507881 3723675 8-1/4 2852905 3723598 3723599 8-3/4 1820657 (small stem, up to 1964) 2070741 (small stem, 1965 and later) 1634985 (large stem, up to 1964) 2070742 (large stem, 1957-1968) 2881489 (tapered pinion, 1969-1971) 9-1/4 3507890 3507891 3723199 The INTERNET, the MISinformation superhighway

Re: 9-1/4" rear question [Re: John_Kunkel] #1712618 12/19/14 04:47 PM 12/19/14 04:47 PM
Joined: Jun 2005 Posts: 5,102 Western Md. skicker "The Champ"
skicker "The Champ" Joined: Jun 2005 Posts: 5,102 Western Md.	8 1/4 according to the part #... ...FAFO...

Re: 9-1/4" rear question [Re: skicker] #1712619 12/19/14 06:39 PM 12/19/14 06:39 PM
Joined: Jan 2005 Posts: 188 Lafayette, La. L Leo member
Leo member L Joined: Jan 2005 Posts: 188 Lafayette, La.	My 70 Satellite came with this rear end, 8 1/4 for sure.

Re: 9-1/4" rear question [Re: Stanton] #1712620 12/20/14 11:42 AM 12/20/14 11:42 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	Quote: Yes, that's the thread I was looking for. So this still has me baffled. It doesn't appear to be a 9-1/4 as it only has 10 bolts. But it doesn't look like an 8-1/4 either - no plug and the cover is round, not oval. Its definitely a Mopar piece as it has the pentastar cast into it. What is it? that's a 8 3/8 AKA 8 1/4 10 bolt

Re: 9-1/4" rear question [Re: skicker] #1712621 12/20/14 01:42 PM 12/20/14 01:42 PM
Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun nomore65BelvJim I Live Here
nomore65BelvJim I Live Here Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun	Quote: 8 1/4 according to the part #... Yup. 1976 or earlier due to the fill/level check plug being on the side of the housing. 77 moved the plug to the cover. Looking at the larger locating hole in the spring perches tells me iso-clamp mounting so its 73 or newer. 73-76 F, M, J, or B. Drum and perch widths will tell which. Looks identical to the one in my 76 Aspen wagon. The wagons all got an 8.25 with the HD brake drums.

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