8 3/4 axle chart - the good one Sticky please?

[YY1]

Can we get the "good" axle measurement chart as a sticky?

The one that has the correct numbers for the 66/67 axles?

I can never seem to find it when I need it.

 

[moparmarks]

3/4" axle shaft lengths measured from the tip of the splined end
to the outside of the flange:
A BODY
'66-'72= 27 11/16"
B BODY
'65-'67= 28 7/8"
'68-'70= 29 3/16"
'71-'74= 30 5/8"
'71-'73 wagon= 31 21/64"
C BODY
'65-'69= 30"
'70-'71= 30 5/8" (Chrysler & Fury)
'70-'73= 31 21/64" (and '69 wagon)

IMPERIAL (Large Bolt Pattern)
'65-'66= 30 1/8"
'67-'69= 30 5/16"
'70-'71= 29"
'72-'73= 31 7/16"
E BODY
'70-'74= 29 31/32"
A100
'65-'70= 30"
D100
'65-'71= 31 1/8"
'72-'74= 31 21/64

Rear end widths, drum-to-drum:
A BODY
'66-'72= 57 1/8"
B BODY
'62-'63= 58 1/2" (And '64 Max Wedge)
'64 = 60 7/8" (Exc.Max Wedge)
'65-'67= 59 1/2"
'68-'70= 60 1/8"
'71-'74= 63"
'71-'73 wagon= 64 3/8"
C BODY
'65-'69= 61.75"
'70-'71= 63.0" (Chrysler & Fury)
'70-'73= 64 3/8" (and '69 wagon)
IMPERIAL
'65-'66= 61 15/16"
'67-'69= 62 5/16"
'70-'71= 59 3/4"
'72-'73= 64 9/16"
E BODY
'70-'74= 61 5/8"
A100
'65-'70= 61 3/4"
D100
'65-'71= 63 15/16"
'72-'74= 64 3/8"



Spring perch widths (center-to-center)
A BODY
'66-73= 43"
B BODY
'62-'70= 44"
'71-'74= 47.3"
C BODY
'65-'73= 46"
E BODY
'70-'74= 46"


Housing widths, flange to flange
A BODY
'66-'72= 52 5/8"
B BODY
'62-'63= 53 1/4" (And '64 Max Wedge)
'64 = 55 5/8" (Exc. Max Wedge)
'65-'67= 54 1/4"
'68-'70= 54 15/16"
'71-'74= 57 7/8"
'71-'73 wagon= 59 7/16"
C BODY
'65-'69= 56 3/4"
'70-'71= 57 7/8" (Chrysler & Fury)
'70-'74= 59 7/16" (and '69 wagon)
IMPERIAL
'65-'66= 57"
'67-'69= 57 3/8"
'70-'71= 54 3/4"
'72-'73= 59 5/8"
E BODY
'70-'74= 56 31/64"
A100
'65-'70= 56 3/4"
D100
'65-'71= 58 5/16"
'72-'74= 59 7/16"

- - - Updated - - -

Copy and save it as a document in your computer.

 

[gdrill]

Good call on this. This info is out there but it's always hard to find the "correct" numbers.

 

[YY1]

I found that one, and I'm in the process of reformatting it so the columns line up.

Wonder if the "drum to drum" difference is because of the width of the shoes.

 

[moparmarks]

No the drum to drum is in line with the housing widths. Shoe width difference is in the backing plate.
This is from the Moparts archives. They have another one too which is wrong and I wish they would just delete it.

 

[tallhair]

Great idea YY1

 

[YY1]

Here's what I have so far.

I rounded some of the 32nd and 16th numbers to make it easier to use, and discarded some of the obscure parts.

I was trying to figure that drum vs backing plate issue, so drum isn't on there yet.


Flange Perch
A body 52 5/8 43
B body 65-67 54 1/4 44
B body 68-70 55 44
B body 71-74 57 7/8 47 5/16
B body W 71-73 59 7/16
C body 65-69 56 3/4 46
C body 70-71* 57 7/8 46
C body 70-74 59 7/16 46
E body 56 1/2 46
M body 54 5/16 44 1/2
A100 56 3/4
D100 65-71 58 1/4
D100 72-74 59 7/16

- - - Updated - - -

Guess the forum doesn't like tabs and spaces for column alignment.

Maybe I'll make a graphic format jpg

- - - Updated - - -

My immediate concern is that I just scored a complete E body 8 3/4 with springs, chunk, brakes, everything, and it looks like it's a go for an acceptable tolerance bolt on to my 73 Satellite except for sway bar brackets.

- - - Updated - - -

...and a secondary concern is that I've always wondered if an M body axles would fit an A body...and it will.

- - - Updated - - -

M body info is from "Farley's"

 

[Cranky]

Keep in mind that these guides are not set in stone. Axle widths do vary even in the same year cars and body lines. It's usually not very much but there is a tolerance and sometimes the tolerance was pushed. It just depended on what was happening on the assembly line that day. I used to part cars in the 70's and when I started getting calls for rears and started measuring, I found this out. So if you're looking for something and a 1/4" might make a difference in what you're trying to do, keep that in mind. Get actual measurements before buying.

 

[YY1]

Agree.

That's why I rounded the 15/16 and 15/32 measurements.

I find it much easier to mentally visualize that way.

...and thanks to the mods for sticky status.

When I have time, I'll edit the original post to include an easier to read chart.

 

[khryslerkid]

May I add this link. More info on the 8 3/4

http://www.bigblockdart.com/techpages/875axle.shtml

 

[YY1]

Finally reformatted quick reference for better viewing-

 

[YY1]

Should mention that Dakota is 9 1/4.

Just had that for reference. Sorry.

Notice it's wider than D series.

Also, M body would be 8 1/4.

Specs for that one's not super easy to find but is awfully close to A body and is good second choice if you have an A and can't find a 65-67 B body 8 3/4.

 

[moparmarks]

Dakota could also be an 8.25

 

[YY1]

Yep.

 

[biomedtechguy]

I had a 1979 Aspen R/T (F-body) w/E58 option Police 360. The 8 1/4 2.72 rear end didn't help it's performance..I bought a 4 speed 73 340 Dart from a junkyard (yeah, I know) and the 8 3/4 housing and axles-everything as an assembly bolted right in to the F body! Even the pins on the perches lined up with the holes in the leaf springs. I later swapped in a chunk from a Charger when the ring and pinion gear broke. I just had to get a "2-way" U-joint to match up the driveshaft's smaller caps and the chunk's larger ones.
The point is that the 73 A-body 8 3/4 fit the 79 F-body with no modifications.

 

[moparjohnny]

I had a 1979 Aspen R/T (F-body) w/E58 option Police 360. The 8 1/4 2.72 rear end didn't help it's performance..I bought a 4 speed 73 340 Dart from a junkyard (yeah, I know) and the 8 3/4 housing and axles-everything as an assembly bolted right in to the F body! Even the pins on the perches lined up with the holes in the leaf springs. I later swapped in a chunk from a Charger when the ring and pinion gear broke. I just had to get a "2-way" U-joint to match up the driveshaft's smaller caps and the chunk's larger ones.
The point is that the 73 A-body 8 3/4 fit the 79 F-body with no modifications.

great idea.good job with this.

 

[biomedtechguy]

great idea.good job with this.

Thanks. I signed up on the F-bodies forum and my recounting of that story was met with some controversy, but it happened exactly the way I posted. Seems like they think that 73 A bodies had 8.25 rear axles, but I'm pretty sure it was a 73 Dart Sport, and I am certain that it had a 340. Seemed all original to me. I don't recall how I got the aluminum Aspen R/T wheels to fit the bolt pattern which they rightly say is smaller than the F body (which is the same as the B body). The rear end swap was definitely a straight up bolt in, THAT I am sure of.

 

[Glenwood]

Thanks. I signed up on the F-bodies forum and my recounting of that story was met with some controversy, but it happened exactly the way I posted. Seems like they think that 73 A bodies had 8.25 rear axles, but I'm pretty sure it was a 73 Dart Sport, and I am certain that it had a 340. Seemed all original to me. I don't recall how I got the aluminum Aspen R/T wheels to fit the bolt pattern which they rightly say is smaller than the F body (which is the same as the B body). The rear end swap was definitely a straight up bolt in, THAT I am sure of.

I think A bodies went to the larger bolt pattern in 73. I had a couple of 73 dusters and one of them had an 8 3/4 in it. I thought F bodies usually got B body axles as the perch widths are very close.

 

[biomedtechguy]

That bolt pattern factoid would explain why I can't recall anything special that I had to do for my factory aluminum wheels or the B-body Centerlines to fit. The rear axle dropped in, and the pin nibs and holes all lined up with the leaf springs.

 

[Bold & Old]

Can we get the "good" axle measurement chart as a sticky?

The one that has the correct numbers for the 66/67 axles?

I can never seem to find it when I need it.

What is a sticky??? like a wedgy but harder to reach?

I have heard the term before...