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Rear axle questions - looking for 58.625" wide
https://www.slantsix.org/forum/viewtopic.php?t=27727		 Page 3 of 4
Author:  DionR [ Sun Mar 16, 2008 12:14 am ]
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Author:  sandy in BC [ Sun Mar 16, 2008 7:20 am ]
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The pinion offset is not a big deal. .....they are all offset to some degree in a vertical plane.

You can always install C clip eliminators later......
Author:  DionR [ Sun Mar 16, 2008 9:29 am ]
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Quote:
You can always install C clip eliminators later......
Thought about that but the ones I looked at were for neither road racing nor disk brakes.

I did see that 9" housing ends could be welded on, which would solve the problem.
Author:  Brucehockensmith [ Mon Mar 17, 2008 2:55 pm ]
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I'm a bit "cornfused" by some of these measurements, most of the publications and or "official" doc's give the measurements as flange to flange and spring mt. ctr. to ctr. thennnn what ever brake drum size, mtg face etc. is figured in, not near so complicated for us "old timers". For some what of a chart go to www.dippy.org and go to the library for Chrysler pass car rear axle dem's... Also NOBODY has mentioned the A 100's large bolt pattern 8 and3/4 @54 and about 3/4 in. flange to flange....Hope this helps.
Author:  NewLancerMan [ Mon Mar 17, 2008 4:06 pm ]
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Dion,

I apologize if this was mentioned before, but I read through the first 2 pages and saw Lou mentioned the 67-up mustang rear, but the granada rear falls in between those. I have 245/45/17s with this rear end, and those wheels have 5.75" of backspacing.

If you're deadset on the 8.8", go for it, just thought I'd mention that other 8" option. I got gear chunks from 2.76-3.80 for it cheap, so I didn't run into a gearing problem.

I can post some pics if you like.

MJ
Author:  DionR [ Mon Mar 17, 2008 4:38 pm ]
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Quote:
I'm a bit "cornfused" by some of these measurements, most of the publications and or "official" doc's give the measurements as flange to flange and spring mt. ctr. to ctr. thennnn what ever brake drum size, mtg face etc. is figured in, not near so complicated for us "old timers". For some what of a chart go to www.dippy.org and go to the library for Chrysler pass car rear axle dem's... Also NOBODY has mentioned the A 100's large bolt pattern 8 and3/4 @54 and about 3/4 in. flange to flange....Hope this helps.
I have looked at the Dippy.org stuff, but I will admit that I haven't been able to find anything showing a list of dimensions. Got a link?

I did find the reference to the fact that an F-Body rear is supposed to be about .7" narrower than a B-Body 8 3/4" rear. But I went to the JY yesterday and measured (2) different rear ends and both showed about 60-60.125" wide without drums. One was an '83 something, and the other was an '80 Volare, both with the 7.25" rearends (but with 10 bolts).

The problem with some of this stuff is that things don't add up. There is one chart floating around that shows a 62-70 B-Body (which had (3) different axle widths) with a rear track 3.6" wider than an A-Body, and the F-Body .7" narrower than that. At the same time, another chart shows the 65-67 B-Body rear at 59.5" wide and the A-Body at 57.125" wide for a difference of 2.375". In theory (assuming that the 59.5 number is accurate) an F-Body axle would be about 58.8" wide (if the .7 difference in track was close) which might have worked, and since I never was able to track down exactly how wide an F-Body axle was, I went and measured a couple. They all turned out to be too wide. So all of that was worthless and the F-Body rear ended up as a wild goose chase.

I have an A-100 8.75 rear in my Plymouth and it was more than 60" wide overall, so your 54 or so numbers seems suspect (different year?). Either way, it wouldn't work for me. I'm not looking for the narrowest rear I can, I'm looking for a 58.5" +/- width axle.
Author:  DionR [ Mon Mar 17, 2008 4:45 pm ]
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NewLancerMan wrote:
Dion,

I apologize if this was mentioned before, but I read through the first 2 pages and saw Lou mentioned the 67-up mustang rear, but the granada rear falls in between those. I have 245/45/17s with this rear end, and those wheels have 5.75" of backspacing.

If you're deadset on the 8.8", go for it, just thought I'd mention that other 8" option. I got gear chunks from 2.76-3.80 for it cheap, so I didn't run into a gearing problem.

I can post some pics if you like.

MJ


I haven't bought a axle yet, and until I do I wont be dead set on anything. Laughing

Pictures would be great. Any idea how much clearance between the springs and the tires?

Sounds like you are running the same wheels and tires I want to run, 245/45/17 with 5.72" of backspacing (+30mm offset).

I looked at the Granada (sounds like that is what Lou has in Project V now) and ran across a number of 58.5" wide. But Joshua said he had one and it only measured 57.5"-57.625" wide. Sounded like it was too narrow to me, and I wasn't sure I could get ratio's for it. Any more info on yours?

Thanks!
Author:  Dart270 [ Mon Mar 17, 2008 8:43 pm ]
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DionR,

Ratios are not a problem. 8" can get 2.79, 3.00, 3.25, 3.40, 3.55, 3.80, 4.10, 4.30, 4.56....

I run about 1/4" - 1/2" to the spring on my cars. Even just below 1/4" has been fine with maybe just a kiss on the spring. Rubbing always on fender/wheelwell or front fender lip. These are low profile radials.

Lou
Author:  NewLancerMan [ Mon Mar 17, 2008 9:46 pm ]
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Quote:
I looked at the Granada (sounds like that is what Lou has in Project V now) and ran across a number of 58.5" wide. But Joshua said he had one and it only measured 57.5"-57.625" wide. Sounded like it was too narrow to me, and I wasn't sure I could get ratio's for it. Any more info on yours?
I think Josh's measure is about right, mine was perhaps a little wider. I was concerned 58.5 would be too wide, and I ended up needing just a touch wider than I got. I put some small spacers on, and like Lou said, you don't need much clearance to the spring. I also put in 3" ARP studs, and now will have the width needed if my disc setup spaces out the wheels just a bit. I think it works out just right. the B body is just a touch too wide, and honestly, I'd rather have a little narrow than a little wide ;)

A note however of caution--I have a 62, and while its supposed to be the same, things always seem a bit whacky with it. I'll see if I can find where I wrote my measurements down.

MJ




Thanks!
Author:  sandy in BC [ Tue Mar 18, 2008 6:03 am ]
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Quote:
sandy in BC wrote:
You can always install C clip eliminators later......


Thought about that but the ones I looked at were for neither road racing nor disk brakes.


Some times I just wake up in the morning with crap in my head......

You dont need C-clip eliminators on axles with disc brakes. If you break an axle the calipers will keep the rotors and axle stubs in place[/quote]
Author:  DionR [ Tue Mar 18, 2008 12:02 pm ]
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Quote:
You dont need C-clip eliminators on axles with disc brakes. If you break an axle the calipers will keep the rotors and axle stubs in place
True enough, kind of forgot about that.

Thanks!
Author:  DionR [ Tue Mar 18, 2008 12:04 pm ]
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Quote:
Ratios are not a problem. 8" can get 2.79, 3.00, 3.25, 3.40, 3.55, 3.80, 4.10, 4.30, 4.56....

Lou
Are those aftermarket ratios? What can you find in the wrecking yards?
Author:  Joshie225 [ Tue Mar 18, 2008 12:34 pm ]
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My Granada axle came with 2.79s which is why it didn't go into the 3-speed Valiant.
Author:  DionR [ Wed Mar 19, 2008 12:37 pm ]
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Quote:
I figured the widest I could get and keep full spline engagement by cutting down the D100 axles I have was 58.25"
Is that with brakes, or from axle flange to axle flange?
Author:  Dart270 [ Wed Mar 19, 2008 1:29 pm ]
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All those are aftermarket ratios. I know 2.79, 3.00, 3.25, 3.40 and 3.55 can be found in factory Ford stuff. Probably higher too.

Lou
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