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View Full Version : mustang rear axle issue....



AI#97
11-21-2009, 08:37 PM
So, I have been having a lot of side to side slop in my differential and figured it was the clutches wearing out and causing the slop. Well, I took it all apart today and found the kevlar clutches in the Eaton to be perfect, even after 7 years of use! AMAZING really!

Anyway, found the end of the axles where they push against the center pin on the diff had mushroomed and are significantly shorter now causing the slop. I found the right axle was .170" shorter, and the left axle was .154" shorter. Thankfully, I had a good spare axle sitting in the garage to compare to.

So, that .324" was a HUGE amount of slop in the rear end. I'm going to use the one good axle and try to find a couple more takeouts on DFWstangs or craigslist.

Does anyone have any good info whether or not hardened axles, like Moser's 28 spline, also have hardened axle ends...? Thankfully the pin is untouched in the diff so this should be an easy fix.

I did find that the outer wheel bearings were shot, however, to my amazement, the center diff carrier bearings were perfect. I guess that diff girdle is doing it's job!

Anyway, ya'll should check the ends of your axles for the same thing and you might find that extra play causing you problems. I'll try and take some decent pictures later.

marshall_mosty
11-21-2009, 08:44 PM
There is a pretty good thread on corner carvers regarding axles. Anyway, based on all that I decided to go with superior axles.

http://www.corner-carvers.com/forums/showthread.php?t=15301&highlight=superior+axles

mitchntx
11-21-2009, 10:54 PM
Does anyone have any good info whether or not hardened axles, like Moser's 28 spline, also have hardened axle ends...? Thankfully the pin is untouched in the diff so this should be an easy fix.



There were severl 4th gen F-Cars that had issues with Moser axles at some point in time

Here is an example after just a couple weekends.
http://www.geckoranch.com/cars/gekko_racing94TAmoser.html

Alan Blaine suggested and uses Superior brand. Several of us have them and have had no issues after 2 seasons.

AI#97
11-22-2009, 12:41 AM
I've had Moser's in the past when I was into drag racing and they were supposed to be better than stock, however, I destroyed a set in less than 50 passes. The stockers have been pretty damn good over the years, but just harder to find now.

I'll have to look into the superiors...but from memory, they only make 31 spline axles, and my diff is a 28. I'd hate to have to buy a 31 spline diff but I guess I could sell this one to Gunter and upgrade and be ready for that 800hp monster I have been dreaming about.

marshall_mosty
11-22-2009, 09:17 AM
Matt,

http://www.superioraxlegear.com/9904-mustang-rear-axle-28spl-3162-p-14517.html

Part #PA6182
7.5 & 8.8, 99-04 Mustang R & L REAR AXLE, 28SPL 31.62
$117.30 (on their website)
You can buy directly from them.

AI#97
11-22-2009, 09:22 AM
Summit has them for 114. I'm going to call superior on Monday to find out if the ends are hardened or not.

mitchntx
11-22-2009, 09:37 AM
The Superiors are the same diameter all the way to the spline ... at least mine are. The Mosers, like shown above, are machined down considerably.

gt40
11-22-2009, 01:12 PM
http://www.geckoranch.com/cars/gekko_racing94TAmoser.htmlMy (Ford-type) Mosier axles aren't necked down like that. They are several years old, though.

(And they've been perfect in the #42 car)

Hood
11-24-2009, 09:59 AM
Moved to new topic...