9" Axle swap on 1989 Fox Mustang - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
LinkBack Thread Tools
post #1 of 11 (permalink) Old 08-12-2005, 11:14 PM Thread Starter
Registered User
 
Join Date: Apr 2003
Posts: 417
9" Axle swap on 1989 Fox Mustang

Want to replace my worn 8.8 axle with a 9", already have 2 center sections (28 spline) for a 9 inch axle. Seems to make sense to me. I am unsure what to do about the brakes, can I keep the stock brakes by changing the axle ends?
Anybody done this swap?

Do you know of any shops or retailers? Any information at all woudl be great.

Thanks

[ This Message was edited by: 67fastback on 8/16/05 6:10am ]
67fastback is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 08-12-2005, 11:25 PM
Registered User
 
Join Date: Jun 2002
Posts: 1,788
9" Axle swap on 1989 Fox Mustang

why would you want to go to a heavier and less efficient rear end design, as opposed to just rebuilding the one you have? going to 9" will cost more than rebuilding.

64 falcon
66 mustang
82 fairmont
a mans fate is a mans fate
and life is but an illusion
rbohm is offline  
post #3 of 11 (permalink) Old 08-13-2005, 10:59 AM Thread Starter
Registered User
 
Join Date: Apr 2003
Posts: 417
9" Axle swap on 1989 Fox Mustang

I already have a 9 inch rear axle in my '67 mustang

I have the center section in that car: 28 spline detroit locker - 3.89:1

I also have one other complete center section (third member) sitting around, collecting dust.

Everything from the 8.8 needs to be replaced, even the housing is beat up. It was a chp mustang.....

I like the idea of being able to swap center sections between the two cars, also I HATE working on the 8.8, I am going to keep the car for the forseeable future and have a stout engine in mind.

I have already decided upon my course of action, any HELP out there?
67fastback is offline  
 
post #4 of 11 (permalink) Old 08-13-2005, 11:51 PM
Registered User
 
Join Date: Jun 2002
Posts: 1,788
9" Axle swap on 1989 Fox Mustang

ok, first you need to add the proper brackets so you can bolt the 9" housing to your mustang's control arms. then you either need to have the axles you have drilled for the fox body four bolt wheels, or swap to 5 bolt wheels. if you get the right housing ends, you can use the fox body brakes if you choose, but better would be to use the torino ends, and use the motorsport rear disc brakes, or use the large F150 drum brakes.

64 falcon
66 mustang
82 fairmont
a mans fate is a mans fate
and life is but an illusion
rbohm is offline  
post #5 of 11 (permalink) Old 08-14-2005, 04:58 PM Thread Starter
Registered User
 
Join Date: Apr 2003
Posts: 417
9" Axle swap on 1989 Fox Mustang

Sweet...
thanks rbohm,
You have focused in on the problem: "the right housing ends" where can I find such?!

I have found 5 places which stock the 9" housing that has had the FOX suspension mounts jig welded in place, for example currie and strange.

They are glad to add many hundreds of dollars for brakes which dont exactly bolt right up, some issues are parking brake...

Ive got new rear stock brakes and all components already in place on my 8.8

Do you know where I can get axle tubes that will allow me to keep the stock 5.0 brakes? (and bolt in the axles 9 inch-style?)

(I don't need more braking power, and I am happy with my 4-lug wheels!)

!!!!THANKS !!!!
67fastback is offline  
post #6 of 11 (permalink) Old 08-15-2005, 01:18 AM
Registered User
 
Join Date: Jul 2003
Posts: 2,844
9" Axle swap on 1989 Fox Mustang

I thought the 9" and 8.8 and 7.5" rears all had the same housing backing plate end pattern. And only the "big bearing" 9" housing had the larger backing plate pattern issues.

[ This Message was edited by: fogged408w on 8/15/05 1:20pm ]
fogged408w is offline  
post #7 of 11 (permalink) Old 08-15-2005, 11:01 AM Thread Starter
Registered User
 
Join Date: Apr 2003
Posts: 417
9" Axle swap on 1989 Fox Mustang

fogged...

Actually that is incorrect. The 8.8 backing plate ends are not rectangular like the 9 inch housing ends are. There are three nine inch housing ends; small bearing, large bearing and *new* large style. They have varoius sizes, but all differ in layout compared to the 8.8. (which is trapezoidal)

Picture of the Axle housing flanges here: http://www.thatmetalbox.com/9inchfoxswap/

I have just completed the swap (November 2005) but thought that I should update this page with the new information that I have got (through my own real world trial) I have created a web page showing how I got it done. Link is above. Thanks

[ This Message was edited by: 67fastback on 11/12/05 8:12pm ]
67fastback is offline  
post #8 of 11 (permalink) Old 08-15-2005, 01:45 PM
Registered User
 
Join Date: Jun 2002
Posts: 1,788
9" Axle swap on 1989 Fox Mustang

currie enterprises carries the housing ends you need.

64 falcon
66 mustang
82 fairmont
a mans fate is a mans fate
and life is but an illusion
rbohm is offline  
post #9 of 11 (permalink) Old 08-15-2005, 02:38 PM Thread Starter
Registered User
 
Join Date: Apr 2003
Posts: 417
9" Axle swap on 1989 Fox Mustang

The sales guy there said that they do NOT, he said that there is NO way to retain my 8.8 brakes. He also told me that if I brought in axle-tube ends cut off of an 8.8 that they could weld those on (if they had time for me in four months time) and THEN I could retain my stock rear 8.8 drum brakes!!!

Is he full of it?

Do I simply need the 'small bearing' standard 9" axle tube ends?

Geez, I am confused...
67fastback is offline  
post #10 of 11 (permalink) Old 08-16-2005, 07:04 PM
Registered User
 
Join Date: Oct 2004
Posts: 134
9" Axle swap on 1989 Fox Mustang

Why not use 9" brakes, redrill the drums to 4 lug and get a 4 lug axle?
or
Take 8.8 backing plate and try to modify it to fit a 9" housing.

Alot of guys are ging the other way by putting 8.8's into old fords. I'm switching my 8.8 to 5 lug with ranger axles.


65 comet 19yrs in the shop and now on the road.
Made in Canada built for speed
http://video.google.com/videoplay?docid=6498304960014012619&hl=en
badbird is offline  
post #11 of 11 (permalink) Old 08-16-2005, 07:17 PM Thread Starter
Registered User
 
Join Date: Apr 2003
Posts: 417
9" Axle swap on 1989 Fox Mustang

hmmm thanks for the idea, at least it is a solution... yes I plan to stick to 4 lugs (got 4 good wheels + tires) There are a few unknowns though.. how about the parking brake? would it exactly fit into the 9" backing plate and actuate the mechanical linkage properly?

::alas::

If only I could find somebody who has swapped a 9" rear axle into their fox (mustang) ford and retained all braking hardware. I think that if I could find information percisely comparing the 8.8 axle tube end to the 9" (small AND large) I could determine if what I want to do IS Easily done.

hmmm I suppose that I may soon be the author of that info, ...borrow a buddies dial caliper set to measure and my girl's camera to document and get exact dimensions of them all (after I take all of my cars apart! [SH*T!])

gottadoit
67fastback is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome