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nine inch rearend under a fox body

29K views 19 replies 12 participants last post by  onesillynotch  
#1 ·
Hi everyone, I'm looking to put a 9 inch rearend under my 88 mustang. I'm having trouble finding all the information I need to complete this. Like what brakes do I use, how much to I cut the rearend down too? All the information I could get would be great. Thanks for your time!!!
 
#3 ·
There are suppliers of rearend that are the correct width and have all the brackets on them for a fox. I think that I have even seen them on ebay not sure how good they are but it's a start. Unless you are makin huge power the 8.8 will hold up just fine. For the price of a 9 inch you could build the **** out of a 8.8 and have $ left over. Just my .02
 
#4 ·
that is the thing, in my area find a 8.8 is very hard, i have a 9 inch and would like to use it. It is going in a 460 fox so i would like to over build it just because. I figured i would have to do the same thing to a 8.8 as i will to my 9 inch ( axels, gears, spool, ect...) has anyone done this?
 
#5 ·
How fast are you looking to go?

A 9" housing is $1k min plus a center section $500

plus the Axles, bearings, spool, gear

you can get a 8.8 housing on ebay if you keep looking. all you need is the housing so the rest of the stuff can be junk.

Strange stuff all the way. also recomend 9" housing ends rather than eliminators

Tim
 
#6 ·
i would love to get into the 9's but we will see about that, and i know a 8.8 would hold that, its just that i have the 9 inch and want to use it. You really think it would be 1k plus? I figured i would cut down the 9 inch myself, get axels and all the other stuff i would need, just need to know the length that the axels and the housing need to be.
 
#7 ·
Currie sells the brackets

Problem #1 getting them welded in the right spot

#2 the upper cotrol arm mounts are not in the same location as a 8.8 and that will cause poor suspension geometry.

also if you are going in the 9's you are going to need to brace the housing.

Narrowing the housing is not as easy as it looks you need a jig to hold the ends and alighs them withe centersection.

Tim
 
#8 ·
Moser has the housings for $510.00 and the housing with the axles for $885.00. The housing under my Fairmont is 55 1/2" wide which is a little bit narrower than the stock Fox cars. I made my first set of brackets which wasn't too hard but on the 9" I'm using now I bought them. I used the late 3.15" ends and the Explorer brakes bolt right on.
http://www.moserengineering.com/Pages/Housings/hous-ford9.html
 
#9 ·
I was thinking that the just the housing was $900 or so

That is not bad but the control arms are still not in the right spot.

Tim
 
#15 ·
I once built a 9" for my 1978 Zephyr 351-W...

Welded the "mickey-Mouse ears" that I custom cut from .75" solid steel for mounting the 4-link pickup points to the differential. I had like $2K invested in housing,axles, N-case, posi unit, disk brakes... only to find that the differential would locate it 1" offfset to the right, and wheels wouldnt sit square. Ended up selling it to a local drag racer, and build a HD 8.8 instead.
 
#18 ·
Ok

DTS has a housing that has the mounts lowered down in the housing so that they are the same as the 8.8

The 9" I have looked at from Moser and Chris Alston had the mounts much higher than DTS.

your car works but DR and REN guys don't run 9" because of the poor bar angels compaired to Kevins stuff and TeamZ.

I went a 1.386 yesterday on a 9" slick on a 10.40 pass

Tim
 
#20 ·
dont take this the wrong way but if you are on here asking on info on how to get this going then odds are(im only assuming) that you will not be making any power to ever need a 9"..poeple are going plenty fast with built 8.8s