Looking to swap into a solid axle set-up. I also have Steeda Stainless steel cat-back exhaust. For full disclosure, the clutch in my IRS may need to be rebuilt or replaced. If you're interested in working a swap, we can deal with that as well. The car has ~65k miles on it, and was pretty much stock until about 5k miles ago. Since upgrading the car, I have not pounded on it. Let me know if you're interested!

 

What gear in is the differential? I have a 96 Cobra solid rear. 3.73 FMS gear, stock differential. New Yukon 28 spline axles with less then 10k miles on them. was done because the stock drivers side axle started pitting where the bearing was and was creating a humming noise. New bearings and seals were also done.

All work was performed by me. Filled with Lucas oil and friction modifier.

Aside from the rear,. will need the cat back exhaust for the IRS also. I do not want to buy another cat back. My cat back is in near new condition with stainless tips.

Yes there is a difference in width between the 96 - 98 and the 99 - 04. But nothing that will effect ride or handling. I run 17x10.5 wheels out back with the quad shocks on and no clearance issues what so ever. If thats a problem then search for someone with a 99 - 04 GT/Mach1.

Hurst

 

What's the difference in width? I don't want to go narrower. Cat back exhaust would be included in the trade. As far as I know, I still have the stock gears, which I believe are 3.27s (I'm the 3rd owner of the car, I'm confident that the guy I bought if off of didn't do gears, but I'm not sure about the original owner).

Any '99 - '04 owners out there looking to swap? GT's or Mach's only please!

 

Are you still looking for a 99-04 GT rear axle assembly?

Mark

 

Stock 99+ Cobra gear (IIRC) should be 3.55

Yes the 96-98 axle is 3/4 inch narrower on each side.

This does not effect the interchangability. They both bolt to each other.

If you run 17x8 or 17x9 wheels then you'll notice a slight gap between the fender and edge of tire. 17x10.5 fit nicely. I run 17x10.5 on mine.

For perfect width your better off with a 99+ GT or Mach1 axle housing. How ever,.. with 96 - 98 rear you could get away with smaller wheel offset that you couldnt do with 99+ solid rear. For example,.. a 17x12 wheel will fit with the quad shocks removed. You can not do this with 99+ axle.

Hurst

 

I actually started chewing on building a high performance IRS, but what have you got? Stock rear end? What gears and cat back?

 

What gear do you have in the solid axle you have? I'm running 18x10s, do you have a feel for that offset? Also, you seem very knowledgeable (I've caught some of you other posts), do you have shop? Or are you a shadetree?

 

pm sent

 

As previously stated. Its a 3.73 gear from Ford motorsports catolog. New carrier bearings, pinion bearing, crush sleeve, outer seals, new Yukon 28 spline axles and new axle bearings. Lukas oil and friction modifier added. The upper and lower control arms are stock. I do how ever have a brand new set of Mac upper and lower arms with poly bushings still in the box that I was planning on using in another car that I may include depending on how the deal is made. This is NOT a built rear. It is a stock rear with some upgraded parts.

I'm a shade tree mechanic. My father inlaw is a retired mechanic and when he retired here to Fla he built a 1700 sq ft garage behind his house. It has a 10k lb lift, over $20k in hand and power tools as well presses, welders, hoists,.. you name it. I have full access to this shop. I dont like working on other peoples rides because of a few bad experiences I've had trying to help someone in the past. Replaced a clutch,.. all labor for free. 1 month later they blew 2nd gear in the tranny and blamed me for the damage caused by their abuse. I dont know enough about newer cars to become a full time mechanic. Particularly the electronic side of things. I've owned several Mustangs. a new 89,.. my 96 GT I've had since 99 and a 96 Cobra. The GT has seen head swaps,.. 2 k-members, 3 different gears, a full assortment of bolt ons, various exhaust configurations, 2 motors,.. 2v and a 4v motor. The only thing I havent done is the IRS swap. Been looking for a guy like you who wants to do the swap.


Some guys dont like the 94 - 98 housing on a 99+ car. I personally believe its because they dont run more then a 9" wide wheel.

See if you can find someone that runs a SN95 axle on a new edge Mustang and get some opinions from them. I've heard both,.. positive and negative. Negative from a guy running 18x9 Saleen wheels all the way around. And positive from a guy running 17x12 rims with a 325 tire out back. I dont want to do the swap with you and you later on not be happy with the results. If superdutymark has a 99+ rear,.. consider his before mine. A 99+ solid axle will be the proper width for your car.

I want the rear to put in a 96 GT I have. I always thought it would be cool to run an IRS in a SN95 car. Dont know how my 10.5 wheels will fit,.. may have to do some fender modifications keep them,.. or else go back to a 17x9 wheel.

Hurst