Thanks for that link. My car is just a street car. No drag strip and no road course or Auto X racing. I think this rear end would work ok for my intended use and I'd upgrade it with some MM bushings and other recommended upgrades. Do you agree?read all the way through
03/04 IRS vs 99/01 IRS - Forums at Modded Mustangs
That price isn't anything special. Not ripping you off, but you aren't stealing it either.
Good food for thought, thanks. I'll keep doing my homework on this.As long as you do what it takes to eliminate wheel hop, which is what destroys the irs, you should be fine.
Just take note that if somehow you land up with sticky tires and more power, the level 5 half shafts are enough to break anyone's budget at $1600.
And make sure you have the wheels ready, not many sets fit right with an irs. Which is why I didn't do it.
Good food for thought, thanks. I'll keep doing my homework on this.As long as you do what it takes to eliminate wheel hop, which is what destroys the irs, you should be fine.
Just take note that if somehow you land up with sticky tires and more power, the level 5 half shafts are enough to break anyone's budget at $1600.
And make sure you have the wheels ready, not many sets fit right with an irs. Which is why I didn't do it.
I've never seen an IRS for sale but always heard they go for about $1500 for the Termi 03/04 versions that are a little more beefed up. I've never seen a 99 for sale nor did I know that 99+ Cobra came equipped with IRS. I'll probably pick it up tomorrow after our weather settles down today.Just for reference the last IRS I saw for sale on CL in Dallas they were asking $1200.
I'm not worried about having a 28 spline axle, that's what the straight axles have and they hold just fine for the HP level that I'll be staying in. The extra brace that's missing, is that something that can be purchased and added to the 99' IRS?The 2003 to 04 IRS has 31 spine axles and a brace near the front. That's why you don't see a lot of people running the 99- 02. I run an IRS in a fox and haven't run into wheel hop problems yet in 7yrs. Guess I'm lucky.[emoji12]
Just FYI to anyone swapping a fox. I had to shorten my aluminum driveshaft for the swap. I found that installed the yoke was all the way in the trans...almost riding the output seal. I had mine shortened and since haven't had any problems with vibrations or wheel hop. Its the 04 model with stick cobra springs and (hate to say it) Monroe blue fox shocks with spacers on the bolts that go through the control arm. The only reason those high priced yellow and buds are needed is because the factory bolts are thicker. I opted for different bolts that fit the factory fox shocks and made plastic sleeves for them. I don't know why the driveshafts work for every other swap I've seen accept 1 other car. Under load the pumpkin moved just enough to move the driveshaft further in the trans ( t5 ) to cause a vibration.
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