IRS swap.
hey guys i just bought a 2004 irs to put in my car after i gernaded the rear in my car thursday morning. supposedly its a complete drop out assembly and i know i need to change the exhaust and the yoke on it, but what i was woundering was can i run a 17x10.5 deep dish bullitt wheel with 315/35/17s on it and clear everything in the rear as far and wheel openings, cradel bolts, control arms, and brake lines and those sorts of things ? your help will be greatly appreciated
yes you can run a 10.5 inch wheel with no trouble. watch the clearance of the tire on the IRS bolts. you will see the ones i am talking about as they will be right by the sidewall of the tire. you may need to change them our for ones with a low profile head on them. they are only a few bucks. pretty sure you can get them on maximum motorsports.
i am not 100% on that. I seem to remember the hardware being slightly different and also seem to remember there being 2 sets of holes that are there one for the IRS and one if you are using a solid axle. I did the swap the other way from IRS to solid axle. Maybe someone else can chime in to confirm what i seem to remember or say i am off. I did this swap several years ago.
the 7.5 inch rear was the same rear in the 4 banger mustang. they are very weak . the left carrier bearing exploded and actually split the cage in half and chipped every other ring gear tooth and . with the cage being split it ate up the bearing race so i needed a replacement axel housing too . thursday morning it went bang and felt like the rear was falling out of the car but in all actuallity it had .300+ clearence between the ring and pinion gears
it's traction not power that destroys rear ends
A common debate irs vs. sra but IRS feels/handles better. No matter if it's a weaker design or not. The key is to them lasting is knowing how to adapt your driving to fit the IRS.
A common debate irs vs. sra but IRS feels/handles better. No matter if it's a weaker design or not. The key is to them lasting is knowing how to adapt your driving to fit the IRS.


