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04-15-2005, 03:22 PM
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Got Boost?
Join Date: Jun 2001
Location: Rockford, IL
Posts: 608
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IRS for '96
Does anyone know the differences between '99 through '04 IRS units?
Besides cat-back and brake hoses, any other parts to make the switch? If you happen across one for sale in the northern Illinois / souther Wisconsin area please let me know.
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Tom Gentry Life is too short for boring rides! '06 Schwinn StingRay Spoiler (3 speed conversion) '03 Giant Team ONCE (Campy goodness) '00 Bike E E2 Tandem (too many mods to list) '98 ProFlex Beast (no more elastomers) '06 Kustom Kruiser Roadster (8 speed conversion) '74 PPV (Resto-mod project) '98 E-150 Starcraft Heritage "Black Bart" '89 Mercedes-Benz 560SEL "Gunther" |
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04-15-2005, 04:24 PM
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track deprived
Join Date: Apr 2002
Location: Missouri City (Sienna), Tx
Posts: 5,539
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99 are 28 spline, the rest are 31 spline.
99 halfshafts are weakest 01 halfshafts are ok for the power but still weak 03-04 halfshafts are the strongest production halshafts, work ok for that power level, but, I have seen an 04 Cobra on drag radials and 500 miles on the ticker snap a halfshaft stagging in front of me at the drag strip. Moral of that story, wheel hop is a killer. 99-01 differentials have 3.27 gears (in stock form) 03-04 diff. have 3.55 gears (in stock form) I would definitely put in ALL urethane bushing (IRS, Differential, upper and lower control arms) while you have the IRS out. And, more than likely, you might need to get 14mm bolts for the front IRS mount as alot of IRS cars came with smaller 12mm bolts from the factory by mistake. To get the 14mm bolts, go to the dealer and ask for the front control mount bolts to a 99+ GT. Also, you need to switch the Shocks + springs.
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04-16-2005, 10:12 PM
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Registered User
Join Date: Oct 2004
Location: Gastonia, NC
Posts: 1,960
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1994 Black on Black SVT Coupe 2004 SVT Cobra Competition Orange - SOLD 1979 Ghia Coupe - SOLD 1994 Chevy S-10 - DailyDriver 
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