'03 Cobra IRS Swap in SN95 Project

SRT Handz

I tripped & fell down and cut myself & got blood
Oct 10, 2004
941
23
19
32
La Mirada, CA
www.srtmotorsports.com
Soooo, I woke up on saturday morning at 6am because a dream work me up..... at 6:15AM 2003 Cobra IRS Popped up on Craigslist and SVT. I was up super early, made the call and scored it. According to the guy, he was getting 20 calls and i could hear his call waiting going crazy while on the phone. Had to drive 300 miles round trip to get it, but the price was too good to turn down.

Low milage IRS with shocks and Full Magnaflow Catback.... What a score!!! I will keep this thread updated as I go!!

Will be putting this...



Into this...

 
  • Sponsors(?)


usaf_branham

10 Year Member
Oct 30, 2008
926
134
74
Vegas
nice. personally i wouldnt want irs, i prefer straight axle for my car... but if i were building an autocross stang, i would definitely be extremely envious. good score.
 

sneaky98gt

10 Year Member
Apr 23, 2008
2,387
144
114
NC State University
Very nice project!

If I had plenty of extra money, and was still using my Mustang as my primary DD, I'd do an IRS swap. Other than in 100% straight line drag racing, the IRS is superior in every way, especially in ride quality. Plus the look of the exhaust coming out of the back.....:drool:
 

txredgt

Well-Known Member
Oct 26, 2009
1,343
33
59
Very fun project I just got done doing it myself. Any full tilt pieces going to see their way into the build?
 

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
94
134
Before you buy any more parts you should make that IRS :leghump:ing works and does not have any hidden problems.

Let's see a closeup of the diff cover.
 

SRT Handz

I tripped & fell down and cut myself & got blood
Oct 10, 2004
941
23
19
32
La Mirada, CA
www.srtmotorsports.com
Before you buy any more parts you should make that IRS ****ing works and does not have any hidden problems.

Let's see a closeup of the diff cover.
It looks problem free. It has very low milage. The only issue was a ripped CV Boot on one of the axels. The axel was fine, I had the CV boot replaced with a boot from DSS. Fits perfect.

I popped open the cover and serviced the diff this weekend. Backlash is perfect, and the inside looks very clean. I re-sealed the diff cover and am gonna fill it with OEM fluid.
 

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
94
134
I keep second guessing this swap
Rightly so, its just a big waste of time and money. You will be hard pressed to feel any difference and most likely you will discover it has a messed up half shaft or gears. I cannot even believe you said it looks problem free. That is a bit ridiculous.
 

txredgt

Well-Known Member
Oct 26, 2009
1,343
33
59
Rightly so, its just a big waste of time and money. You will be hard pressed to feel any difference and most likely you will discover it has a messed up half shaft or gears. I cannot even believe you said it looks problem free. That is a bit ridiculous.
Going through a corner I can accelerate and previously with the worn out SRA I could not. I had nothing but hopping going across the road during any corner and I no longer have that with the IRS. Sounds like you purchased it outright so why not throw it in the car and see what you think? The brake lines will be the only thing you will need to be careful that you can return them back to the SRA.
 

brtnstrns

Member
Dec 19, 2003
606
11
19
Lewisville, TX
www.cardomain.com
I keep second guessing this swap
Don't sweat it dude. I got an entire IRS, disassembled it, replaced all the bushings, re-assembled it, and installed it in my Mach in my apartment garage without EVER having help from a single other person. Luckily I borrowed my co-workers motorcycle lift, otherwise it would have been impossible to move that bitch around. It's definitely a taxing and daunting task, but it will for sure be worth it. From your previous posts, I don't take you to be a drag racer, so the IRS will be perfect for you.
 

txredgt

Well-Known Member
Oct 26, 2009
1,343
33
59
Don't sweat it dude. I got an entire IRS, disassembled it, replaced all the bushings, re-assembled it, and installed it in my Mach in my apartment garage without EVER having help from a single other person. Luckily I borrowed my co-workers motorcycle lift, otherwise it would have been impossible to move that **** around. It's definitely a taxing and daunting task, but it will for sure be worth it. From your previous posts, I don't take you to be a drag racer, so the IRS will be perfect for you.
Trans jack worked great for me. I did not do the bushings myself but I think I could have done it albeit taking me longer to finish the project. Seeing the polished IRS under your car would make it that much sweeter and it will change the car in looks and performance department.
 
Thread starter Similar threads Forum Replies Date
C Advice for cobra IRS swap? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 17
MTV593 Cobra IRS swap for 93 notch 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 26
Davedacarpainter Dave's ‘03-‘04 Cobra IRS Swap 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 40
W Need Help With My Fox Body Irs Swap ! Fox 5.0 Mustang Tech 17
JQHNDi 2003 Cobra Irs Swap Into 2001 Gt? 1996 - 2004 SN95 Mustang -General/Talk- 4
P Suspension Irs Swap From 03 Cobra 1994 - 1995 Specific Tech 7
393windsor cobra IRS in fox swap Fox 5.0 Mustang Tech 63
I Cobra IRS swap questions SVT Tech Forum 0
F '01 Cobra IRS swap with '99 GT solid rear..? SN95 4.6L Mustang Tech 10
D 03/04 irs swap into an 01 cobra SVT Tech Forum 3
BlackenedSVT IRS to Live Axel swap (99 Cobra) SVT Tech Forum 7
cschauerj Cobra IRS swap. 1994 - 1995 Specific Tech 2
postban 2003 Cobra IRS to 8.8 Live Axle Swap (DETAILS & PICS) SVT Tech Forum 2
W NEW SOLID AXLE SWAP for IRS COBRAS SVT Tech Forum 0
5111 03 Cobra IRS swap and weak points SN95 4.6L Mustang Tech 8
C Expired 99-01 Cobra IRS Suspension Parts 0
J Suspension INSTALLING COBRA IRS INTO 1965 COUPE Classic Mustang Specific Tech 1
C Drivetrain Super 8.8 ring and pinion 2015+ Specific Tech 4
S For Sale 2003 Cobra Redfire Convertible SN95 Mustangs For Sale (1994-04) 0
Hoytster Install 1999-2004 Cobra IRS Hardtail Mount Fabrication Resource Discussion Forum 1
Calcul0n Driveline resistance with 2001 Cobra IRS 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
Hoytster Expired Mustang Cobra Irs Other Classifieds 2
T SOLD 1994 Mustang Cobra, Irs, New Drivetrain Fs/trade SN95 Mustangs For Sale (1994-04) 3
Heberto Garcia Expired Tokico D-specs (dsp-3) Suspension Parts 0
SVTVNM 99 Cobra Rear Irs Stabilizer Bar Mounting Bracket SVT Tech Forum 0
S Expired 94 Mustang Cobra With 04 Cobra Irs SN95 Mustangs For Sale (1994-04) 2
Bruntic Drivetrain Help Choosing An Irs SN95 4.6L Mustang Tech 4
69shocktower Cobra Irs Bushings? SN95 4.6L Mustang Tech 1
69shocktower Fox 2004 Cobra Terminator Rear Irs Upgrade Fox 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 5
crazy98gt What Is My '86 T-top Hatchback Rolling Chassis W/ Cobra Irs Worth? Fox Body Mustangs For Sale (1979-93) 2
W 03 Cobra Irs Problem. SVT Tech Forum 2
FoxMustangLvr Progress Thread My 90 Lx Hatch - Cobra Irs_ Kenne Bell Twin Screw'd 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1848
RdRunnr Expired 03 Cobra IRS & Catback For Sale Drivetrain Parts 3
F Expired 2004 Cobra IRS New Take Out Suspension Parts 0
speedfreek95GT Expired 03/04 Cobra Stock Irs Cover Drivetrain Parts 0
J 1994 Gt - Trick Flow, Irs, 03 Cobra Brakes, .... $6500 Southeast (south Florida) SN95 Mustangs For Sale (1994-04) 0
woody258 Expired 2003-04 Cobra IRS axles complete Drivetrain Parts 2
D Cobra IRS and Engine differences SN95 4.6L Mustang Tech 2
mustang50v8 Rear Wheel Bearings for IRS cobra SVT Tech Forum 1
J Factory Ford Mustang Cobra IRS Cross-Brace 2001 Suspension Parts 2
P IRS from the cobra's what all needs done??? Fox 5.0 Mustang Tech 1
T Cobra IRS with 4.10 gears Suspension Parts 3
jtm604 03 Cobra IRS ?? SVT Tech Forum 10
SNAKEBIT7 My 99 cobra hops VIOLENTLY even with IRS braces and bushings SVT Tech Forum 16
5.0Torx Is the IRS from a mark 8 the same as that from a cobra? Fox 5.0 Mustang Tech 4
BlackGT89 Differences Between '01 and '03 Cobra IRS 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 22
J 04 Cobra IRS knuckles for sale Drivetrain Parts 0
BlackGT89 Cobra IRS in a Fox Mustang - Anyone here do it ? Fox 5.0 Mustang Tech 7
S Cobra IRS Fox 5.0 Mustang Tech 7
At1Maverick69 Cobra IRS into an early Fox Mustang Fox 5.0 Mustang Tech 1
Similar threads