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Thread: 04 cobra susp swap into SN95 chassis

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  1. #1
    Kickin it Old School somethingclever's Avatar
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    04 cobra susp swap into SN95 chassis

    TTK53 and I decided to swap rear axles since this is my DD and his car is more drag oriented and he likes the peace of mind knowing he won’t be breaking any half-shafts. I like the huge improvement in ride quality and tracking over road imperfections.

    This swap is pretty well documented on the interwebz so I’ll keep it short.

    For this swap into an SN95 chassis and doing it on the cheap:

    1.) Swap pinion flanges (use a new nut or your old one with red loctite and peen it to the pinion shaft)
    2.) You have to drop the fuel tank to drill the holes described in step 3
    3.) You have to drill 4 new holes into the bottom of the rear frame rail for the rear IRS mtg bracket
    4.) You have to cut a couple holes in the trunk to access the new bolts in the frame rail (Do not run the bolts into the trunk…the sheetmetal is very thin)
    5.) You have to move/modify the existing brake hose mtg brackets to clear the upper arm
    5.) Buy/install 2 rear exhaust hangers for 99+ GT/Cobra to support exhaust tips
    7.) Swap ABS sensor wires
    8.) Take all the slack out of the e-brake cables so they are long enough



    I won’t bother with any details on the front as it’s a nut and bolt job…

    Car now has:
    Front and rear cobra brakes
    04 cobra IRS
    Front cobra a-arms
    Cut 600lb/in cobra springs with bilstein dampers
    Solid steering rack bushings
    03 cobra OEM catback but it’s too quiet…will need to change
    Rolling stock is 245/45/17 Hankook Evo Ventus 12


    Two more things to do:

    Steeda Subframe connectors
    Steeda bumpsteer tie rod ends to correct the horrendous bumpsteer lowered mustangs get

    Everyone likes pics:












    In hindsight the only thing I would do different next time is purchase IRS specific brakes lines, and modify the factory hard lines with a new 3-way manifold and brake line.
    Last edited by somethingclever; 03-19-2012 at 02:09 PM.
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

  2. #2
    Kickin it Old School somethingclever's Avatar
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    Also, the front IRS bolts are 12mm and rather sloppy in the IRS.....a 9/16" bolt will fit so I drilled out the front mounting holes to 9/16th and bought a couple bolts.
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

  3. #3
    Just spank it!!! Viper_ed's Avatar
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    Amazing how simple it is Hugh?

  4. #4
    Kickin it Old School somethingclever's Avatar
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    Quote Originally Posted by Viper_ed View Post
    Amazing how simple it is Hugh?

    The beauty of mustangs.



    It's a straight forward swap but takes some time to do even with the air tools zingin....however the ride difference makes it worth every minute IMO.

    BTW as you can see I picked up some wheels and will be getting an exhaust this week...thanks for the offers on both though.
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

  5. #5
    Tripedalist yeahloh95's Avatar
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    cool swap i'm doing the same thing on my svo right now, except i'm replacing all the rubber with poly before i put it in .
    Troy
    95 gt 11.3 @ 126
    68 f100 SB soon to be coyote powered
    12 GT 6m cobra jet powered 11.4 @124
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  6. #6
    Kickin it Old School somethingclever's Avatar
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    I would've loved to do a FTB kit but the truth is this car is 99% street and 1% track...plus it gets driven year-round so i couldn't justify the FTB price tag.

    Urethane mounting bushings from MM for $50 may have been worth it though...
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

  7. #7
    Kickin it Old School somethingclever's Avatar
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    BTW the rear calipers are the same whether GT or Cobra...only the mtg bracket is different.
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

  8. #8
    Tripedalist yeahloh95's Avatar
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    thats why i did the poly it will have to help and was alot less money , great info you have put up too thanks
    Troy
    95 gt 11.3 @ 126
    68 f100 SB soon to be coyote powered
    12 GT 6m cobra jet powered 11.4 @124
    90 lx supercharged 440 rwhp on 8 lbs
    17 f150 crew cab coyote powered

    PEOPLE HAVE MORE FUN THAN ANYONE

  9. #9
    Hi! I'M DAKS #1 BITCH! TooFast98Cobra's Avatar
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    finally something cool on this site. Great job!

  10. #10
    Stocker Chevrolet Subaru mr4teth's Avatar
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    Quote Originally Posted by TooFast98Cobra View Post
    finally something cool on this site. Great job!
    X2 ... nice job John!
    2007 GT500 with a few go fast parts
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  11. #11
    No Traction due to Paxton PaxtonShelby's Avatar
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    Car looks really nice John. Love those wheels!

    How about some more info on the car? You've got the handling and stopping part taken care of...what's up with the motor?
    2014 GT Premium - Sterling Gray Metallic - MT82 - Track Pack - Glass Roof - Recaro seats - Spoiler delete
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  12. #12
    Nothing clever to say.... jaa55's Avatar
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    Cool swap.....I would have liked to do one when I had a fox/sn95 car
    03 Torch Red Anni. Ed. Cobra

    11 Grabber Blue 5.0, 3D500 spoiler, CS valance, GT premium, interior upgrade package, Brembos, MT-82 and Whipple powered SOLD

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  13. #13
    Kickin it Old School somethingclever's Avatar
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    Thanks guys...


    The engine is PI swapped with the typical bolt-ons...(JLT, TB, Plenum, pullies, exh) It makes about the same hp as a stock n/a 4v car.


    More importantly this winter it was getting 19-20mpg avg. I'm hoping for 22mpg avg and 28mpg highway on summer blend. :)
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

  14. #14
    Actually a 97
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    I love the looks of the IRS exhaust. Cool swap and crazy how simple it is.
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  15. #15
    Senior Member stevec5ws6's Avatar
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    Sweet swap thanks for sharing!

  16. #16
    No Traction due to Paxton PaxtonShelby's Avatar
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    John - you need to change your screen name to...

    CAPTAIN MPG!!!!!!!!!
    2014 GT Premium - Sterling Gray Metallic - MT82 - Track Pack - Glass Roof - Recaro seats - Spoiler delete
    12.76 @ 114.04 bone stock. Koni yellow coil-overs, BMR watts, LCA and LCA relo brackets, Borla S-type axle back.

    1966 Coupe - 331 stroker - Bullet custom roller cam - cam and motor installed and dyno tuned by Rodeheavers Hot Rod - Astro A5 - McLeod RXT - 486 to the wheels - more fun than my little tires can handle

    1966 Oldsmobile Toronado - currently NOT on jackstands

  17. #17
    More RPM !!! Martin0660's Avatar
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    Looking good John. What is the weight difference of the IRS over SRA?
    Bob Myers ©

    84 Capri RS Turbo -Best 1/8th - 6.24@109, Best 1/4 - 9.82@136...Still only a 4 banger

  18. #18
    Kickin it Old School somethingclever's Avatar
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    Quote Originally Posted by Martin0660 View Post
    Looking good John. What is the weight difference of the IRS over SRA?

    The most technical I can get is:

    IRS - 2 grunts when loading into the truck
    Solid - 1 grunt when loading into the truck


    I'm going to drive across my buddies scales soon....but didn't do a "before" so I won't know the exact difference.
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

  19. #19
    Senior Member ttk53's Avatar
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    How did I miss this and your write up makes this sound like you did it in 4 hours .


    But maybe I missed it because my leg hurts still after being hit with a 4lb sledge.

  20. #20
    Kickin it Old School somethingclever's Avatar
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    Quote Originally Posted by ttk53 View Post
    How did I miss this and your write up makes this sound like you did it in 4 hours .


    But maybe I missed it because my leg hurts still after being hit with a 4lb sledge.

    Anyone that can do this in 4 hrs is definately my hero...
    -JOHN

    Carburetors and SAE wrenches.................


    Buy Made in the USA - It Matters.

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