rear end swap

Discussion in 'Fox 5.0 Mustang Tech' started by bigvino, Oct 26, 2010.

  1. hey everyone here is my dilemma.
    last week i did a massive fishtail around a corner. next day i heard a loud "clunk" coming from the rear of the car. it feels like the rear end is moving every time it clunks.. I took it to get checked out. the Mechanic said " its either the axle or the gears inside are jacked up"

    My question is should i just get the rear end repaired or should i buy a whole new rear end?.... *** cause i think the rear right tire was hit in an accident ***

    what rear ends are compatible with a 90 ford mustang and i wanted to keep my 3.73 gears from my old rear end.

    Thanks everyone!
  2. im doing the same thing, but really there is nothing wrong with my rearend. what im doing is the 5 lug conversion/rear disc brakes. from what im gathering, a 94-95 rear end works well and can be picked up for 160 at the local junkyard where i am from disc to disc... hope this helps.
  3. Get a rear axle from a 94-98 GT. It will bolt right up and it has the rear disks. You will also need the supporting hardware for the disk brakes so it is a more of an upgrade than just the rear end. The 94-98 rear also typically has 3.27 gears. the 99+ rear is going to be close to 3 inches wider than the stock one so you should stay away from those. Just as a figure, to replace the rear gears will cost you about 500 bucks if you are just going to fix what you got.
  4. yea i was looking at the cost difference...should i rebuild the rear end or buy a whole end with disk brakes (which is an upgrade)...and i have to add the cost of a mechanic installing it.. cuz im not going to be messing with that!
  5. yea i did mine by myself and the help of this AWESOME!! website... if you have any questions let me kno
  6. sorry, dont mean to jack someones post like this, but a quick question... what supporting hardware would you be talking about? im in hopes of picking the rear end up this weekend, and i wanna make sure i get everything i need while im there... 3.27's are way better then my stock 2.73's in mine!
  7. which method would be cheaper?
  8. where are you located, i have alot of good resorces here in the area im in. to buy a whole rearend would most likely cost less...
  9. master cylinder, brake booster, porportioning valve and 3-2 conversion for the distrobution block. Idealy at the same time you would get some 94-95 spindles and some 99+ dual piston calipers. To do it right is not as simple as a rear end swap. Brakes aren't something you really wanna skimp out on either...
  10. 89drop-- where you from?? im from Corpus Christi, TX
  11. Do the 87-88 T-Bird Turbo Coupe rear end swap!

    Been there and done that! With success! :nice:

    Auto trans 87-88 Tbird Turbo Coupes come with 3.73 gears and manual Turbo Coupes come with 3.55 gears.
    Both rear ends are 8.8 units with traction lock.
    Cost is $125-$300 for the rear axle. Add another $100-$200 or so to complete the brake upgrade.

    I choose 3.55 since I do more highway driving. Both ratios have 10 5/16" disk brakes with vented rotors as standard equipment.

    It takes 2 guys the first day to get the old rear end out and the new one bolted in place.
    It takes 1 guy another whole day to do the brakes.

    This tech note was written for 87-93 model 5.0 Mustangs, so if you have a 4 cylinder conversion or earlier model, there may be some other changes needed as well.. See 87-93 Mustang 5.0 Brake upgrade pages. Improve your 60-0 times! for more information.

    You will need a several sets of fittings, I recommend that you get them from Matt90GT's website,
    87-93 Mustang 5.0 Brake upgrade pages. Improve your 60-0 times!.
    Read Matt's instructions thoroughly, everything you need to know about the brakes is all there.
    You need to be patient and follow all the internal links, and there are many of them.

    You will need 2 fittings in the rear to adapt your old brake tubing to the TC disk brakes.
    The fittings go between the steel tube and the caliper brake hose.
    You will need another set of fittings to make a 2 port to 3 port adapter. To make life simpler,
    just buy the kits from Matt. You could piece them together, but it's not worth the time unless
    you work at an auto parts store with all the fittings ever made.

    You will need to drill the quad shock mounting holes 2” below the holes drilled for the Turbo Coupe
    mounting points. The bolts are metric, so don’t loose them or the nuts. A 15/32” drill should be
    about the right size unless you have access to metric sized drill bits. Going without quad shocks is
    not an option.

    You will need a proportioning valve, Summit has one for $42 + shipping. Wildwood 260-8419
    You will need a kit (FMS makes the part) to gut the stock proportioning valve, Summit also
    has that, about $18. Ford Racing M-2450-A

    You will need a new master cylinder, see Matt's site and make you choice. I used a 94-95 Mustang
    master cylinder. Note that rebuilt 94-95 Mustang master cylinders do not come with a reservoir.
    That means a trip to the junkyard and some more money spent.

    Your brake pedal may be very hard and almost impossible to lock up the brakes. I had to replace
    the front calipers with 73 mm calipers from a 91 Lincoln Mark 7 to get the braking performance up to par.

    You can use the stock 5.0 booster if it is in good working condition. No need to replace the booster.

    Bleeding the brakes will require 2 people and some coordinated effort. I don’t recommend using your
    wife or girlfriend to pump the pedal – they get offended when you yell at them. I used a homemade
    power brake bleeder constructed from a garden sprayer and some fittings from Home Depot. It cost
    about $25 and was worth every penny. See how hard is it to bleed brakes? - Mustang Forums at StangNet
    for details and pictures.

    See Mustang FMS M2300K Brake Install for help with the emergency brake. The red words
    link to some very useful photos on how to modify the handle. The stock setup tends to lock up and not release properly.
    All in all I have been very pleased with the results.

    The rear calipers have a funny self adjusting mechanism that requires the Ebrake to work correctly. The rear calipers also tend to seize up and not slide on the caliper mounts. You may want to use the old calipers for cores and get rebuilt ones.

    Turbo Coupe parts list:
    Rear axle
    94-95 Mustang Master Cylinder with reservoir
    Brake line Adapter fittings 87-93 Mustang 5.0 Brake upgrade pages. Improve your 60-0 times!
    3 line to 2 line brake fitting kit 87-93 Mustang 5.0 Brake upgrade pages. Improve your 60-0 times!.
    proportioning valve, Wildwood 260-8419 Summit or Jegs
    Kit to gut the stock proportioning valve Ford Racing M-2450-A Summit or Jegs
    Reuse stock brake booster
    73 mm front calipers from a 91 Lincoln Mark 7 (two calipers) local auto parts
    Emergency brake cable parts Summit or Jegs or .late model restoration
    M-2809-A* Parking Brake Cable (need 2)
    M-2810-A* Parking Brake Cable (short cable that attaches to the parking brake handle)
    I recommend that you use reman calipers and use the calipers from the Turbo Coupe axle for cores to return.
    The parking brake mechanism and the caliper slides tend to lockup and freeze

    Identifying a Turbo Coupe rear axle:
    1.) Measure the rotors - a TC disk brake uses 10 5/16" vented rotors.
    2.) Measure the length of the quad shock mount arm and compare it to the mount on your existing stock axle.
    The TC quad shock mount arm is about 8" long if I remember correctly.
    3.) Measure the distance between the axle flanges and compare it to stock. The TC rear axle assembly is
    3/4" wider per side, or 1 1/2" wider for both sides.

    Five lug Turbo Coupe conversion:
    Use the 94-98 axles Mustang axles. Use 1990 Mazda MPV 3.0 V6 front rotors (10", 5 lug x 4.5" pattern, 2 7/16" offset ). While you are at the auto parts store, set a TC rear rotor side by side with the Mazda rotor and they are the same except for the offset.

    The next step fixes the offset problem:
    Use a Maximum MotorSports 1/8 spacer (MMWS6, Maximum Motorsports, the Latemodel Mustang Performance Suspension Leader! ) between the inside of the rotor and the axle flange. The spacers may need to have the OD machined to fit properly. The stock rotor offset is 2 5/16" and the Mazda rotors are 2 7/16" offset. The 1/8" spacer puts the rotor back dead center alignment with the calipers.

    The Mazda rotors are under $30 each, and I have seen them for $20 each. The MM spacers are two for $30 + $9 shipping. So the entire package costs $99. That saves $41, which most of us could find a very good use for.
  12. i highly doubt i will find a T-bird down here....i hardly find any parts for a mustang..therefore the any luck i have finding a 87-88 tbird is slim..
  13. st. louis area...tons of mustangs many in fact that i almost didnt want one, but i couldint hold back! :rlaugh:
  14. thats exactly what im workin on now! parts are super cheep here. i got my PBR dual piston calipers here for 16 bucks!
  15. sn95 rear swap for 90 Mustang GT

    if i Swap out the rear end off a 94-98 Mustang GT and place it into my 90 GT.. would the rims from a 2000 Mustang GT fit over the brake components? thanks!!
  16. Sure does. I am running 2k GT wheels on my cobra setup.