North American Turbocoupe Organization

5 lug rear disc swap .......the easy way!!!
scout Offline
Junior Member
Ok I have been trying to figure out a way to swap to 5 lug rear disc, Without special brackets or a total rearend swap. I have been to the bobbit write up on Lincoln and Cadillac components,great info, but could it be easier.

This is what I did and it lets you keep your stock track width!

1.The TC rear and a SN95 rear are the same width, so use any v6 or v8 axles from a 94-95 Mustang. 96-98 I think are the same also.???

2.Go to your partstore of choice and ask for a set of front rotors from a 1990 Mazda MPV minivan with a v6 engine NON 4WD.

3.Ok the original TC 4 lug rotors have a 2-5/16" offset. The new Mazda rotors are 5 lug with a rotor offset of 2-7/16" offset. Now you can machine 1/8" wheel spacers to put between the axle and the rotor. This moves the new Mazda rotor back into center alignment with the caliper.


Just get some 1/8" washers and put behind the new mazda rotor and you have the same result for a lot less money.This is the easiest way I have found to swap over to 5 lug rear disc and keep the original housing with no special brackets.
88 turbocoupe t3, ranger roller, 4.10gears and lots of fun.

ratrapp Offline
do not put washers behind the rotors.when you tighten down the rotor once or twice it will warp the rotor center.i had a truck in my shop a few months ago(f-350)that someone had been putting the wrong rotors on and had been shimming the rotors with would warp out in a few weeks.i put the right rotors on and no more problems.the wheel spacers would be better if you have a long enough axle flange to support the rotor and spacer.
88 turbo coupe ported e6 kirban afpr forge bpv walbro 255lph stinger3" dp into 2 1/2 duals ultra flows bobs gutted upper with 60mm tb ranger roller cam.t-3 race engineering cam pulley gillis vale k&n cone 3.73s centerforce d/f 140 motorsports speedo and fms rear spoiler 17x9 cobras

darkthunder Offline
Senior Member
Are those Mazda rotors vented or solid? What is their overall diameter? And yes 94-98 SN-95 axles are the same length.

Do you have any pics?

This sounds like a great alternative to retaining the factory rear brake setup and converting to 5-Lug. Nice info.
darkthunder - 85 TC// 302/C4
2009 Subaru WRX//daily driver

BJL Offline
the Mazda rotors are vented as they are for the front of the Mazda.
it soudns easy as long as you can find a spacer that fits inside the rotor and all
Brian J Larkin
88TC 328,000 miles
T3, FMIC ,3in stinger exhaust, PimpXS ECC,gillis,
255 walbro, afpr, 5spd swap,spec clutch, sn95 5 lug, Cobra 13in front brake. Vacuum assist brake conversion. 
89 Cougar XR7 3.8SC Auto
95 Ranger Splash 3.0 auto

scout Offline
Junior Member
Just buy these and the washers aren't an issue.

Yes the Mazda rotors are vented.
This also allows you to keep the stock TC e-brake cables and brake lines.
88 turbocoupe t3, ranger roller, 4.10gears and lots of fun.

motormenace Offline
Senior Member
When are you crazy kids going to learn to use the 91-92 Mark VII rotors and axels? They bolt up.....oh, cause they're the 5 lug version of the 87-88 brakes.
86 turbo coupe (14.12 at 15 psi. sleeper) *gone* you have a V8...isn't that cute...

Pete D Offline
Scout, check your PMs
Pete Dunham


scout Offline
Junior Member
Thanks. Pete I have changed my email to [email protected] This is my priority email.
88 turbocoupe t3, ranger roller, 4.10gears and lots of fun.

84TBirdTurbo42 Offline
Senior Member
what about 7.5 rear ends? or does the 87-88 have 7.5s to?
Chris Perry
1984 Ford Thunderbird Turbo Coupe. Dead, NY rot killed her
1986 Thunderbird shell, swapping parts from the 84.

Joe F Offline
Posting Freak
87's & 88's have 8.8 rears.
JR's Place - My '87 Turbocoupe

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