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Thread: 8.8" swap SN95 vs Lincoln Mark 7

  1. #11
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    The wheels I have are 17" 98 GT rims front and rear. I just did not want to use spacers but going through the all the work to do a Lincoln diff and only use stock Lincoln parts may be a going backwards thing even though the rears rotors are vented 10.5". I have SN95 front 95 spindle/hub and 99 calipers and rear axles/calipers/rotors from a 99 also. Maybe I just need to upgrade to 31 spline SN95 axles and use a 1" spacer?
    1988 Thunderbird Sport. No engine, no trans, turbocoupe disk diff with 3:27 gears, 31 spline axles and Cobra clutch packs, Turbocoupe front brakes.

    Bought this car back as an old project car.


  2. #12
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    Quote Originally Posted by Aerocoupe View Post
    Good read, not sure it answers the question but some good info.

    https://forums.corral.net/forums/gen...g-tech/1089223

    I can vouch for Chris Neighbors. This guy is a millwright and one hell of a machinist/fabricator. He rebuilt my T-5 back in 2007ish when I lived in SE Texas and I have abused the hell out of that trans.
    Link no good. Says page not found
    1988 Thunderbird Sport. No engine, no trans, turbocoupe disk diff with 3:27 gears, 31 spline axles and Cobra clutch packs, Turbocoupe front brakes.

    Bought this car back as an old project car.


  3. #13
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    Quote Originally Posted by 86caprirs View Post
    The wheels I have are 17" 98 GT rims front and rear. I just did not want to use spacers but going through the all the work to do a Lincoln diff and only use stock Lincoln parts may be a going backwards thing even though the rears rotors are vented 10.5". I have SN95 front 95 spindle/hub and 99 calipers and rear axles/calipers/rotors from a 99 also. Maybe I just need to upgrade to 31 spline SN95 axles and use a 1" spacer?
    I've got 17" x 8" 95 Cobra wheels(Same dimensions as your GT wheels) on my '83 with 245/45F - 255/45R tires. 94-98 axles, etc. 1" more track per side would probably require me to roll/trim sheetmetal.

    Long live the 4-eyes! - '83 Tbird Turbo

  4. #14
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    Link fixed.

    You can run these spacers with no issues:

    https://www.maximummotorsports.com/W...5-mm-P872.aspx

    All I can say is that the Mark VII rear brakes are specific and there is not much aftermarket support. The 94-04 Mustang rear brakes have a ton of aftermarket support. I am pretty sure that the brake bias is not good with the SN95 fronts and the larger Mark rear calipers. SN95 setup is 66mm front with a 38mm rear. Mark VII is a 73mm up front and a 45mm in the rear. If you run a 66mm up front and a 45mm out back your brake bias is gonna be really bad even with a manual proportioning valve. Been there done this and all I can say is try to stick with how the factory set the brakes up and do not mix and match if you do not understand how brake bias and ratios work. You have to start factoring in the MC bore size as well and want to end up with around a 3.2:1 ratio or so. A smaller ratio means a shorter, firmer pedal. A bigger ratio means a longer, lighter pedal.

  5. #15
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    Personally, I would run the SN95 width axles with spacers. You can find people selling aftermarket axles fairly easily. If you decide that you want a change of pace with wheels, you can remove the spacers, and get an SN95 wheel that will fill out the wheel wells very easily. If you run longer axles, it will limit wheel options.

    With that said, years ago, I used the 91-92 Mark VII axles, brackets and rotors. The calipers, abutment brackets and lines are the same as the TC. It was a nice fit with the wheels I had, but if I wanted anything wider than a stock wheel, I would have been pushed out of the wheel well.



    It's Gumby's fault.

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