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Thread: Help! 7.5" Axle to 8.8" Trouble!

  1. #21
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    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    Quote Originally Posted by JeremyB
    The only reason I say all the rears are the same is from corral.net/corner-carver.com searches and Kirschenbaum. I hope the threads I linked to you over on the Corral put your mind at ease.
    Sorry for my ignorance, but Im trying to clear this up for everyone...

    From what I understand the 8.8 mustang rear, 7.5 mustang rear, 8.8 turbo coupe rear, and lincoln lsc rears are all the same width. BUT the tbird 7.5 rear is not on that list. The mustang 8.8 and tc 8.8 are identical in width, but the axles on the TC are longer due to disc brakes. Since the tbird 7.5 does not have disc brakes, it still needs to be the same overall width as the TC rear, but the rearend itself is wider to compensate for no disc brakes. Therefore 7.5 rearend axles will not work in a 8.8TC rear properly without mods. So I think the best alternative is to use 8.8mustang axles in a TC 8.8 if one wants to retain drum brakes. Agree?
    1988 Tbird Stock bottom end 306, Windsor Jr's, Explorer intake, 125 shot.
    Best ET: 12.11 Best MPH: 113.8 1/4 mile

  2. #22
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    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    I think you got it exactly. Mustang axles go right in. If you are staying with the 28 spline than pick up a couple of used axles at the yard. This way if for some reason you theory does not work you are not out much. In fact you could just pick up one to try for now. If you are going with the 31 spline than I used Superior axles.

    Very good information, sorry you had to go through all this.

    TED

  3. #23
    im gay as hell Guest

    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    so theres no way to convert to 5 lugs with a 7.5 rear in a tbird with out changing axle size

  4. #24
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    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    Quote Originally Posted by im gay as hell
    so theres no way to convert to 5 lugs with a 7.5 rear in a tbird with out changing axle size

    Yes there is...use 94+ Mustang axles.....same length as those in the Tbird..... I converted the 7.5 in the 84 XR-7 with axles from a 95 Mustang.......
    Long live the 4-eyes! - '83 Tbird Turbo

  5. #25
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    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    But chuck, weren't the T-bird/Cougar 7.5 rears the same dimensions as the Mustangs up until mid-year of 1985? That guy is talking about his 87 T-bird. The 94 and up axles worked in your 7.5 because it's of the early years; I don't thing this kid will have the same luck.

    Joe
    Last edited by joefriday; 06-29-2005 at 11:07 PM.

  6. #26
    im gay as hell Guest

    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    will it work or not

  7. #27
    im gay as hell Guest

    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    or what other shafts can i use from what other models of car

  8. #28
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    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    ....*sigh*

    Now this thread makes baby Jesus vomit.

  9. #29
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    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    Quote Originally Posted by joefriday
    But chuck, weren't the T-bird/Cougar 7.5 rears the same dimensions as the Mustangs up until mid-year of 1985? That guy is talking about his 87 T-bird. The 94 and up axles worked in your 7.5 because it's of the early years; I don't thing this kid will have the same luck.

    Joe
    You know, I never measured the damned thing.... I took an 84 Cougar XR-7 7.5 rear axle housing, stuck 95 Mustang axles in it and am running the TC rear disks.....did not have to use any spacers or voodoo.

    It did have the taller hat drums on it though.

    I do have to admit all my cars have been 83-85....so I have no firsthand experience with the 87-88 cars when it comes to the rear axles.

    I suppose he could just pick up a used 7.5 Mustang housing cheap and be done with it....
    Long live the 4-eyes! - '83 Tbird Turbo

  10. #30
    im gay as hell Guest

    Default Re: Help! 7.5" Axle to 8.8" Trouble!

    but no one knows which axles shaft you can swap wright in to make this so much easier

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