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2
Drivetrain Tech / Re: Axle swap
Last post by Chuck W -
So from what I understand (Chuck or Eric correct me here) is that the:

1) 87-88 Turbo Coupes had the 8.8 rear end that was the same housing width as the 86-98 Mustang 8.8 housing and were disc brake.
Correct.

2) The 88 XR-7 Cougar had a drum brake 8.8 that was the same width as the Turbo Coupe rear end from axle flange to axle flange but the housing is the same as the 86-98 Mustang 8.8 housing and not very common.
Correct. There was a V8 Cougar that had an 8.8 drum brake rear. Narrow housing. Longer axles.
 

3) There were some 87-88 Thunderbirds that had an 8.8 with drum brakes but I believe the housing was wider like the 7.5" housings.
No. There were no 8.8's in any other 83-88 Tbird, other than mentioned in #1 and #2. All 86-88 TBIrds/Cougars (Not listed above) had the wide housing 7.5.

I looked at the chart and the XR-7 is not discussed not is any type of 8.8 drum brake rear end.
3
Drivetrain Tech / Re: Axle swap
Last post by EricCoolCats -
So from what I understand (Chuck or Eric correct me here) is that the:

1) 87-88 Turbo Coupes had the 8.8 rear end that was the same housing width as the 86-98 Mustang 8.8 housing and were disc brake.
2) The 88 XR-7 Cougar had a drum brake 8.8 that was the same width as the Turbo Coupe rear end from axle flange to axle flange but the housing is the same as the 86-98 Mustang 8.8 housing and not very common.
3) There were some 87-88 Thunderbirds that had an 8.8 with drum brakes but I believe the housing was wider like the 7.5" housings.

I looked at the chart and the XR-7 is not discussed not is any type of 8.8 drum brake rear end.

1) Correct.

2) Correct.

3) I don't believe any 1987-88 non-Turbo Coupe got an 8.8" rear. At least, I've never found any evidence. Even the 1988 XR-7's got the 7.5" rear. Now in 1988 only, the rear drums went to 10" regardless of model, and that was for V6 and V8 cars. (I have heard from a few people that their car still had 9" drums but those are exceptions).

It is possible to take an 8.8" housing and use T-Bird/Cougar axles, backing plates, and 10" drum hardware and make your own 8.8" drum rear.
5
Drivetrain Tech / Re: Axle swap
Last post by Aerocoupe -
So from what I understand (Chuck or Eric correct me here) is that the:

1) 87-88 Turbo Coupes had the 8.8 rear end that was the same housing width as the 86-98 Mustang 8.8 housing and were disc brake.
2) The 88 XR-7 Cougar had a drum brake 8.8 that was the same width as the Turbo Coupe rear end from axle flange to axle flange but the housing is the same as the 86-98 Mustang 8.8 housing and not very common.
3) There were some 87-88 Thunderbirds that had an 8.8 with drum brakes but I believe the housing was wider like the 7.5" housings.

I looked at the chart and the XR-7 is not discussed not is any type of 8.8 drum brake rear end.
7
User Rides / Re: Chuck's '83 TBird
Last post by Chuck W -
Took apart the MS unit the other day to swap out the old serial port with the USB/serial adapter.




Checked out the ECU to make sure it connected to the laptop fine, and reinstalled the ECU and the battery.

Got it fired up a couple days ago, but haven't had a chance to get it out for a drive yet, but that's coming soon.

Ready for a new season.  :smile:
8
Drivetrain Tech / Re: Axle swap
Last post by JeremyB -
It's been a minute, but I'm running 99-04 axles  and SN95 solid discs in my 87 7.5" rear end.

On paper it works perfectly, but I had to put small spacers to get the disc and caliper to properly align IIRC.
9
Drivetrain Tech / Re: Axle swap
Last post by Chuck W -
Looking a the axle chart listed in the pinned thread in this section (HERE

I have postulated that MAYBE you could use the 99-04 axles and brake set up on your wide 7.5 housing in your Sport. The numbers are really close. At least according to the chart.

You would need to swap to the rear discs though, and your flange to flange width would be 1.5" wider.
This is all just a guess though.

If you're keeping the drums, you'll need to either have your current axles converted to 5-lug or buy new, custom ones and use some Ranger drums.

94-98 Axles won't work in your wide housing. The bearing surfaces are in the wrong location. If your car was an 83-85, you'd have the narrow housing that would work with the 94-98 axles.

10
Drivetrain Tech / Re: Axle swap
Last post by Beau -
Yup, what Darren said. I know it sucks, but really, any rear from '94-98 will yield the axles you want. AFAIK, the brakes are the same across all those years, so what you already have harvested will do for you. (I'd probably spring for remanned rear calipers, when those shits seize, they're a pain, unless you have the stuff to take 'em apart and know how)..

I had/have what amounts to the same setup on both my Thunderbird and now on my '87 Mustang. Up front is the dual piston calipers,

On my 'Bird I had a bastard setup....used the stock Tbird Sport's backing plates, '97 Stang V6 axles (again, no matter if it's V6 or V8, the shafts themselves are the same), but I kept that car drums, and used Mercury Marquis drums, these were 10" drums and not the usual 9". With that setup, I HAD to have the Sport's back plates, all others were 9" drums, so....there's *probably* a way, but with all the Mustang shit in the yards now, no reason not to step up to dscs. I just did it to see if it could be done.

Now in my Mustang, I ran Ranger axles and kept the stock drums. There was no way to make a hybrid system as the axles are too short for that setup.

When I get the T5 rebuilt, I'll probably be swapping to discs and throwing a 3.73 in with a new Trac Lok.


BTW, if you've not ran the PBR calipers yet, holy shit, you'll feel like you're going to leave your teeth in the steering wheel.. LOL