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1
Drivetrain Tech / Re: Axle swap
Last post by Chuck W -

So you you were able to use axles from 99-04 and they worked with spacers? What kind of spaces and where did I you place them? 


More than likely on the caliper mounting bracket locations, to get the caliper better centered over the rotor.
It will be pretty evident when you bolt it all up.
2
Drivetrain Tech / Re: Axle swap
Last post by count -
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.

So you you were able to use axles from 99-04 and they worked with spacers? What kind of spaces and where did I you place them? 
3
Drivetrain Tech / Re: Axle swap
Last post by EricCoolCats -
Beau, close... 9" were finned, 10" were smooth.
https://www.coolcats.net/restoring/brakes.html

I appreciate that Ford put larger drums on at the end of the run. That's something they commonly do for whatever reason. The 1997 Cougars/T-Birds all got 4-wheel disc standard, and the front rotors were larger, just for that last model year of the body style. So I guess our cars set the precedent for that LOL.
4
Drivetrain Tech / Re: Axle swap
Last post by Beau -
To aid in distinction (that is, if there are any of these left in yards by now) the 9" drums were all smooth, the 10" were finned..

I have heard of some '88 Cats that had the bit drum 8.8 but have never seen any, either here on the forum or in junkyards. Have came across a few '88 XR7 cars in yards but all had the 7.5 but 10" drums.

6
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.
7
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/1988 non-XR7 got an 8.8" rear. At least, I've never found any evidence. Even the 1987 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.
9
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.