differences between 87-93 donor and and 94-95 for MKIII?

[tcsracing1]

I have a MKIII chassis/body.

I recall specing it for a 87-93 mustang donor when i bought it, however I have a really good 1994 donor.

What are parts will not fit on my chassis?

[michael everson]

Everything will work. The only thing you might want to change is the rear axles. They are about 3/8 wider per axle as compared to the 87-93. or buy wheels with the right offset. If you switch the axles you will also need offset brake brackets. Richard Oben at North Race cars has everything you need. Other that that, they make a great donor.
Mike

[MPTech]

Weren't there some anomalies with the front engine cover that were only available a year or 2 and not widely supported with after-market?
I believe the wiring / computer is also a little more complicated.

[michael everson]

Yes the front dress is different. But if you use the engine as is, it won't be an issue.
Mike

[tcsracing1]

thanks Guys.

I am installing the donor parts from the 1994 on my chassis tommorow and i wanted to make sure i wouldnt run into any problems.

For the record, I have sourced a 4.6 Cobra motor with tranny and solid rear end from a 2003 Mustang race car.
What problems will i have with the 87-93 5.0L motor mounts on my chassis?

With my 94+ rear end, will FFR be able to spec me a set of Trigo wheels to fit or will i be better off converting rear end to 87-93?

[michael everson]

Convert the rear end. It will look better with deeper wheels. chassis engine mounts are the same.

Mike

[Jeff Kleiner]

...and solid rear end from a 2003 Mustang race car...


The 2003 rear end is even wider than the '94 version. Here's how they stack up:

'93 and earlier=59.25" wide
'94-'98=60.75" wide
'99-'03=62.25 wide

The '94 through '98 axle HOUSING is the same width as the '93 and earlier Fox version however the axle SHAFTS are longer. All of the extra shaft length is outside of the housing to accomodate the ABS tone rings. The '99 and later rears have a wider housing and longer axle shafts and can only be brought to Fox width by cutting the housing and replacing the axle shafts. The '94-'98 rears are much simpler; without modifying the housing they can be brought to Fox ('87-'93) width and retain their 5 lug disc brake configuration by swapping axle shafts and using caliper relocation brackets available from Richard Oben at North Racecars as Mike mentioned.

http://www.northracecars.com/Brakes.html

If you decide to stick with the wide rearend Richard is also your source for custom offset Team III wheels (but IMHO you'd be money ahead to trade for a '94-'98 unit, convert it to Fox width and use "off the shelf" wheels).

[tcsracing1]

The 2003 rear end is even wider than the '94 version. Here's how they stack up:

'93 and earlier=59.25" wide
'94-'98=60.75" wide
'99-'03=62.25 wide

The '94 through '98 axle HOUSING is the same width as the '93 and earlier Fox version however the axle SHAFTS are longer. All of the extra shaft length is outside of the housing to accomodate the ABS tone rings. The '99 and later rears have a wider housing and longer axle shafts and can only be brought to Fox width by cutting the housing and replacing the axle shafts. The '94-'98 rears are much simpler; without modifying the housing they can be brought to Fox ('87-'93) width and retain their 5 lug disc brake configuration by swapping axle shafts and using caliper relocation brackets available from Richard Oben at North Racecars as Mike mentioned.

http://www.northracecars.com/Brakes.html

If you decide to stick with the wide rearend Richard is also your source for custom offset Team III wheels (but IMHO you'd be money ahead to trade for a '94-'98 unit, convert it to Fox width and use "off the shelf" wheels).

Thanks Guys.
I have a stock 1994 rear end and a racing rear end from a 1999. (the 1999 could be an aftermarket rear end which could be anything)

I will look into this further.

[CraigS]

Search here and on the other forum. This comes up every three months or so and gets a lot of info in the threads.

[kkcalm5]

Yes the front dress is different. But if you use the engine as is, it won't be an issue.
Mike

what is diff about the front dress?
was thinking about a 33 HR build using a 94/95 as a donor car.
are the heads, intake the same?
Kevin

[tcsracing1]

i converted my 1994 rear end to the North Race Cars axles.

What rear gears do you guys suggest?

I also have a 1997 5.0L ford explorer rear end. Anything it might be useful for? gears?

[stack]

the T5 and bell housing is also different. about 3/4 inch longer if i remember right

stack

[CraigS]

Yes, 94-95 302s and trans and bellhousing were different. The front dress was squashed to be thinner and the bellhousing is longer as is the trans input shaft. In an FFR this moves the trans rearward so the driveshaft needs to be shorter. Tcs, rear gear depends on engine output. 355 is very common for 302s. As engine size increases, 331 or 327 can be better. 5th gear ratio also plays a role. Standard T5 5th is .6x so that is pretty dang tall so what most of your driving will be comes into effect too.

[tcsracing1]

Yes, 94-95 302s and trans and bellhousing were different. The front dress was squashed to be thinner and the bellhousing is longer as is the trans input shaft. In an FFR this moves the trans rearward so the driveshaft needs to be shorter. Tcs, rear gear depends on engine output. 355 is very common for 302s. As engine size increases, 331 or 327 can be better. 5th gear ratio also plays a role. Standard T5 5th is .6x so that is pretty dang tall so what most of your driving will be comes into effect too.

thanks.
I have a stock 1995 mustang rear end so i am not sure of the gears?
My transmission came from a spares package included with a 1999 mustang race car that i purchased. Could be any year T5. How can i tell?

[JNC]

thanks.
I have a stock 1995 mustang rear end so i am not sure of the gears?
My transmission came from a spares package included with a 1999 mustang race car that i purchased. Could be any year T5. How can i tell?

You do realize that a 4.6 mod motor is not compatible with a T5, right?

EDIT: Just noticed that those pics are of a T45, so never mind...:cool:

Also, I think that the inner foot box walls are different between the sbf and 4.6 FFR kits.

[tcsracing1]

You do realize that a 4.6 mod motor is not compatible with a T5, right?

EDIT: Just noticed that those pics are of a T45, so never mind...:cool:

Also, I think that the inner foot box walls are different between the sbf and 4.6 FFR kits.

i am using a MKIII kit for 1987-1993 mustang.
However, my rear end, brakes, spindles, pedal box and steering rack are 1995 mustang.
My engine is 1997 explorer.

the transmission is from a 1999 4.6 race car. Thanks for pointing out what it is. Hopefully i can use it without too much trouble.

[JNC]

i am using a MKIII kit for 1987-1993 mustang.
However, my rear end, brakes, spindles, pedal box and steering rack are 1995 mustang.
My engine is 1997 explorer.

the transmission is from a 1999 4.6 race car. Thanks for pointing out what it is. Hopefully i can use it without too much trouble.

Thought you were going to use a 4.6 cobra motor for some reason...

Anyway, the bolt patterns are different between 4.6 and sbf bell housings, so the T45 ain't gonna work on your exploder motor.