Gen 1 rear brakes on Gen 2

[batchman]

Hi, appreciate any help here. Car is apart and planned backdate isn't working out. Got the idea from this forum, have searched and not found answer.

Here goes. Car is a 93 MTX that is getting new rear brakes. Have calipers, rotors, and caliper brackets from an 89 to go from solid to vented. Appears I need spindles too??? The caliper will not align to the rotor (about 1" inboard) and the bolt center on the caliper bracket isn't right either.

So do I need the spindles from an 89???

Many thanks if you've done this!!!
- Jeff
93 1-owner SHO, 141k on OE clutch!

 

[jelloslug]

Yes I do believe that you will need the '89 spindles (and possibly the knuckles). You will lose the ABS also, since ABS was not an option in '89 and the sensor ring is not there.

 

[batchman]

Yup you're right, just realized that a minute ago. I think that means I need 92 spindles to keep ABS working. So if anybody out there has a set of these ready to go I'm all over it!

It just gets more interesting (ugh)....

- Jeff

 

[K-Dawg]

I'm not an expert on rear SHO brakes, but I believe the 89 SHO rear brakes are different than the 90-92 SHO rear brakes. I'm not sure if your 89 parts will work on 90-92 spindles.

FYI, 90-92 SHO rear brakes are the same. They all had ABS and vented rotors.

 

[rangerj]

Why not upgrade to 96 brake standards? Why go backwards? rangerj

 

[batchman]

FYI, 90-92 SHO rear brakes are the same. They all had ABS and vented rotors.

Ah HA. Maybe what I've got is an 89 caliper bracket...

Does anybody know of a list of part numbers for this stuff? The Ford parts guys are just not up to this kind of swap.

Or if anybody has some of these parts in a box (and knows which year it came from), could you measure the bolt centers on the caliper brackets for each style 89, 90-92, 93-95?

Rangerj, we're talking back brakes here. The 96 upgrade is for the fronts, which I plan to do next. The idea of backdating is that Gen 2 has solid rotors, while Gen 1 had vented.

Thanks, keep 'em coming!
- Jeff

 

[jelloslug]

You will need 90-92 calipers, pads, mounting plates for the calipers, and the rotors. I don't think anything from the '89 will work but don't quote me on that.

 

[twr]

I have a bunch or rear brake parts from when I did my back date. I finally had to use the 92' brake parts with 89' rotors to get mine to work. My recollection is the caliper, and caliper bracket are the same for the 89' through 92' The part numbers are different, but they measure out the same. The back plate is different on the 89's. I tried to use all 92' parts and the rotors were hitting the outboard side of the caliper bracket. Using the 89' rotors and 2 SS washers to shim the bracket inboard did the trick. I was told it would be simple swap from 92' to 95', I'm not sure if they changed something on my 95' but it didn't work for me. I'll take some pictures and measurements when I get home tonight.

 

[pjtoledo]

Yep, the 89 calipers and the caliper brackets are what you want. They are basically the same as 90,91, and 92.
The rear spindles have nothing to do with ABS. Any rear spindle, 90 thru 95 will do, they are all identical.
You need the mounting plate that attaches directly to the spindle from a 90,91,92. They have the ABS holes in them.
You need the rear hubs, again 90,91,92.

Only the Ebrake cable and the actual spindle interchange between the vented vs non-vented systems. The mounting plates are different, the brackets are different, the calipers are different, the hubs are different, the pads are different, the rotors are different. Well, ok the bolts are the same, but not the bolt holes.

OK, lets sum this up,,to put vented rear brakes on a 93 you need
:89 thru 92 pads, calipers, caliper brackets
:90 thru 92 mounting plates (with ABS holes, not sure if all plates have them)
:90 thru 92 rotors
:90 thru 92 hubs-includes bearings


Anybody think of anything else? There may be some other combinations that work, but this is how I did mine. The 89 mounting plates may look like they work, but they move the caliper/bracket out 3mm, just enough to hit the rotor. The 93 hubs look the same, but they are 3mm shorter, and will cause the caliper/bracket to smash into the other side of the rotor.

Perry

 

[batchman]

Awesome, thanks very much for the "improved recipe". Here's one for the search engine.

Well it's off "in search of..." for me.

Thanks again,
- Jeff