brake4

Guys,

I'm pretty sure Prostreet's calipers on page 2 are not Wilwoods.  The calipers on the Crush (Coloradoamx) are Forged Superlite 4 piston Wilwoods.

The picture I posted is a conversion kit to put Cobra calipers on a Mustang. These calipers would simply bolt on to your factory caliper bracket with this adaptor plate added. You would also put a 13" Cobra rotor on your drum brake hub. I also found some pics on Photobucket.com of this setup on an AMX. The guy fabbed up his own adaptor brackets and trimmed the factory hub so the cobra 13" rotor would fit. I also have a pic of a similar 1 piece bracket for an early Ford that has the 4 hole mount for the spindle as well as the tabs and holes for the caliper. While probably not correct for AMC, it looks pretty close. The only difference between the Cobra calipers (other than size) is that the Cobra calipers have longer mounting tabs to space them out for the larger rotar. They would bolt on to the same non-cobra tabs. If a brake company looked at what is already out there to work with, the R&D would be much easier. I'm not sugesting that they reinvent all new parts, just add a few AMC specific pieces so it would be more universal. A bracket similar to this would solve about 90% of the problem. I think this is a Mustang Steve's part.

Edited by prostreetamx - Mar/13/2010 at 4:45pm

OK Rear Dana 20 disk brake setups. Remember I"said" for "Jeeps". I was unaware of the setup Randy is selling at Performance American style for AMCs. I'll add another two , one for jeeps , one more universal.

Off Road Unlimited has a kit. See there web site at :http://www.4wheelparts.com/Brakes/Off-Road-Unlimited-Rear-Disk-Brake-Kit.aspx?t_c=65&t_s=23&t_pt=6401&t_pl=9817. This kit is primarily for Jeeps and has the axles with it ,FOR WHAT looks LIKE 6 BOLT WHEELS. So you are unlikely to use this on an AMC. But there are options, so i think you would have to call and ask.

The number two setup is from SSBC. This setup will work from the look of it on AMCs. Again there are options , including one piece axles. Web site is at: http://www.ssbrakes.com/commerce/brakefinder/?make=Jeep&model=CJ-7&engine=All&year=1978&cat=Rear%20Brakes&sub=%28H%29%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20Single%20Piston%20Rear%20Brake%20Kits.

* Bullet point here: I believe there is a bit of difference in the axle length between the AMC Dana 20 for cars and the AMC Dana 20 for jeeps. The Jeeps are shorter I believe.

* The setup are primarily made for CJ-7 s They will work for AMC with the notation of the axle length difference. I've seen a few done this way. So nothing new here. Lord love the Jeepers or we
would a whole lot less parts for our AMCs.

* Note: While doing the research I did notice that a lot of the jeeps were switching to DANA 44s and or other heavier duty rear ends. There seem to be a good number of rear disk setups for the Dana 44 used on the latter period of Jeeps.

* Note: aside: Kaiser-Frazer and the Argentine IKA-Renault versions of there AMCs built in Argentina used the DANA 44.  Not that hard a change over.(with the right rear end).

* Note : Personally  I would not spend money redoing a Dana 20 with rear disk brakes. The 20s are just too weak and it's easier to change over to a better rear end. If I'm spending that kind of money. That what I did on my 69 AMX. I used a Ford L-V nine inch rear end and an SSBC new rear
disk brake setup.

Note to the note * The L-V rear disk parts are just too hard to get and expensive when you do find them. So, thus the switch to newer parts. Only is now I have a metric rear disk brake setup on my 69 SAE bolt type car.

*Note: AMC did have a four wheel disk brake system for the Trans-Am series. They used the GM type Corvette 4 piston delco type system. In theory it was an option on Javelins and AMXs. (For about $2,000 , back in the day.) So you never see it. AMC did just enough to get through as a option. Rumor was the 4 four disk setup went to Australia as part of the CKD kits.

 LRDaum

There was talk about this in a post some where either on here or the other site. The floating axle is when stock axles are used as they get shimmed at the left axle IIRC. One piece axles (like above) do not need to be shimmed so they don’t float. It is this floating that pushes the piston(s) back into the caliper so when you hit the brakes the peddle is low so you have to pump the brakes for the peddle to come up. Again 1 piece you don’t have this issue.

If I am wrong some one will say so.

Dave ----