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View Full Version : 8.25" Mopar disc brakes?



lantzn
10-12-2006, 07:31 AM
I was given a 75 a-body 8.25" Mopar rearend for my 68 cuda project. I plan on matching it up to a 360 and 904 over/under tranny. I want to have a all wheel disc brake setup. How come everyone makes a 8.75 or dana kit but nothing for the 8.25? I was told these rearends are plenty strong for most small block situations and are way cheaper and much more common then the a-body 8.75.
So what's up, why don't more vendors support this rearend?

go-fish
10-12-2006, 01:00 PM
Simply because it is the #3 out of 3 rears for Mopars. The Dana is the top dog for strength, then the 8 3/4 isn't that far behind a Ford 9" and is plentiful. The 8 1/4 is basically the runt/economy rearend.

Personally, I had suregrip 8 3/4 that failed me twice and had a 8 1/4 single leg that I had abused more and it never gave. The more power went to the smaller unit too, it was a taller gear though.

Given that, I would still narrow a 8 3/4 because you can get sure grip, more gears, brakes, etc. I've got a S60 under the 'cuda and I think it's a little overkill.

67bird
10-12-2006, 02:16 PM
I may be wrong but this rear is used in Early 2000 and later Dodge Durango's. Some of the later (2002-2003) had rear disk brakes. You may be able to pirate a set from them.

lantzn
10-12-2006, 04:14 PM
Thanks Bird I'll check into that.

Fish no doubt that dana 60 knock-off is overkill. The last time I saw a a-body 8.75 was a used stock one for $600! Not even rebuilt. That's reduculous. Years ago I converted a 71 Dart from a slant six to a 360 like I want to do with this car. It had a 727 and 8.75 out of a 67 Coronet. The rear on the 66-67 is 2" wider and so I used a set of offset rear leaf shackles and it bolted right in. Never had a problem. I was told to do this from a bunch of old time Mopar guys at the time.

diffdude
10-13-2006, 07:37 AM
8.25. 1996 and down have 27 spline axles thats not very good for v8 power. In 97 they went to 29 spline. They also have very small front pinion bearings.