75 C-body axles?

[Mach Manny]

While at the boneyard today, i saw a 75 Imperial with a big block [couldnt tell which] and it had a discbrake rear end. There are 4 bolts behind the backing plate, so the axle shafts are connected to the flange of the housing. I'm curious if anyone can tell me what rearend i was looking at. I didnt count the bolt number on the diff plate, but the case was large i'm thinking d60 or 9 1/4.

I'm just really curious because the axle has discs with calipers and rotors, and it'll probably still be there tomorrow.

[duster360]

it should be a 9 1/4 but to be sure just count the bolts 12=9 1/4 and i think 10=9 3/4

[Mach Manny]

I'm guessing 12 bolts --> 9 1/4. So is this axle desirable? I figure it's a non-clip axle, big ring gear, discs, ... if not in a street car at least a 4x4!

[moparer]

Did those Imperials have the wacky 4x5 bolt pattern like the earlier ones did?

[duster360]

as far as the axle being desireable, it depends its very wide so it limits its useage, the 9 1/4 is a c-clip design. alot of the people i know take them and use the disc brake set up on a 8 3/4. i'm not sure what it takes but it has been done.

moparer- i'm pretty sure its a 4 1/2 bp after 72 or 73 thats what they went to. same as the newyorker and newport underpinings

[txs]

It is a 9 1/4, it is a c clip rear, it has 4 1/2 bolt circle , the imperials went to the 4 1/2 bc for the 74 MY. Why you would want one is beyond me, except maybe for the gee whiz factor. Rotors for those things are made of unobtanium.

[txs]

BTW, that motor will be 440 unless someone changed it.