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Author Topic: Brake Rotors on the 4x4  (Read 3493 times)

csthompson12

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Brake Rotors on the 4x4
« on: May 22, 2011, 11:33:35 AM »
Hello,
Does anyone have an idea if the front brake rotors on the 3500hd's with the monroe 4x4 conversion are the same as the ones ones used on the 2wd 3500hd's?  On mine its kind of a pain to get at the rotors because they are behind those hub units. I got down to metal on metal and damaged the rotor. >:(

csthompson12

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Re: Brake Rotors on the 4x4
« Reply #1 on: May 22, 2011, 11:36:44 AM »
It is a 1997 3500hd with the monroe 4wd conversion.

Raymo

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Re: Brake Rotors on the 4x4
« Reply #2 on: May 22, 2011, 12:42:23 PM »
They are not the same.

When you pull the hub from the axle, you will find that it is an 8-lug rotor and hub, with a 10-lug adapter bolted from inside the rotor. Those bolts also hold the rotor to the hub. Also worth noting is, the rotors are noticably smaller on the 4x4. (normal 1-ton brakes were used, same caliper, smaller rotor)

As far as I can tell, a rotor from a '91 and OLDER Chevy 1-ton 4x4 WITH a dana 60 will work.


'94 3500-HD, Cummins, Getrag, NP205. Shortend rear frame with a Pickup Bed. Dana 60 front, stock 80 rear.

'03 2500-HD 8.1 and Allison

Raymo

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Re: Brake Rotors on the 4x4
« Reply #3 on: May 22, 2011, 01:26:32 PM »
Here is a picture of the hub/adapter and how the rotor is affixed.



The rotor slides over the back of the hub and centers on the shoulder, and is held with those allen head bolts.
« Last Edit: May 22, 2011, 01:30:25 PM by Raymo »
'94 3500-HD, Cummins, Getrag, NP205. Shortend rear frame with a Pickup Bed. Dana 60 front, stock 80 rear.

'03 2500-HD 8.1 and Allison

csthompson12

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Re: Brake Rotors on the 4x4
« Reply #4 on: May 24, 2011, 10:03:15 AM »
Alright thanks for that info. I could take it off and see if napa could match it up to one.

csthompson12

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Re: Brake Rotors on the 4x4
« Reply #5 on: May 28, 2011, 08:49:53 PM »
Got my rotor on. Your right, the one from an older 1-ton did work. I'll post the part number. My hub looks a little different than yours. My rotor was held on with regular hex bolts, instead of the allen bolts. Mine also has slots on the inner-end of the hub for anti-lock brakes.

Hey raymo, do you know what size the nuts are that that hold the hub and wheel bearings tight.  I didn't have the right socket, so I just used a small chisel to remove them. They seem to be about 2"-21/2" nuts. I think I've seen the socket thats used to remove them, Its sort of a stamped steel socket. Its also got to be somewhat deep to go over the axle shaft.
Thanks

csthompson12

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Re: Brake Rotors on the 4x4
« Reply #6 on: May 28, 2011, 08:54:45 PM »
On mine it seems that the hub/adapter is all on piece ??? I should have took a pic of it when I had it off

Raymo

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Re: Brake Rotors on the 4x4
« Reply #7 on: May 28, 2011, 09:03:46 PM »
Well, I'll be honest, that 10-lug adapter was on a Ford, but same idea...  ;D

It's been a while since I've dealt with those stupid spindle nuts, but I'm pretty sure they were an odd size, I believe 2-7/16". Dodge was notorious for using those, and I believe the tag specified older Dodge on the stamped socket at the part store.

I haven't had good luck with those POS sockets, I drive it off as you did, and replace it with spindle nuts from a GM 14-bolt rear (full-floater). They use the 6 prong socket like a smart person's axle and have the same thread.

Oh and looking like one piece, the adapter is a snug fit, and probably near impossible to get off by now. I'll post a picture of how they come apart later, but there's no need as there's nothing to service on that side of the outer hub.
'94 3500-HD, Cummins, Getrag, NP205. Shortend rear frame with a Pickup Bed. Dana 60 front, stock 80 rear.

'03 2500-HD 8.1 and Allison

 


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