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Disc brake conversion on a 46 1 1/2 and 2-ton #708681
Tue Jan 04 2011 03:53 AM
Tue Jan 04 2011 03:53 AM
R
RDomeck  Offline OP
Shop Shark
Joined: Nov 2010
Posts: 603
Indianapolis, In 46254
I have the parts coming in from a 3500HD chevy truck with a 15,000lb. GVW. Has anyone ever done a conversion like this. I already have a dual circuit master in place of the old single circuit.

Would there be any interest in making the brackets and rotor mount? I believe I can make an adapter to mount the rotor on the original hub and mount the caliper to the original spindle were the backing plate mounts.

I run a fabrication business and I have done more than a few conversion like this. Just wanted to see if anyone else would like to do this conversion!

Last edited by RDomeck; Mon Aug 07 2017 04:06 PM. Reason: Updated fitment

Randy Domeck
Indianapolis Fabrications
rdomeck@me.com
Indianapolis, In. 46254
317-258-0039

Re: Disc brake conversion on a 46 2-ton [Re: RDomeck] #708694
Tue Jan 04 2011 04:23 AM
Tue Jan 04 2011 04:23 AM
F
fclaridge  Offline
Shop Shark
Joined: Dec 2008
Posts: 378
Tenino, WA
I know I've seen conversion kits for the lighter trucks, but would be interested to know how much a conversion kit for a big truck would cost if there was ever one created. My bus is a 56 1 1/2 ton. Although I just spent almost $500 to have all the drum brakes and components redone I would still be interested in a disc conversion.


1956 Chevy School Bus Superior Body
In the Stovebolt Gallery
More pix in Photobobucket
Re: Disc brake conversion on a 46 2-ton [Re: fclaridge] #708699
Tue Jan 04 2011 04:50 AM
Tue Jan 04 2011 04:50 AM
W
webstershotrods  Offline
Shop Shark
Joined: Apr 2010
Posts: 482
Temple ,TX
I would like to see the conversion.What bolt pattern do you plan to use ?


Stovebolt Gallery
1952 Chevy 3100
1953 Chevy 4400
1965 Nova
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Re: Disc brake conversion on a 46 2-ton [Re: webstershotrods] #708741
Tue Jan 04 2011 09:16 AM
Tue Jan 04 2011 09:16 AM
R
RDomeck  Offline OP
Shop Shark
Joined: Nov 2010
Posts: 603
Indianapolis, In 46254
I would still use the original hub so you wouldn't have to change the bolt pattern on the wheels. I'll post some pictures when I get the parts made.


Randy Domeck
Indianapolis Fabrications
rdomeck@me.com
Indianapolis, In. 46254
317-258-0039

Re: Disc brake conversion on a 46 2-ton [Re: RDomeck] #708742
Tue Jan 04 2011 09:22 AM
Tue Jan 04 2011 09:22 AM
D
dmulally  Offline
New Guy
Joined: Dec 2010
Posts: 24
Sydney, Australia
Gday Buddy

I would be interested. I have a 51 1.5/2 ton. (not sure which...its huge)

Cheers

Damo

Re: Disc brake conversion on a 46 2-ton [Re: dmulally] #708762
Tue Jan 04 2011 02:30 PM
Tue Jan 04 2011 02:30 PM
G
Grigg  Offline
.
Joined: May 2005
Posts: 8,985
Lexington, VA
Curious to see what you come up with as well.

I think you'll find that the bolt pattern on the 3500HD axle is the very same as the original truck, with a possible exception of stud size and the old hubs have a smaller wheel pilot diameter, new ones will be 5.25"

Here's another approach using 3500HD and or P-30 axle parts.
In my research and fabricating using the new I-beam as well as the new hubs, rotors, and related parts seemed like the best plan.
http://www.stovebolt.com/techtips/bigbolts/p30swap/

Grigg


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Re: Disc brake conversion on a 46 2-ton [Re: Grigg] #709019
Wed Jan 05 2011 05:02 AM
Wed Jan 05 2011 05:02 AM
R
RDomeck  Offline OP
Shop Shark
Joined: Nov 2010
Posts: 603
Indianapolis, In 46254
I was looking for a little bit less work for the conversion. I know that you can put a different axle under it, but that is a lot of work for someone to do. I am hoping to make a bracket that bolts on he the spindle and make an adapter ring that goes between the original hub and the new rotor. I received the parts in today and will try to fit them up sometime next week.

Would you rather find a complete front axle and spend the time to swap it out or would you rather pull the hub off, mount a rotor to it and bolt a caliper to the spindle and bleed the brakes?


Randy Domeck
Indianapolis Fabrications
rdomeck@me.com
Indianapolis, In. 46254
317-258-0039

Re: Disc brake conversion on a 46 2-ton [Re: RDomeck] #709203
Wed Jan 05 2011 09:07 PM
Wed Jan 05 2011 09:07 PM
C
CORPO  Offline
Shop Shark
Joined: Mar 2009
Posts: 188
IL
I did something like what I think you are planning on doing, perhaps not

Heres what I did, I have not put it on the road yet but all the bracketry is done for the rotors, Im currently working on putting a hydrobooster in my truck to run these twin piston calipers.

http://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=682737&page=1

Im doing alot to my truck, so finishing up the breaks has not been the highest priority...

Last edited by CORPO; Wed Jan 05 2011 09:09 PM.
Re: Disc brake conversion on a 46 2-ton [Re: CORPO] #709230
Wed Jan 05 2011 11:10 PM
Wed Jan 05 2011 11:10 PM
R
RDomeck  Offline OP
Shop Shark
Joined: Nov 2010
Posts: 603
Indianapolis, In 46254
Corpo, that looks nice. However, I'm looking into putting larger rotors and calipers on. The rotor's are almost 14" that I have here. I should be able to make an adapter ring to go from the hub to the rotor out of 3/8" of 1/2".

I see no reason to use anything thicker then the casted rotor! The mild steel that I will use will be stronger than the cast iron in the rotor. I hope I can mock something up this week. I'll keep you guys posted.


Randy Domeck
Indianapolis Fabrications
rdomeck@me.com
Indianapolis, In. 46254
317-258-0039

Re: Disc brake conversion on a 46 2-ton [Re: RDomeck] #709333
Thu Jan 06 2011 04:23 AM
Thu Jan 06 2011 04:23 AM
C
CORPO  Offline
Shop Shark
Joined: Mar 2009
Posts: 188
IL
Not that it matters, but you can get larger ones then the 12" rotors I used from the higher end after market brake companies.. I know the wilwood kit (for 6 lug GM) has 16" inch rotors, if I recall when I was doing my research there were some that were even bigger... but these kits werent cheep and I was on a budget and didnt need a kit engineered for an Escalade or tahoe... I never did contact them to see what the price of just the rotors would be

I am definitely interested in seeing how your conversion works out, this is my first big bolt, but one day I want to do a COE so I will do it all again...

Are the parts you are using 8 lug? Are you going to machine your adapters or have them CNC from some plate?

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