Dana 70 dually disc brake upgrade - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 03-25-2010, 05:39 PM   #1 (permalink)
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Dana 70 dually disc brake upgrade

I just wanted to share my recent experience with trying to replace the drums with discs on my tow rig a 1990 K30 crew cab dually. The key issue was being able to retain the stock dually wheels. So this is what I learned with help from you guys on the board, and Kert from DIY4X4. Initialy I was under the impression that mid '80s Chevy 3/4 ton front rotors were what I needed for the conversion but I had severe misalignment and needed rotors with a roughly 2" more added depth. Turns out that the rear rotors from a 2003 Chevy Express 3500 Van dually were almost perfect for what I needed. If I add 1/4 spacers between the hub and the rotor then my caliper would be perfectly centered on the rotor. Here are a few pictures. This has been done before im sure, but I had a bit of trouble finding the info easily on board so I thought this might help someone in the future that's trying to do the same thing. Thanks again to Kert, and NVRENUF for your help.

This is what I had with 3/4 ton rotors (I had the DIY4X4 brackets on backward at this point, trying to see if that would help or not.


Then with the van rotors, and the bracket turned around and properly mounted



Last edited by bad67deuce; 03-25-2010 at 05:41 PM.
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Old 03-30-2010, 07:30 AM   #2 (permalink)
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Do those rotors might allow for a drum style ebrake on the inside?
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Old 03-30-2010, 08:35 AM   #3 (permalink)
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so does it clear the duelly wheels? can we see some pic with the wheels on?
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Old 03-30-2010, 12:42 PM   #4 (permalink)
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Quote:
Originally Posted by RockHind View Post
Do those rotors might allow for a drum style ebrake on the inside?
yes, that is the orig. application, "drum inside hat" as its been called.
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Old 03-30-2010, 10:50 PM   #5 (permalink)
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Can you provide some measurements? Say rotor width, diameter, and offset from the WMS to the rotor surface. I am curious if these might work on a 70U.

Cool find.
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Old 01-06-2011, 06:07 PM   #6 (permalink)
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I'm in the same situation with a Dodge dually D70-2U out of an 89 1 ton 4x4 w350 chassis cab. I'm going to purchase the above rotor and caliper brackets from diy4x and will photo/describe my results.
Josh

Last edited by jopickens; 01-06-2011 at 06:08 PM.
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Old 02-22-2011, 10:01 PM   #7 (permalink)
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I tried it - it works nice...

https://www.pirate4x4.com/forum/showthread.php?t=958204
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