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Old 01-14-2019, 10:55 PM   #1
Blazerowner
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Dana 44 and 12 bolt 1/2 studs

So I have done a little research and found that possibly 610-219 Dorman studs will replace the 7/16 studs on a Dana 44. This would be a 72 k5 and I was thinking of upgrading. Apparently a drill will make it work. Has anyone else done this? Any other options? Also does anyone know what the part number is for 1/2 on the 12 bolt?
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Old 01-15-2019, 01:31 AM   #2
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Re: Dana 44 and 12 bolt 1/2 studs

I do it all the time for my customers running larger tires. You'll need 2 drill bits. One for the rotor and 1 for the hub. (don't know the sizes off hand) The 219 stud is a Ford F-150 4x application. I've even done a few 9/16'' conversions
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Old 01-15-2019, 07:45 AM   #3
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Re: Dana 44 and 12 bolt 1/2 studs

I just put some longer than stock 7/16" studs in my front hubs. The longer studs had a larger knurled shank but the closest smaller drill size was 37/64" which was only .005 smaller. I drilled the hubs but the new studs didn't seem like they went in hard enough. I believe that .007 - .010 is recommended. I ended up welding them to the hub on the back side as I didn't want to take the chance on them spinning in the future. Just piece of mind.
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Old 01-16-2019, 01:49 AM   #4
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Re: Dana 44 and 12 bolt 1/2 studs

I think the 9/16 studs would be overkill for me. I installed all new 7/16 studs when I rebuilt the diffs. I thought about converting them at the time but I wanted to get it together so I could roll it. It’s pretty easy to tear apart if need be so it’s on the list in the future. So those 219 studs work fine? I assume the hub is a slightly larger bit to clear the knurles on the stud?
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Old 01-16-2019, 11:33 AM   #5
kwmech
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Re: Dana 44 and 12 bolt 1/2 studs

Quote:
Originally Posted by Blazerowner View Post
I think the 9/16 studs would be overkill for me. I installed all new 7/16 studs when I rebuilt the diffs. I thought about converting them at the time but I wanted to get it together so I could roll it. It’s pretty easy to tear apart if need be so it’s on the list in the future. So those 219 studs work fine? I assume the hub is a slightly larger bit to clear the knurles on the stud?
Yes you have to drill both the hub and the rotor

Drill bit to drill out the hub is 19/32

Drill bit for the rotor is 41/64

Last edited by kwmech; 01-17-2019 at 08:36 PM.
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Old 01-18-2019, 12:51 AM   #6
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Re: Dana 44 and 12 bolt 1/2 studs

Definitely some oddball bits. I think I can get them from the local Ace hardware. They have a bunch of bit sizes. Thanks for the info on this.
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