Rear brake drum question

[Tony71c10]

So I got a 10 bolt rearend for my 84 with a posi installed on my truck. When I went to put the lug nuts I notice the studs where metric. I tried a lugnut out of my Obs and it fit perfect. I also tried to use the drums from my original l rear end but they would not fit due to the hole being too small. Bd88190 is the number on the brake drum but can't find out same match or cross reference. I figured I can maybe drill the hole bigger if I can't find a pair. Not sure if this is the right way of doing it. Or change the studs to standard but that might be too much for me to try on my own.

[SCOTI]

Originally Posted by Tony71c10

So I got a 10 bolt rearend for my 84 with a posi installed on my truck. When I went to put the lug nuts I notice the studs where metric. I tried a lugnut out of my Obs and it fit perfect. I also tried to use the drums from my original l rear end but they would not fit due to the hole being too small. Bd88190 is the number on the brake drum but can't find out same match or cross reference. I figured I can maybe drill the hole bigger if I can't find a pair. Not sure if this is the right way of doing it. Or change the studs to standard but that might be too much for me to try on my own.

Check to see if an OBS drum fits.

[Tony71c10]

Originally Posted by SCOTI

Check to see if an OBS drum fits.

Looks like the obs are 10in and the ones I have are 11.
Drum say DA 11.09 max

[SCOTI]

Originally Posted by Tony71c10

Looks like the obs are 10in and the ones I have are 11.
Drum say DA 11.09 max

Well heck, I was hoping it was going to be easy.

I hate when you have to modify a wearable item to fit something (you should be able to service something easily). I'm curious if this axle was built up possibly & using aftermarket axles?

[REDROCKER652002]

Stupid question, but can't you just drill out the holes a little to make them fit?

[SCOTI]

Originally Posted by REDROCKER652002

Stupid question, but can't you just drill out the holes a little to make them fit?

Sure he could. But, he shouldn't have to do that & if the truck ever passes on to someone else, it's a hassle for them come service time.

I'm just trying to help him figure out if they simply put new metric studs in place instead of SAE or if something was changed.

[Tony71c10]

Originally Posted by SCOTI

Sure he could. But, he shouldn't have to do that & if the truck ever passes on to someone else, it's a hassle for them come service time.

I'm just trying to help him figure out if they simply put new metric studs in place instead of SAE or if something was changed.

I just hate buying new things and having to modify them to fit. Afraid they'll get damage while adapting them. I tried looking up the part# BD88190 but can't find any matches

[REDROCKER652002]

Originally Posted by SCOTI

Sure he could. But, he shouldn't have to do that & if the truck ever passes on to someone else, it's a hassle for them come service time.

I'm just trying to help him figure out if they simply put new metric studs in place instead of SAE or if something was changed.

You are quite right, and I meant no disrespect. Just got done trying to put front brakes on my son's not knowing the old owner had put 72 rotors, calipers and bearings on it. So, I completely understand. Sorry if my post was a bit snarky.

[SCOTI]

Originally Posted by REDROCKER652002

You are quite right, and I meant no disrespect. Just got done trying to put front brakes on my son's not knowing the old owner had put 72 rotors, calipers and bearings on it. So, I completely understand. Sorry if my post was a bit snarky.

It was not taken that way so all is good for me.

[Rich84]

A lot can change on these trucks as they get passed on.
I had an 88 and up posi (30spline) fall in my lap. So I had to get axles to match, which came with metric studs. I also had to get a deeper drum because they were about 5/16 longer (Buick Roadmaster).