Brake drums

[massillon preacher]

Have others experienced this. I have what I measured 11 1/32 x 3" drums on my 71 F100, I have been looking at getting new drums at lmc, npd, macs, autozone, summit racing and some others and some say 3" and some 2 1/4", why do they show different sizes like that even though I put in all the same info for my truck?

[TNIceWolf]

What I found out when i purchased the brake shoes for mine at auto zone is that there were two widths available for my vehicle using the same info for my truck. You would think a one ton dually would be just one but thats not so. Apparently there is a regular duty.....the narrower width....and a heavy duty....the wider one. If you go to the counter to purchase shoes they ask which width you have......if you have a good clerk. Their website wont show that sometimes especially for an older vehicle. It seems to me that the online sites dont cover every aspect of parts.( But they probably do carry the part you are looking for ). It takes talking to a knowledgable staff member sometimes to get the right answers when you run up on that.

[colnago]

Another thing you could to is to order a "Marti Report."

https://www.martiauto.com/martireports.cfm

Basically, you provide the VIN, and he can see what options your truck left the factory with. Maybe this will be able to identify your brake option, and you can use that info for ordering your parts. I think my Marti Report cost about $20. It won't tell you what the dealer did, or any mods over its lifetime, but it's a starting point.

Joseph