'69 brake drum change?

[akafrankcastle]

Parts guy asked me last night whether my '69 had a production number of before 30001 or after. Price difference was about 50% and there was a different part number as well. Any ideas?

I'm thinking the difference might be in whether or not the drum has a hub attached to it or not. My '66 actually had one drum that could be removed without removing the entire hub assembly, and one that required the entire thing be removed.

 

[Explorer]

They all were attached to hub. Someone "modified" the one that came off easily. Different shoe and drum sizes account for diff part numbers.

 

[akafrankcastle]

Didn't even think about the drum diameter piece. Thanks.

Now I'm wondering why a drum of a different size would be twice the price.

 

[shamu]

Didn't even think about the drum diameter piece. Thanks.

Now I'm wondering why a drum of a different size would be twice the price.

I was looking on the net for drums and the difference is cast versus something.

 

[broncnaz]

I'm pretty sure all front drums will come off the hub they just tend to be a very tight fit. All front drums for broncos are the same size from 66-75. Here's what I've found there is a slight differance in drum sufrace depth and drum height. its a fairly small differance and probably wouldnt make a big differance but I would get the correct one and price differance is minimal at NAPA I think its about $39 vs $43. Your parts guy could be pricing one with a hub and one just a drum.
here's the specs NAPA gives for the drums.
Up to production # 30,000
# of Bolt Holes : 5
Bolt Circle Diameter : 139.7 mm
Brake Drum Surface Depth : 61.5 mm
Center Bore Diameter : 90.6 mm
Height : 77.9 mm
Inside Diameter : 279.4 mm
Maximum Discard Diameter : 280.92 mm
O.D. : 318 mm
after 30,000
# of Bolt Holes : 5
Bolt Circle Diameter : 139.7 mm
Brake Drum Surface Depth : 60 mm
Center Bore Diameter : 90.6 mm
Height : 78.4 mm
Inside Diameter : 279.4 mm
Maximum Discard Diameter : 281.67 mm
O.D. : 325 mm

 

[akafrankcastle]

Weird.

Well, my parts guy is some schmuck behind the counter at AZ, so I doubt he really has as much interest in insuring I receive the correct part as he does make a quota of transactions for the evening so he doesn't wind up laid off.

Damn good stuff to know. We'll see what shows up tomorrow I suppose.

 

[DirtDonk]

Wheel bearing seals changed at that number.

Paul

 

[myclsic69]

When I had my 69 torn apart, I removed both front drums off of the hub with a press ,cleaned up all mounting areas,and re-installed new drums right back over the hub like you would for the rear drums. The fronts are very tight if the drums are original. But will come off . My parts guy quoted me 2 prices, 1 w/ drum and hub and 1 just drum. Hope this helps.