Wrong part or new design?
Thread Starter
|
Cargo Master
Joined: Jun 2015
Posts: 2,240
Likes: 23
Wrong part or new design?
Is this how drums are made now? This drum doesn't even go over the backing plate nor does it come close. It leaves a gap between drum and backing plate. My old one went over the backing plate like a lid.
Thread Starter
|
Cargo Master
Joined: Jun 2015
Posts: 2,240
Likes: 23
Originally Posted by Tedster9
It is when they are el-cheapo imported foreign fhit. Where did you get those?
Originally Posted by John89
Assuming your new drum is flush with the axle flange, I would say you have the wrong drum. It should go all the way over.
My dana44 has 44-6C stamped on it and the back of the knuckle has 12bolts which points me to the 6CF-HD 3500 axle.
It's seated fully as the screws are in on that picture. Here's how my old drum looked
Thread Starter
|
Cargo Master
Joined: Jun 2015
Posts: 2,240
Likes: 23
I just am concerned as it seems like road debri can get in easily like that. I thought they always covered the backing plate.
If anyone has a website for drums I'd love to get the link.
Rockauto is also saying they will only refund me if the part has zero scratches and I'm out shipping both ways.
In my opinion they sent the wrong part (which had scratches from the start so I'm SOL on that) and should refund my money plus shipping both ways. First bad experience with rockauto but it may be my last. I don't like be out $120
If anyone has a website for drums I'd love to get the link.
Rockauto is also saying they will only refund me if the part has zero scratches and I'm out shipping both ways.
In my opinion they sent the wrong part (which had scratches from the start so I'm SOL on that) and should refund my money plus shipping both ways. First bad experience with rockauto but it may be my last. I don't like be out $120
Lead Driver
Joined: Jul 2017
Posts: 9,580
Likes: 1,162
From: San Jose, CA
You're right to question it. In my opinion it's not correct for all the reasons you cite.
However, as for it being the "wrong part" all the way, I'm wondering about the inner layer there that looks like it is extending into the backing plate lip? Am I seeing that correctly, and the new drum's inner portion/sleeve/bit is actually extending past the outer seal lip? If so, I'd say that's your answer. It's the manufacturer's version of the "new and improved" model. Insert rolling eyes face here...
When looking at the pics all the other dimensions look pretty similar. Are the outer surface and the lip the same dimensions as your old ones? What do they look like when sitting on the ground next to each other?
Paul
However, as for it being the "wrong part" all the way, I'm wondering about the inner layer there that looks like it is extending into the backing plate lip? Am I seeing that correctly, and the new drum's inner portion/sleeve/bit is actually extending past the outer seal lip? If so, I'd say that's your answer. It's the manufacturer's version of the "new and improved" model. Insert rolling eyes face here...
When looking at the pics all the other dimensions look pretty similar. Are the outer surface and the lip the same dimensions as your old ones? What do they look like when sitting on the ground next to each other?
Paul
Lead Driver
Joined: Jul 2017
Posts: 9,580
Likes: 1,162
From: San Jose, CA
Forgot to mention that, in the short-term at least, if that inner liner surface that the shoes ride on is fully encompassing the shoes and is fully inserted into the backing plate area, then they're "safe" to use in a pinch. Not that you'd want to, because then they'd really be hard to return, but in case you decided that you had to use them.
By short-term though, I mean I don't know how well an unsupported area of drum liner will fare compared to the other portion. Will it cool at the same rate? Doubt it. Will it crack at the point it exits the drum casting? Possibly. Will it flex more under hard pressure from the brakes? Very likely.
But by how much any of those things happen, or if at all, is the 64-thousand dollar question today.
Paul
By short-term though, I mean I don't know how well an unsupported area of drum liner will fare compared to the other portion. Will it cool at the same rate? Doubt it. Will it crack at the point it exits the drum casting? Possibly. Will it flex more under hard pressure from the brakes? Very likely.
But by how much any of those things happen, or if at all, is the 64-thousand dollar question today.
Paul
Trending Topics
Senior User
Joined: Dec 2009
Posts: 176
Likes: 1
From: Spring Hill
As for rock auto i will not do business with them again. Got a blower motor last year and it was good. Tried them again, epic fail. I ordered both upper and lower control arms for my dodge with bushings and ball joints installed. One lower arm had a crushed grease fitting, no biggie i fixed it. But the uppers have different ball joints, one is servicable with a castle nut and cotter pin, the other is non servicable with a polylock nut. I was not pleased. Said something to em and they said they were equivelant. I asked for someone else and stated i wasnt comfortable with a poly lock nut on a ball joint. Still nothing other than return it. All i wanted was a matching serviceable ball joint.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Cargo Master
Joined: Jun 2015
Posts: 2,240
Likes: 23
Well the Napa guys and the one autozone manager I trust who is knowledgeable, both said it's just the new and "improved" design. One of the only reasons they said they've been given was it cuts down on drum and backing plate issues. .... idk by the looks it doesn't look improved but I guess it's just what I have to go with now.
Cargo Master
Joined: May 2011
Posts: 2,387
Likes: 138
From: Northern California
I’d say research the parts before purchasing... As a general rule I avoid the cheap stuff and go with premium brands only. At rockauto the good stuff is usually cheaper than the garbage store brands at the local crap store. Same with amazon and the rest of the internet...
These are raybestos premium for a 9”... yes Chinese but the proper casting.
Lead Driver
Joined: Jul 2017
Posts: 9,580
Likes: 1,162
From: San Jose, CA
Looks better!
I'd say "new and improved" is the typical double-speak for cheaper to produce.
Maybe even fits a second batch of brake systems simply by trimming off the inner surface that sticks out and gives them a whole new application without having to make a new casting. Although that's probably stretching the imagination a bit, since machining one angle probably costs more to do than casting an entirely different unit to begin with.
Glad you got it figured out. Is the last pic one you bought locally after talking to the guys and seeing what they had to offer?
Paul
I'd say "new and improved" is the typical double-speak for cheaper to produce.
Maybe even fits a second batch of brake systems simply by trimming off the inner surface that sticks out and gives them a whole new application without having to make a new casting. Although that's probably stretching the imagination a bit, since machining one angle probably costs more to do than casting an entirely different unit to begin with.
Glad you got it figured out. Is the last pic one you bought locally after talking to the guys and seeing what they had to offer?
Paul
Thread Starter
|
Cargo Master
Joined: Jun 2015
Posts: 2,240
Likes: 23
Originally Posted by crazy96863
I’d say research the parts before purchasing... As a general rule I avoid the cheap stuff and go with premium brands only. At rockauto the good stuff is usually cheaper than the garbage store brands at the local crap store. Same with amazon and the rest of the internet...
These are raybestos premium for a 9”... yes Chinese but the proper casting.
I'm not paying 3x the price and today when I spoke with the Napa guys they confirmed their product is the same way so it would've been wasted money.
Raybestos doesn't have my brake drums.
If anyone knows where to get drums for a 1974 DANA44-CFHD (FRONT axle) id appreciate it. (The CFHD is the 3500# axle) although it sounds like this is just what I'll get anyway. I have a local shop that deals with olds trucks I'm going to talk to on Monday before I officially throw these drums on.
Thread Starter
|
Cargo Master
Joined: Jun 2015
Posts: 2,240
Likes: 23
Originally Posted by 1TonBasecamp
Looks better!
I'd say "new and improved" is the typical double-speak for cheaper to produce.
Maybe even fits a second batch of brake systems simply by trimming off the inner surface that sticks out and gives them a whole new application without having to make a new casting. Although that's probably stretching the imagination a bit, since machining one angle probably costs more to do than casting an entirely different unit to begin with.
Glad you got it figured out. Is the last pic one you bought locally after talking to the guys and seeing what they had to offer?
Paul
I'd say "new and improved" is the typical double-speak for cheaper to produce.
Maybe even fits a second batch of brake systems simply by trimming off the inner surface that sticks out and gives them a whole new application without having to make a new casting. Although that's probably stretching the imagination a bit, since machining one angle probably costs more to do than casting an entirely different unit to begin with.
Glad you got it figured out. Is the last pic one you bought locally after talking to the guys and seeing what they had to offer?
Paul
Yeah it's just that outer rim is trimmed down by half. You may not be so far off base as the drums are drilled for multiple bolt patterns. I have the 8 lug holes, 2 screw holes and then 3 holes left over so I think they are just double dipping... which annoys me lol
Thread Starter
|
Cargo Master
Joined: Jun 2015
Posts: 2,240
Likes: 23
Here's some more pics for future reference.
Also I couldn't tell on my old drum which place to measure as it looks like the drums have been worn down quite a bit (I'm past the safe diameter anyway) so I measured on the wear mark and where it looks even on the new piece. It lines up with the 2" shoe so I think it's just severely worn down.
Edit* the one pic also shows the extra holes that kinda prove they are selling it for multiple vehicles
Also I couldn't tell on my old drum which place to measure as it looks like the drums have been worn down quite a bit (I'm past the safe diameter anyway) so I measured on the wear mark and where it looks even on the new piece. It lines up with the 2" shoe so I think it's just severely worn down.
Edit* the one pic also shows the extra holes that kinda prove they are selling it for multiple vehicles
