confusing drum brake issue
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Senior User
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From: Dillon, Colorado
confusing drum brake issue
I have a 1973 f250, 4wd, with a 360. The problem is I have a bad shimmy coming from the front end when I brake. This only showed up after I swapped wheels from an aluminum set, to a steel set (I drove the vehicle the wheels were on before, and know they are good).
When I jacked up the front end, the passenger front wheel (the wheel that seemed to produce the most shaking) seemed to have a bad or warped drum. when I spun it, It had a defenite "inconsistant rubbing", that would make sense right?
But when I got a new drum from the local napa, it turned out to also rub when I spun it. The real problem was they gave me the wrong drum because it hit the backing plate. It was too deep. Upon further investigation, napa dosent seem to have anything that will fit, because the one I had was for the lighter duty 2" wide brake pad, and not the heavy duty 2 1/2" wide brake pad. I apparently definatly had the right one for the job.?
My question is, should I continue to seek out new drums, or does the fact that it still seemed to rub oddly when spun, with the new drum, indicate that maybe it's not the drum, but something else. ??????? help
thanks alot,
Brad
When I jacked up the front end, the passenger front wheel (the wheel that seemed to produce the most shaking) seemed to have a bad or warped drum. when I spun it, It had a defenite "inconsistant rubbing", that would make sense right?
But when I got a new drum from the local napa, it turned out to also rub when I spun it. The real problem was they gave me the wrong drum because it hit the backing plate. It was too deep. Upon further investigation, napa dosent seem to have anything that will fit, because the one I had was for the lighter duty 2" wide brake pad, and not the heavy duty 2 1/2" wide brake pad. I apparently definatly had the right one for the job.?
My question is, should I continue to seek out new drums, or does the fact that it still seemed to rub oddly when spun, with the new drum, indicate that maybe it's not the drum, but something else. ??????? help
thanks alot,
Brad
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Original wheels were OK, no shimmy.
No problem with the donor vehicle's wheels when you drove it. The front wheels had no shimmy, but what about the rear wheels?
Did you put one of the donor wheels that was on the back of the donor to the front of this vehicle? If you did, that rear wheel which is now on the front could be bent.
1973 F250 4WD Front brake drum sizes: 11 x 2 OR 12 1/8" x 2"
No problem with the donor vehicle's wheels when you drove it. The front wheels had no shimmy, but what about the rear wheels?
Did you put one of the donor wheels that was on the back of the donor to the front of this vehicle? If you did, that rear wheel which is now on the front could be bent.
1973 F250 4WD Front brake drum sizes: 11 x 2 OR 12 1/8" x 2"
Last edited by NumberDummy; Apr 24, 2007 at 12:22 PM.
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Originally Posted by NumberDummy
Original wheels were OK, no shimmy.
No problem with the donor vehicle's wheels when you drove it. The front wheels had no shimmy, but what about the rear wheels?
Did you put one of the donor wheels that was on the back of the donor to the front of this vehicle? If you did, that rear wheel which is now on the front could be bent.
1973 F250 4WD Front brake drum sizes: 11 x 2 OR 12 1/8" x 2"
No problem with the donor vehicle's wheels when you drove it. The front wheels had no shimmy, but what about the rear wheels?
Did you put one of the donor wheels that was on the back of the donor to the front of this vehicle? If you did, that rear wheel which is now on the front could be bent.
1973 F250 4WD Front brake drum sizes: 11 x 2 OR 12 1/8" x 2"
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
The problem arose after he switched wheels, so the backing plate shouldn't be a problem, and I don't know how one could adjust the wheel bearings. The problem lies with one of those steel wheels. Take the truck to a QUALITY brake shop, better if it's been around for a while. Older brake shops used to have wheel straighteners...and there is your problem, an out of round rear wheel that ended up on the front. A rear wheel that is out of round is tough to isolate till it's rotated to the front.
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There are different depth drums available for these trucks
There are several Online parts house that have application charts for looking up parts
application per vehicle.
FTE users should be aware they can look these parts up themselves before they go to any parts counter.
Try matching your drum part number to one on here.
www.rockauto.com
There are several Online parts house that have application charts for looking up parts
application per vehicle.
FTE users should be aware they can look these parts up themselves before they go to any parts counter.
Try matching your drum part number to one on here.
www.rockauto.com
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