I replaced the rear drums, shoes(linings), and hardware on my 2001 Windstar with 130 K miles.

Now when ever you apply the brakes you hear a thumping sound that is speed dependent.

The faster the speed the faster the thumping. If you gently apply the brakes you don't hear the thumping at all.

Could this be a problem with the ABS sensor, bad bearing, or a bad drum ?

Any suggetions ?

Did you buy an economy drum, or a brand name? Economy drums are often out-of-round and have to be machined right out of the box.

I measured the drum runout with an idicator and the TIR is .005 - .006.

Is this enough to cause a problem?

I bought the drums at Carquest for about $40.00 each. Probabally an economy version. How can they be this far out, right out of the box.

Thanks for your help.

I measured the drum runout with an idicator and the TIR is .005 - .006.

Is this enough to cause a problem?

I bought the drums at Carquest for about $40.00 each. Probabally an economy version. How can they be this far out, right out of the box.

Thanks for your help. If I would be a bad boy I would say that they have been manufactured in "China" :):):)

I think that they were made in China. :shakehead

Surely someone making .50 cents an hour, working with 3rd world machines can do as good a job as someone working in a modern US factory making $15 to $25 an hour.

I had a similar problem with "made in China" drums that I bought at Napa for about $50 each.
Only mine caused the vehicle to shake at any speed above 45mph.
I tried moving my tires around....thinking that I might have knocked a weight off......I tried having all 4 tires spin ballanced.....
Then, I put my old drums back on.....and the problem went away.
I took the drums back.....I wish that they had asked me if I wanted "economy" drums.......I would have said "NO".
Then I bought Bendix drums from Advance Auto...for about $80 each ..and they have been fine.

Not being in the business......I am not up on the prices.....and a quality drum is not that much more.
Again....it pays to shop on the internet before walking into a auto parts store.