Aluminum rear drums

[quikv6]

One of my rear drums has a crack and needs to be replaced. I need the aluminum drums for the tire clearance. I already have a wheel spacer and still only have 1/4" or less from the frame rail with the 295's.

Can these drums be easily found in the wrecking yard? Where else can these be purchesed? Thank you.

 

[Ken Cunningham]

I have found these drums at the wrecking yard, I think some of the F bodies also used them (Camaro, Firebird). Just take a drum with you or at least write down the part number that's cast into the drum. How easily you will find them depends on your auto yard. I have also bought a pair from the TR for sale ads here. I got a good deal and the alum. drums are not too expensive to mail either.

 

[325DR]

Originally posted by quikv6
One of my rear drums has a crack and needs to be replaced. I need the aluminum drums for the tire clearance.

The aluminum drums change the backspacing? Does it push the wheels out farther? How much of a difference do they make?

 

[quikv6]

Thanks Ken, I'll check the local yards and bring the old drum with me.

 

[quick85]

alum drums

i tnink bweavy has them. dont know how much. imho.

 

[chris]

Camero???

Ken,

What year cameros did these come on?

 

[UNGN]

The aluminum drums are about 3/32" thicker than cast iron ones so they space your tires away from the frame that much more.

 

[NastyGn]

Just for information here is a list of cars that came with the
alum. brake drums I have, I got this off the Gnttype list a few
years ago

83-84 Blazer/Jimmy S/T models
80-84 Buick LeSaber 85 RWD
78-81 Buick Century
78-87 Buick Regal
81-85 Buick Riviera
82-92 Chevy Camaro
86-89 Chev Full Size passenger cars
78-81 Chev Malibu
78-88 Chevy Monte Carlo
82-84 Chevy S10/S15
80-85 Olds Delta 88
78-82 Olds Cutlass
80-81 Pont Bonneville
83-85 Pont Bonneville
86 Pont Parisienne
82-92 Pont Firebird
78-85 Pont LeMans
78-88 GMC Sptint/El Camino

You must check the steel liner because the liner can not take
much rework. The drums are 9.50" outside by 2" width.

Take Care

 

[UNGN]

Neal is right.

Aluminum drums actually are a composite: Aluminum drums with a cast iron liner.

Even before they get to max diameter, the abuse a T-R can dish out during powerbraking can cause stress cracks in the liner.

I grenaded one of my swapmeet Al drums a few years back. You can't argue with the 12 pound weight savings, though, So I'm always looking for good ones when go shopping at the j-yard.

 

[quikv6]

Thanks for the info Neal. I was able to locate 2 drums from a camaro in good condition. Part number is 1255496 same as my original T drums.

 

[Two Lane]

What would be the desirable range for thickness-remaining?

TIA!

 

[UNGN]

Originally posted by Two Lane
What would be the desirable range for thickness-remaining?

TIA!

Since the one of mine that exploded was still .020 smaller than the max diameter cast into the drum, I definately would not use ones machined beyond the max oversize limit.

 

[Two Lane]

Whoa!!!!!!!

Thanks for the warning, UNGN!

 

[turbojoe]

there's a number missing from that part #. if you could post the entire # thanks