Finned vs Smooth drums

dubbsix · Nov 12, 2006

Is there any issues with using the Finned rear drum instead of the smooth rear drum normally found on the autos?

I have an auto 89 LX, but i havent been able to find the smooth rear drum.. only the finned drum thats suposedly for the manual cars.

Any help guys?

Mustang5L5 · Nov 12, 2006

None, if anything i would assume the finned versions would cool better.

I ran the finned ones on my AOD car...back when i had drums

dubbsix · Nov 12, 2006

Awesome. I thought the finned drums would provide better cooling too. Thanks!

iwashmycar · Nov 12, 2006

i used to have smooth, but the 5-lug ones are finned

HISSIN50 · Nov 12, 2006

What's the thinking with the smooth-for-autos vs finned-for-manuals? I'd expect an auto (for as little as rears are used) to generate more heat (due to increased braking) since the car wants to keep driving forward while slowing.

What's the scoop?

Mustang5L5 · Nov 12, 2006

That's a good question and I can't see a real reason why two different drums were used for each transmission

iwashmycar · Nov 12, 2006

i have, and always have had, a stick, with smooth drums...

dubbsix · Nov 12, 2006

Wow.. Well i thought ford just wanted to make our lives interesting

Good thing i can use the finned ones. Everyone else in CA wants about 60 bucks each for the smooth one.

Roland69 · Nov 12, 2006

I didn't even know there was a difference in manual vs auto drums

MustangLX-5.0 · Nov 13, 2006

Speaking of drums...are there any high performance alternatives to standard drums? Aside of the costly disc brake conversion...maybe better quality drums/brake shoes? Is there anyplace that sells ceramic shoes?

Maryland Stang · Nov 13, 2006

MustangLX-5.0 said:
Speaking of drums...are there any high performance alternatives to standard drums? Aside of the costly disc brake conversion...maybe better quality drums/brake shoes? Is there anyplace that sells ceramic shoes?

Maximum Motorsports (www.maximummotorsports.com) makes a brake upgrade kit for Foxes. It includes SS brake hoses, Hawk front pads, MM high performance shoes and SS front caliper sleeves. You can find it in the brake upgrades department.

iwashmycar · Nov 13, 2006

dubbsix said:
Wow.. Well i thought ford just wanted to make our lives interesting

Good thing i can use the finned ones. Everyone else in CA wants about 60 bucks each for the smooth one.

wow...maybe i should sell the smooth ones since they are 4-lug, and in good cond.... If they have that sort of value

ALMOSTFINISHED · Nov 13, 2006

Mine are finned on my 88 5speed...
Maybe it had something to do with mass production and other vehicles using the same size drums from the factory. And whatever was available at the time of the vehicle being built it was that that was put on.?

Nick

wythors · Nov 13, 2006

My car had finned rear drums stock.

Mustang5L5 · Nov 13, 2006

'79 Mustangs came with Aluminum drums with steel liners. Good luck finding a pair of those. I'd sandblast em down and put them on the shelf next to my other antiques

Hoestly, i don't know what upgrades there are for rear drums Brakes. I *think* you can upgrade the 9" rear drums to the 10" drums found on rangers with 8.8" rears. I am not sure though. My extent of drum brake knowledge was taking my factory drums off, and tossing them in the trash when i installed rear disks

Finned vs Smooth drums

dubbsix

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Mustang5L5

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dubbsix

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HISSIN50

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