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Problem finding Wheel Cylinders for 11" Brake Drums #2945218
07/20/21 02:58 PM
07/20/21 02:58 PM
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Texas
Texican Offline OP
mopar
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Does anyone have a part number for Wheel Cylinders on 11" Brake Drums ?

I have a 69 Superbee (A12) that has 11x3 drums from and back.

All is good except for wheel cylinders, I can only find cylinders for 10" drums.

Any help is appreciated.

Last edited by Texican; 07/20/21 04:22 PM.
Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: Texican] #2945266
07/20/21 05:09 PM
07/20/21 05:09 PM
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New Port Richey, Florida
Wolfe440 Offline
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Been a couple of years but to what I remember I used these if your bore is 15/16. May want to call them and confirm its for rear drum if you also have drum front.

https://www.yearone.com/Product/chrysler-b-body/bg502

Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: Wolfe440] #2945272
07/20/21 05:32 PM
07/20/21 05:32 PM
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Attached PDF document
wc.pdf (19 downloads)
Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: Wolfe440] #2945274
07/20/21 05:34 PM
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Last edited by SNK-EYZ; 07/20/21 05:38 PM.

Kayse can't keep up at all now. lol
Drums / Wheel Cylinders for 11" Hemi Brake Drums [Re: Texican] #2945327
07/20/21 07:52 PM
07/20/21 07:52 PM
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The front and rear wheel cylinders have different bore, therefore different part numbers.
Here's what I found:

My application: B-Body 1969 A12 Superbee with HD suspension package (11"x3" Drum Brakes Front & Rear - Factory)

Front Wheel Cylinders (Orielly Part #): WC40416 These have a 1-1/8" Bore
Rear Wheel Cylinders (Orielly Part #): WC78734 These have a 15/16" Bore

Front Drums: Bendix PDR0019. 11"x3". (Found New on Ebay)
Title: ==> Brake Drum-HEMI Front Bendix PDR0019


Rear Drums: (Found New on Ebay)

1965-1970 Chrysler with Heavy Duty / Police / Taxi 11 x 3 inch rear brakes

1965-1970 Dodge Fullsize Cars with Heavy Duty / Police / Taxi 11 x 3 inch rear brakes

1965-1970 Plymouth Fullsize Cars with Heavy Duty / Police / Taxi 11 x 3 inch rear brakes

Part #: BD 2923

Drum Inside Diameter: 11 inches

Fits Shoe Widths Of: 3 inches

Bolt Pattern: 5 x 4 1/2"

Re: Drums / Wheel Cylinders for 11" Hemi Brake Drums [Re: Texican] #2945337
07/20/21 08:05 PM
07/20/21 08:05 PM
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mopars4ever pointed out something I didn't know

The 10 and 11 inch drums use the same wheel cylinders.

Obviously the Front and rear are different sizes, and each front cylinder is left or right, but the cylinders are the same for both 11 and 10 inch systems.

Interestingly cool information. up

Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: Texican] #2945438
07/21/21 12:46 AM
07/21/21 12:46 AM
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Polson, MT
DoctorDiff Offline
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You should have 11 x 3" front drums and 11 x 2 1/2" rear drums.

Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: DoctorDiff] #2945518
07/21/21 10:44 AM
07/21/21 10:44 AM
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Ordered the ones for my 65 from Rock auto.I have 69 RT rear.try looking them up for that.Mine were ordered like last year.Rocky


Chrysler Firepower
Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: therocks] #2945573
07/21/21 12:34 PM
07/21/21 12:34 PM
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roadrunninMark Offline
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I may have a pair of NOS from the 80s in my spare parts pile. I had 4 wheel drums on the RR before switching to all disc. These would be not be mopar but something you got over the counter. If you are interested let me know and I’ll look for them.

Last edited by roadrunninMark; 07/21/21 12:35 PM.
Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: roadrunninMark] #2945590
07/21/21 12:57 PM
07/21/21 12:57 PM
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Transman Offline
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If attaching size is important to you be aware that from Rock auto some of the wheel cylinders have smaller attaching bolts.

I

Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: Transman] #2945693
07/21/21 04:32 PM
07/21/21 04:32 PM
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Salem, NY
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69gtxvert Offline
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This is exactly what I ran into.....the new ones I bought from RockAuto were 3/8" bolt heads, the originals were bigger (probably 1/2" but I couldn't find the old ones quickly). Still debating whether to go ahead and use the smaller attaching bolts or roll the dice and buy different ones from a different retailer.

Re: Problem finding Wheel Cylinders for 11" Brake Drums [Re: 69gtxvert] #2945697
07/21/21 04:36 PM
07/21/21 04:36 PM
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Michigan
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Transman Offline
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I found out after I had both backing plate assemblies built on the car.
I saved the old cylinders, when I have time I will restore them and re-install them. You may want to consider rebuilding yours.

Besides that, they were fine.







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