Rear Drum Brake Cylinders 13/16"

[Zedman]

Just wanting to put it out there that it might be prudent to put some demand on our suppliers.   I have recently been on a hunt for replacement cylinders for the rear drum brakes if my 1981 Avanti II.   On researching, it appears that 13/16" cylinders to suit are starting to have the dreaded "Discontinued line" and  "Low Stock" attached to various suppliers like Jegs, Summit etc.  I have ordered Ford Mustang 1968 V8 cyls (13/16" bore) from a mustang specialist here in Australia and will be trying these for fit- they are ostenibly correct, but ya never know.

This site has a lot of good info on interchangeability just in case others might want the info....

https://www.dormanproducts.com/p-15271-w37782.aspx?origin=keyword

 

 

 

Edited October 23 by Zedman

[billsr2]

Repopps were available but I chose to have mine sleeved.

Cheaper & original

[Zedman]

On 11/13/2024 at 12:28 PM, billsr2 said:

Repopps were available but I chose to have mine sleeved.

Cheaper & original

Hi Bill- I share your sentiments !  Unfortunately re-sleeving here in Oz seems to have become a limited business... not many shops do this work and often "charge like wounded bulls".  One mob in South Australia (they do most of the work for various shops) quote a three week turn around and freight on top plus kickbacks were well into three hundred bucks for the pair.  )  I did get a quote back from on e fellow in a regional area that said he couldn't do 'em because sleeving material in that size wasn't available (either that or he had nil stock). He did mention that he'd do other cyls for $80 (Australian), which is pretty reasonable.  However- The mustang Cylinders are IDENTICAL Dorman products and were postage paid from Sydney to Melbourne overnight for barely a hundred bucks all in- i.e. an obvious choice.  I gotta stress, though, that we get absolutely fleeced for car parts here in Oz-  Stateside prices are cheep !

[mfg]

Off topic……...Hi Zedman! … if you happen to know Brian Grenall from Victoria, please  tell him  ‘mfg’….(Ed) said hello…. Thanks!

[Zedman]

On 11/16/2024 at 1:03 AM, mfg said:

Off topic……...Hi Zedman! … if you happen to know Brian Grenall from Victoria, please  tell him  ‘mfg’….(Ed) said hello…. Thanks!

Will do !

 

[mfg]

14 hours ago, Zedman said:

Will do !

 

Thanks much! … Brian’s auto restoration abilities has always very much impressed me!

 

Edited November 29 by mfg
Added text

[billsr2]

Zed, have you found a solution? Perhaps I could buy a pair of sleeves here and sent therm? Couldn't cost much to ship and someone on that side of the planet should be able to manage them??

[Zedman]

On 12/7/2024 at 1:54 PM, billsr2 said:

Zed, have you found a solution? Perhaps I could buy a pair of sleeves here and sent therm? Couldn't cost much to ship and someone on that side of the planet should be able to manage them??

Yep solved it- thanks for the offer Bill; waaay cheaper to replace the cyls with the units the Mustang parts sellers have..

[John D]

since rear Avanti brakes are so similar to the e series rear truck brakes, I'm wondering if those 13/16 Mustang cylinders might be useful on the trucks. iirc the truck rear cylinders are 7/8" and are also becoming unobtanium. Being slightly undersized in back would probably work great on an empty 1/2 ton truck. I adapted easy-to-find 1" truck front cylinders to my 4E7 rears but am running 12" Turner discs up front and a Turner dual mc setup with a proportioning valve, so I can get away with the larger size. 

[Zedman]

On 12/9/2024 at 5:35 AM, John D said:

since rear Avanti brakes are so similar to the e series rear truck brakes, I'm wondering if those 13/16 Mustang cylinders might be useful on the trucks. iirc the truck rear cylinders are 7/8" and are also becoming unobtanium. Being slightly undersized in back would probably work great on an empty 1/2 ton truck. I adapted easy-to-find 1" truck front cylinders to my 4E7 rears but am running 12" Turner discs up front and a Turner dual mc setup with a proportioning valve, so I can get away with the larger size. 

There is a lot of meat in the 13/16" bores- It struck me that they could be drilled & reamed out to 7/8" and a new kit of parts put in...?