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[GMCnet] Converting OEM Rear Brakes to 3" Wide Shoes [message #60493] Sat, 17 October 2009 23:16 Go to previous message
fbhtxak is currently offline  fbhtxak   United States
Messages: 191
Registered: April 2006
Karma:
Senior Member
For Ken Henderson and others who responded to my inquiry -

I went to Gene Fisher's site before posting but missed Dave Mumert's
excellent analysis. My objective is to reduce brake fade. He listed that as
an advantage for the wider shoes.

I descend steep mountain grades "out west" in such a way as to minimize
brake fade under ordinary circumstances. I, however, have long been
concerned about the risk of fade under emergency circumstances before I
could get the vehicle safely stopped. With very light traffic while
descending Raton Pass south on I 25 a few days ago, I tested the brakes for
fade under 'panic stop" conditions from about 55 mph. Deceleration was
acceptable until about 35 mph but the rate of deceleration slowed
considerably after that due to rear brake fade (I purposely avoided lockup
upon initial brake application). It then occurred to me that the larger
surface area of the wider shoes would at least delay brake fade on steep
mountain grades under "panic stop" conditions - and maybe enough to safely
stop the vehicle.

Other than the mountain grade situation described, I find the OEM brakes
otherwise adequate for the way I operate the vehicle.

Fred Hudspeth
'78 Royale - Tyler, TX
'82 Airstream Excella 28'Motorhome, Anchorage, AK



Date: Sat, 17 Oct 2009 19:38:06 -0400
From: Ken Henderson <ken0henderson@gmail.com>
Subject: Re: [GMCnet] Converting OEM Rear Brakes to 3" Wide Shoes
To: gmclist@temp.gmcnet.org
Message-ID: <4ADA555E.6020900@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Fred,

I think John Evans has wider brake shoes available, but I don't think
they're as wide a 3".

Before committing to such a mod, one should read Dave Mumert's notes at

http://www.gmcmotorhomeinfo.com/brakes.html#calc

Ken H.

Fred Hudspeth wrote:
>
>
> Does anyone have a source for a kit to convert OEM rear brakes to 3" wide
> shoes? ...
> Fred Hudspeth
>



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