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04-02-2022, 05:21 PM
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#1 |
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Registered User
Join Date: Mar 2014
Location: Tacoma Wa
Posts: 146
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Wheel cylinder bolt oddity
Working on my 64 GMC 1000 1/2 ton, noticed something really weird, the bolt size that attaches the wheel cylinder to the spindle is different size left to right side. The driver's side the thread size is 3/4", the passenger side is 9/16". Anyone care to venture a guess why the different sizes? This is original because the upper ball joints have never been off the truck (riveted) so I know the spindles havent been changed through out its lifetime.
Things that make you go hmmm...... Steve
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1953 3100 261cu in, sm420, 3.55 torque tube, omaha orange 1964 GMC 1000 series,custom, 305E, sm420 Last edited by The Rocknrod; 04-03-2022 at 01:31 PM. |
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04-03-2022, 07:07 AM
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#2 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Wheel cylinder bolt oddity
Interesting . I've never heard that.
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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04-03-2022, 11:53 AM
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#3 |
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Who Changed This?
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,698
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Re: Wheel cylinder bolt oddity
That is odd. I expect that the wheel cylinder bores are the same diameter?
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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04-03-2022, 02:50 PM
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#4 |
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Registered User
Join Date: Oct 2012
Location: Philly, PA
Posts: 540
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Re: Wheel cylinder bolt oddity
If I'm reading this correctly, I'm going to say it's done because they're directional parts. So if you put one side on and then the other side won't cooperate, hopefully the ol' light bulb will turn on.
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My truck ain't dead, it just smells funny. |
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04-03-2022, 05:04 PM
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#5 | |
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Registered User
Join Date: Mar 2014
Location: Tacoma Wa
Posts: 146
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Re: Wheel cylinder bolt oddity
Quote:
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1953 3100 261cu in, sm420, 3.55 torque tube, omaha orange 1964 GMC 1000 series,custom, 305E, sm420 |
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04-03-2022, 05:05 PM
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#6 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,698
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Re: Wheel cylinder bolt oddity
Is the spindle beefier? Maybe we can reverse engineer it!
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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