| [GMCnet] 1974-1978 front frame comparison [message #183029] |
Mon, 03 September 2012 19:05  |
glwgmc
Messages: 1014
Registered: June 2004
Karma:
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Senior Member |
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Hi Les,
Thanks for posting these most interesting pictures. Perhaps these subtle changes help explain the different experiences we are hearing about as people install 1 ton front ends. The GMC manuals do not reflect any geometry differences year to year following the change from 3 degrees static caster in 73 lowered to 2 degrees in 75 and on, but while most people have installed the 1 ton with great results, a few have been fighting to get theirs to drive correctly. There is not much adjustment range in the upper A arm to effect camber and caster, but any change in where those brackets are located or where the adjustment slots are in relation to the ball joints could have a profound effect.
Jerry
Jerry Work
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
541-592-5360
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Message: 10
Date: Mon, 3 Sep 2012 16:01:02 -0400
From: Les Burt <gmc.les@gmail.com>
Subject: [GMCnet] 1974 - 1978 Front Frame Comparison
To: gmclist@temp.gmcnet.org
Message-ID:
<CAKDALh1MoT-QHYGpYkYXrZFihQm_8TxMdWk9kVAwyBCpsezfeA@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
I've annotated and uploaded the Front Frame comparison photos. you can find
them here:
http://www.gmcmhphotos.com/photos/g6170-1974-1978-front-frame-comparison.html
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Jerry & Sharon Work
78 Royale
Kerby, OR
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