| [GMCnet] One Ton Conversion [message #177271] |
Thu, 19 July 2012 10:16 |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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As Jim correctly points out, the components are largely stock Toro, but the implementation is far from Toro. Look at the caster angle spec for the MH, for example - started at 3 degrees positive and was reduced to 2 degrees by the 75 manual probably because they found excessive wear on the steering gear and they never changed the spec for the change to radial ply tires. The Toro is a whole different story - started out at NEG. caster to make it easy to turn in a parking lot and increased it to positive with the change to radial ply tires and a lighter vehicle. The MH is its own special creature that was built from the parts bin.......where possible. That is why it is so important to buy parts from GMC MH specialists who know from experience what does and does not work correctly in the MH application. The OTC guy at a parts store has only a part number book to go by and the part numbers (as well as the parts themselves) have changed a bunch in the intervening years.
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: 6
Date: Wed, 18 Jul 2012 13:17:39 -0700
From: James Hupy <jamesh1296@gmail.com>
Subject: Re: [GMCnet] One Ton Conversion
To: gmclist@temp.gmcnet.org
Message-ID:
<CALxoeytxifp+AWCTqFK3maF+-=ihRPU08xCx+MRW2RgzuQWJDA@mail.gmail.com>
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Kerry, when the GMC was first shown to the public, it had 5 bolt wheels,
same as the Toronado. Further proving ground testing show the weakness of
the wheels. They constructed a GMC specific 8 lug hub that had the same
bearings as the Toronado, along with the upper and lower control arms. The
inboard and outboard Constant Velocity joints are the same as Toronado, but
the axle shafts are not, they are too short. The axles are specific to the
GMC. Where the control arms are located on the front clip of the GMC is
quite different than the cars as well. Over subsequent years production,
the control arms were modified to strengthen them, and later GMC produced
upgraded control arms. Steve Ferguson modifies/upgrades/repairs Original
control arms so thay are as strong as they can be. As much as possible, GM
used off the shelf pieces to produce the Motorhomes.
The transmission and final drive are very similar to the cars but Manny T
can explain the differences internal to the transmissions used in the
Motorhomes.
Jim Hupy
Salem, OR
78 GMC Royale 403
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Jerry & Sharon Work
78 Royale
Kerby, OR
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