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Old 18-01-15, 14:16
Grant Bowker Grant Bowker is online now
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Join Date: Jul 2006
Location: Ottawa, Canada
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The spring suspension sytem was not originally fitted to cab 13 vehicles. There is a service bulletin for retrofitting the spring system.
My guess is that it would have been most used on vehicles expected to be used extensively oofroad and subject to frame twisting.
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