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Old 05-16-2014, 09:43 PM   #5
SS Tim
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Join Date: Aug 2010
Location: Edwards, CA
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Re: Identifying transmission

Its generally known even in the parts catalogs as a truck three-speed Saginaw, used behind 250, 292 and 307 engines, you might find it on a build sheet as code ZW4. 350 and 400 C10s and all K10s used a HD version with slghtly different gear ratios
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