08-12-2016, 04:00 PM
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Senior Moderator
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Join Date: Jun 2009
Location: Georgia
Posts: 5,298
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I use Shell Rotella T 15W-40 in my Duramax and my Cub transmissions. 
https://www.walmart.com/ip/Shell-Rot...-gal./14958327
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This ain't no hobby....it's an addiction
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