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Allison 1000 Chevrolet/GMC Duramax Transmissions for Sale

The Allison 1000 automatic transmissions was built in 5 & 6 speed variations, the latter introduced in 2005. Allison 1000 transmissions are built with a strong structure and a are very popular transmissions amongst Chevy and GMC diesel truck owners. 6th gear is only found on 2006- to present Allison 1000 transmissions. 2001-2005 Allison equipped [...]