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Message: [QUOTE="madman1234509, post: 651733, member: 3910"] My friend who does all the work/ fabrication on my truck has a 900hp cummins. He was always plauged with wicked high rpm at highway speed because of the 4 speed tranny that is in it. He installed a gear vendors, set it up so it locks via a switch in the cab, and had a custom drive shaft made with the beefiest parts possible. He installed it and we made out 600 mile journey down to rudys last fall right after. It was flawless, he absolutesly loves it and hasnt had a single hiccup with it, even with big power. [/QUOTE]

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