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Discussion Starter · #1 ·
I just bought a 06 mega cab 4x4, and i am ready to start the usual upgrades. I have had a few 5.9 cummins but they have all been 6sp's, my concerns with the auto is how much can i do b4 i have to up grade it also.
Looking at Smarty programmer and K&N cold air to start..... any imput would help. Thanks
 

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General rule of thumb is 60 HP, but in reality it's less than that. I smoked my tranny in 2000 miles at the 60 HP Smarty setting, FWIW.

Do yourself a HUGE freakin' favor and do the tranny stuff first. Seriously. That K&N won't do anything 'cept dust your engine (do a search), and the Smarty is pointless if you can't put the power down.
 

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What would you recommend to do to the tranny???
Depends on what you want to spend and who's doing the work. VB at the very least followed by billet parts, TC and input. Three grand can get you an 800 HP tranny if you know what you're doing. For further clarification, go here.
 
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