Wow, you guys are going super agressive with the gears. 4.56's for 33's? LOL yeah it will accelerate good but Highway mileage will be crap. 4.10's for 33's is just fine.

 

well, i'm sorry that im not into this **** to the point to know everything
i was just giving my opinnion and you dont have to be such an *******!
so **** you
*******

 

I did know one person that had it on his Volvo highway truck with a Volvo D12 diesel engine. He claimed a minimum 20% increase when loaded. I physicaly saw the unit but could not confirm his mileage claims. This was also a heavy duty diesel. I have no reason to believe he would lie accept maybe to justify the huge cash he shelled out for the unit itself. This was over 3 tears ago and I believe he said it was in the range of $10,000 to install the unit but it had a 30 year life expectancy and was transferable from one truck to another.