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help please....need more power but.....
don't want to put in gages and all.....have a psd E-350 ext. with 3500 lbs. inside 24/7......service van on lease...with 3.55 gears dog off the line should have got the 4.10's live and learn and gear change? how much to get it installed and buy 4.10 L/S has 3.55 L/S now. what about a chip that way i can pull it and reuse in next one or pull it if i don't buy it at end of lease. but without gages how would i know if i am hurting it do not want to lose warrenty. thanks
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