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Power Strokes
7.3 Aftermarket
Gearvendor Overdrive
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[QUOTE="Corb@CorbinShipping, post: 334133, member: 2499"] Heavy Haul runs one on his 08 450 with 4.88s automatic and loves it. I bought one from a friend of his (still havent been able to instal it, need my other truck back so I can take it apart) But he tows heavy, up to 30 K, with it engaged, and changed the oil out every 5,000 miles, and has no issues. He has advised, same as have here, about downhill grades... def disengage it. I dont tow nearly as heavy. The biggest thing I pull is my 18K 5th wheel, and that is only once or twice a month. But I have 4.30 gears in my 450 with 33.4 inch tires. I would say if you have 3.73s, you might be asking alot of the other parts in your driveline. I will be installing mine in the next month or so, but I only plan on using it when I am very light, or empty. Towing heavy for me is not about speed. I am not comfy with 30 K gross, at 80 mph... 65 is my highway cruise speed when I am loaded down, and that puts me right where I need to be in the RPM band, So I wont use it when I am pulling the camper. But my boat, or a smaller load? Hell yeah! Empty? Hell yeah! Getting 14.5 MPG unloaded now, shooting for 20 MPG unloaded with the GV! [/QUOTE]
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