Truck Conversion & Toterhome Community - View Single Post

fastfish1967 · 01-13-2012, 02:00 PM

I just joined this site and need help. I am converting a 2006 Kenworth T300 FedEx expedite box truck to a 5th wheel puller. It has a 78 inch double bunk standup sleeper with a 22 ft. box. It is rated at 33K GVWR(12K front axle and 21K rear axle). I am going to haul three or maybe four exotic cars in an enclosed 44 ft stacker trailer. The truck has an 8.3 Cummins set at 350hp with 10 speed manual. The rear gears are 4.56:1. I need to get the best fuel mileage of course so what gear ratio do I need? I'm thinking of something around 3.70:1. Any help or advice will be appreciated!

01-13-2012, 02:00 PM	#5
fastfish1967 Junior Member Join Date: Jan 2012 Posts: 1	Gear ratio advice I just joined this site and need help. I am converting a 2006 Kenworth T300 FedEx expedite box truck to a 5th wheel puller. It has a 78 inch double bunk standup sleeper with a 22 ft. box. It is rated at 33K GVWR(12K front axle and 21K rear axle). I am going to haul three or maybe four exotic cars in an enclosed 44 ft stacker trailer. The truck has an 8.3 Cummins set at 350hp with 10 speed manual. The rear gears are 4.56:1. I need to get the best fuel mileage of course so what gear ratio do I need? I'm thinking of something around 3.70:1. Any help or advice will be appreciated!