Casey and his team developed and built the second Tornado Intercept Vehicle, dubbed TIV 2, to be featured in their next IMAX movie and the "Storm Chasers" series. Work began in September 2007 by forty welding students at the Great Plains Technology Center in Lawton, Oklahoma and was completed in time for the 2008 tornado chase season. TIV 2 was designed to address some of the problems experienced with the original TIV, namely its low ground clearance, lack of four-wheel drive, and low top speed. It is based on a Dodge Ram 3500 that was strengthened and converted to six-wheel drive by adding a third axle. After season two the six-wheel drive system was modified to four-wheel drive. It is powered by a 6.7-liter Cummins turbocharged diesel engine, modified with propane and water injection to produce . This gives TIV 2 an estimated top speed of over . Its fuel capacity is , giving TIV 2 an approximate range of . The body of TIV 2 is constructed of a 1/8-inch steel skin welded over a square tubing steel frame. The windows in TIV 2 are all bullet-resistant interlayered polycarbonate sheets and tempered glass. TIV 2 also features an IMAX filming turret similar to the one on the original TIV. The original TIV's somewhat cumbersome hydraulic claws were not used on TIV 2 in favor of six hydraulic skirts that drop down to deflect wind over the TIV to stabilize it and protect the underside from debris, and four hydraulically operated anchoring spikes.