Xtrac unveiled its special 100th IndyCar
gearbox at PRI 2015
gearbox at PRI 2015
photograph of Xtrac P1011 gearbox #100 at PRI 2015 by the author
During the 2015 PRI (Performance Racing Industry) show in Indianapolis, Xtrac unveiled its 100th IndyCar P1011 gearbox which has been specially modified as a cut-away to show its inner workings. This gearbox will be presented to the Indianapolis Motor Speedway Hall of Fame and Museum during May 2016 in honor of the 100th running of the Indianapolis 500-mile race.
Xtrac, founded in 1984, entered the Indianapolis-type car marketplace in 1989, and Xtrac gearbox components won their first Indianapolis ‘500’ in 1991 riding with Rick Mears in his Penske PC-20 Illmor Chevrolet, who won from the pole position and became the third four-time winner of the historic race. Xtrac followed up with wins with Al Unser Junior’s Galmer G92-Chevrolet in 1992 and Jacques Villeneuve’s amazing come-from-behind win at the controls of the Team Green Ford XB-powered Reynard in 1995. When the checkered flag falls on the 100th Indianapolis 500 on May 29.2016, Xtrac will record its 23rd Indianapolis ‘500’ win, and sixteenth consecutive ‘500’ victory.
Xtrac was the exclusive gearbox supplier to the Indy Racing League (IRL) from 2000 through 2010 with its type 195 and 295 gearboxes, then with INDYCAR as the exclusive supplier to the present day with the P1011 gearbox. Xtrac opened its 9000 square foot Indianapolis facility at 1685 West 80th Street in 2002, and began building gearboxes in Indianapolis in 2009.
Photograph of typical P1011 gearbox provide by Xtrac
The casing of the P1011 INDYCAR 6-speed (plus reverse) non-synchromesh gearbox is heat-treated L169 machinable aluminum casting alloy and includes a large deformable crash structure to help absorb energy from rear impacts. The drive inside the casing is fed from the engine directly to the gear change cluster and two pairs of straight-cut drop gears which in turn drive a hard cut Klingelnberg bevel set.
The Xtrac P1011 bevel set drives a lightweight spool with integral output flanges for oval racing use or an adjustable plate type differential on road courses. Gear changes are accomplished using the Megaline AGS (Assisted Gearchange System) a microprocessor controlled pneumatic system that allows the driver to shift via paddles on the steering wheel of the Dallara DW12. The complete gearbox weighs just 154 pounds.
The specially modified cut-away P1011 gearbox #100 was built by Simon Short, Xtrac’s first apprentice who has been with the company for 25 years. “Since Simon joined the company in 1990, Xtrac has continued with our highly successful apprentice programs and investment in new technologies,’ according to Vice President Andrew Heard, ‘we are very proud of our past history with the 500, and Xtrac is honored to take place in the 100th running of the Greatest Spectacle in Racing.”
The formal presentation of Xtrac P1011 gearbox #100 will take place during the month of May in ceremonies leading up to the race, and the gearbox will be on permanent display in the Indianapolis Motor Speedway Hall of Fame and Museum.
Information for this article provided by Xtrac.