The word "Truesports" is a portmanteau of the surname "Trueman" and the word "sports" or perhaps the word "motorsports." The primary crew chief of the team was Steve Horne, who would later start Tasman Motorsports.
In 1981, Trueman sponsored the car of owner/driver Vern Schuppan in the Indianapolis 500 The car came home third. Starting in 1982, the Truesports CART team was founded with Rahal driving. Rahal won his first race midway through the season at Cleveland Grand Prix. He followed that up with another win at Michigan, a second place finish in the season standings, and clinched the CART rookie of the year award.
In 1983 and 1984, Truesports continued to succeed with Rahal behind the wheel. They won three more races, and placed 7th at the 1984 Indianapolis 500.
Concurrent with their primary CART effort, Truesports ventured into IMSA racing on several occasions in the mid-1980s. In 1982, Trueman and Rahal finished second at the 12 Hours of Sebring. The duo also teamed up to race in the 1982 24 Hours of Le Mans with Garretson Developments, who Rahal won the 1981 24 Hours of Daytona.
For 1987, Steve Horne and other members of the Trueman family assumed day-to-day operations of the team. Truesports switched to the Lola chassis, and remained with the Cosworth powerplant. Several of the top team in CART, such as Penske and Patrick, moved to the Chevrolet-Ilmor. Hoping to win back-to-back races at Indy, Rahal qualifying second. His day ended early though with an ignition problem. Rahal won three races during the season, and clinched his second consecutive CART title.
In 1989, Truesports signed rookie Scott Pruett as driver. Pruett won co-Rookie of the Year at Indianapolis, and had one second place finish (Detroit). He went into the Detroit race with a decided advantange. He was one of few drivers in the field familiar with the Detroit street circuit (previously a Formula One course), and had won the SCCA Trans-Am Motor City 100 (a support race for the Formula One event) in 1987.
In March 1990, Pruett was seriously injured in a preseason testing crash at West Palm Beach, Florida, an IMSA street course. Raul Boesel drove as a replacement for the entire season. His best finish was 6th place. Pruett spend the entire 1990 season on the sidelines in physical rehab.
Starting in 1990, Truesports began exploring an in-house chassis building program. The Truesports All-American chassis was set to debut for 1991 CART season. Don Halliday did the primary design for the program. In 1990, the team drove the entire season in year-old cars Lola to save cost. When Pruett returned from injury in 1991, he drove the Truesports 91C-Judd machine to a respectable first season.
In 1992, the chassis was further developed, and was powered by the dominant Chevy Indy A engine. Pruett, however, still failed to win any races.
After a slumping 1992 season, and with Jim Trueman's death falling further into the past, the Truesports team decided to reorganize its assets. The team's physical assets, headquarters, and chassis program was absorbed into the Rahal-Hogan Racing team, co-owned by former Truesports driver Bobby Rahal. The remainder of the Trueman family businesses operated separately.
In 1993, Rahal-Hogan Racing attempted to continue the Truesports chassis program. It was rebranded the R/H chassis, and quickly scored a second place finish at Long Beach. The success was short-lived however, as the chassis proved uncompetetive on superspeedways. The team was dealt a massive blow when Rahal failed to qualify at Indianapolis a month later. The following week they switched to the more conventional Lola, while team driver Mike Groff attempted to salvage a season out of the R/H. By the end of the year, the chassis project was abandoned permanently.