with
Porsche 917 After returning full-time to Australia in the mid-1970s Gardner won the 1977
Australian Sports Sedan Championship driving a highly modified
Chevrolet Corvair. That championship victory led into a team management role when he retired from full-time driving. After running the
Allan Grice Touring Car and Sports Sedan team in the late 70s, it rolled into a factory touring car preparation for
BMW in the
Australian Touring Car Championship, a team he would run from the programs toe in the water inception with a
BMW 318i turbo Sports Sedan in 1980 all the way until 1987 when Gardner decided to retire from motorsport and close the
JPS Team BMW after allegedly becoming fed up with the politics involved after his protest against the
Eggenberger Motorsport Ford Sierra RS500s at the
1987 James Hardie 1000 which had become a round of the inaugural
World Touring Car Championship. However, when asked about this in 1988, Gardner dismissed the notion saying instead that he had been unwell and simply needed a break. Gardner's last competitive drive was to be as co-driver with JPS Team lead driver
Jim Richards in the team's
Group C spec
BMW 635 CSi in the
1983 James Hardie 1000 at
Bathurst. After Richards qualified the car in a brilliant 4th place in Hardies Heroes, the black and gold BMW was suddenly seen as a dark horse for the race. However, race day was a disaster for the team. On lap 3 the BMW suddenly slowed and Richards headed for the pits where the team found metal filings in the fuel system. The car only did another 4 laps before being retired from the race. Gardner would later claim that he believed the car had been sabotaged although he did not know by who and wouldn't speculate on the reason, though the car not being Australian made and its cigarette sponsorship were popular theories at the time. However, as the cigarette sponsored
Holden Dealer Team (
Marlboro) and
Allan Moffat's
Mazda team (
Peter Stuyvesant) who finished Bathurst in first and second respectively were not targeted, some felt the car being European was a more likely reason. At the time, the long-held Holden and Ford V8 domination of Group C touring car racing in Australia was under serious threat with factory-backed teams from foreign manufacturers the likes of the European BMW, and Japanese marques
Mazda and
Nissan, and this was unpopular with not only the fans, but some within the sport itself. The claim of sabotage is actually disputed by Jim Richards and the team's chief mechanic Pip Baker who believe that the dirty fuel could have been a combination of things. Following the 1983 Bathurst 1000, Gardner was not only the team manager but also the main test driver for JPS Team BMW. This was because the team itself was based in Sydney (doing almost all of its testing at
Amaroo Park) while the team's drivers Richards and (from 1984)
Tony Longhurst lived in
Melbourne and on the
Gold Coast respectively. It is estimated that Gardner completed more time driving the various 635 CSi's and M3's than either Richards or Longhurst. Following his sudden retirement at the end of 1987, JPS Team BMW was replaced as BMW Australia's team by
Peter Brock's former
Holden Dealer Team operation, although that relationship ended after a single season in which the
BMW M3 had become uncompetitive against the increasingly powerful and numerous Sierras. During his time as leader of JPS Team BMW, the team won the
1985 and
1987 Australian Touring Car Championships with Jim Richards, driving first a 635 CSi and then an M3. Richards also won the
1985 and
1986 Australian Endurance Championships as well as the 1985
AMSCAR Series at
Amaroo Park while Longhurst won the AMSCAR in 1986 and 1987. Richards and Longhurst also teamed to win the
1985 Castrol 500 at
Sandown Raceway in the 635 CSi with their teammates
Neville Crichton and on-loan
Nissan driver
George Fury finishing 2nd. JPS team driver
Tony Longhurst decided to form his own team, which became known as
LoGaMo Racing, for 1988, running a Ford Sierra RS500, with Gardner acting as a 'consultant', although it was generally accepted that he and Longhurst shared the team manager duties. Gardner finally won the Bathurst 1000 in
1988 when Longhurst and
Tomas Mezera won in their
Benson & Hedges sponsored Sierra. The team continued to run the Fords through 1989 and 1990. During 1990 it was generally believed that the Benson & Hedges Sierras were the fastest and most powerful
Group A touring cars in the world. This was confirmed at the
1990 Tooheys 1000 at Bathurst when Longurst broke George Fury's
1984 Hardies Heroes lap record with a 2:13.84 lap in Friday's qualifying session, the Sierra reportedly topping on the long Conrod Straight. Unfortunately for the Gardner-led team, race results weren't as forthcoming with the only wins being in 1988 and later in the
Amaroo Park based AMSCAR series. When
BMW returned to the Australian championship in
1991 with its upgraded
BMW M3 Evolution model, it was with Longhurst Racing with Gardner at the helm with Formula One World Champion
Alan Jones driving the team's second car. The factory BMW team continued with Gardner at the helm until 1998 (switching to
Supertouring cars in 1994), winning the
1994 (with Longhurst),
1995 and
1997 (with
Paul Morris) Super Touring titles. ==Other activities==