appeared as the top level car. The Jack Nicklaus special edition, introduced with the previous edition, was a sales success for the company and continued to be offered as a hardtop and only with a turbocharged engine. Electronic adaptive self-levelling air suspension also appeared in June 1984. For the four-door hardtop, the front driver and passenger seat belt shoulder strap was connected at the top to the ceiling, however, the upper portion could be detached, with the shoulder strap resting on the driver's and passenger's shoulder so that rear passengers could have an unobstructed view from the rear seat without the seat belt hanging from the ceiling. The upper part would then swing up to the ceiling and could be fastened into place. June 1985 saw mild exterior changes, with the biggest mechanical change being a variable nozzle for the VG20ET turbocharged engine. The diesel straight-six engine LD28 was also upgraded to the RD28 Straight-6 engine. An ultrasonic sensing electronically controlled suspension called Super Sonic suspension was added to the options list, with an upgrade to MacPherson struts for the front and a rigid link coil suspension for the rear. Export versions usually received the diesel sixes or the three-liter six-cylinder engines, although there was also a version with the four-cylinder 2.3-litre SD23 engine, producing (SAE net). With nearly exactly the same specifications as the Japanese market engine, the fuel-injected three-liter six claimed (SAE net) or (DIN) in export, as opposed to JIS in Japan. There was also a carbureted version available in some markets such as the Middle East (VG30S), with at a lowly 4,800 rpm. Eighth generation Y31 The Y31 sedan was introduced in 1987. The Y30 hardtop was replaced by the succeeding Y32, and the Y30 Wagon/Van version was not replaced. After this generation, Glorias were only available to private customers in four-door hardtop guise. Engines available continue to be the newly developed VG series engine, with the VG20DET adding DOHC, another first for Nissan. June 1987 saw a special-edition Gloria intended for parade usage. The four-speed automatic transmission is now computer controlled for smoother shifts. The transmission now exclusively uses a floor-mounted gear shifter, and a five-speed manual transmission was still available. The rear suspension was upgraded to multi-link independent setup. Trim levels are standard, Custom, Super Custom, Classic, Classic SV, Gran Turismo, and Brougham VIP. There was also a long wheelbase model built by Autech.