the TC/2000 was produced only with the Chevrolet 7.0L gasoline V8 as standard with the Cummins 5.9L diesel inline-6 as an option; nearly all were produced with the Cummins. A 5-speed manual was standard, with the Allison AT545 as an option, but nearly all customers specified the automatic. Design timeline 1988: Late 1987 entry into production; only front-engine configuration offered. Gasoline (Chevrolet 7.0L) and diesel (Cummins 5.9L) engine offerings 1989: Minor update to front lights: rectangular reflectors from All American replaced by square units in between headlights. 1990: Largely unchanged from 1988 to 1989 1991: TC/2000 Rear Engine introduced to attract West Coast customers. As a running change, front bodywork TC/2000 Front Engine is redesigned with a flip-up access panel. This allows for better access and serviceability for drivers and mechanics; it requires the headlight bar and front bumper to be moved forward several inches. On front-engine models, the grille is redesigned for better cooling; 4 chrome bars replace the 4 slots (rear-engine versions use a blank version of the 1988-1990 bodywork). Inside, a redesigned engine cover takes up less space in the driver compartment. 1992: TC/2000 front bodywork redesigned on both versions. Similar to the All American, three hinged access panels allow access to service points and the engine radiator (on front-engine models). To distinguish itself from its All American counterpart, the TC/2000 Rear Engine has a false version of the front-engine grille (rather than none at all on the All American); in the rear, the TC/2000 is distinguished by the lack of engine intake vents above the rear side windows. 1993: As a result of changes to the Cummins diesel engine, the engine cover is redesigned further to give a much lower profile. Additionally, the gear shifter for the automatic transmission moves from the left side of the instrument panel to the right side. 1994: To lower costs, the TC/2000 now shares its pedals and instrument panel with the General Motors medium-duty truck line (the chassis used by the Blue Bird CV200) 1995: As diesel engines have largely replaced gasoline-fueled engines in transit-style school buses (as well as all full-size school buses), the Chevrolet 7.0L V8 is discontinued. 1996: Carryover from 1995 1997: TC/1000 introduced (see notes); flat-floor transit-style school bus based upon TC/2000. 1998: Carryover from 1997, last year for TC/2000 Rear Engine 1999: TC/2000 Rear Engine discontinued, replaced by All American A3RE. Front-engine models receive a