From Club4AG.com

In the USA, AE86 and AE92 came in trims called the SR5 and GTS. The GTS was basically the trim level which included the 4A-GE DOHC engines in both versions of the Corolla. In the AE86, the driveline from transmission to the rear differential was different and included a lower 4.3 final gear ratio in the 5 speed transmission. The SR5 was 4.1, as well as the few AT equipped GTS. The GTS package also included rear disc brakes, higher grade interior trim, and body color front bumpers. Cosmetically the GTS also were trimmed with larger side moldings, Twin Cam 16 decal, and rear spoiler. SR5 versions had drum brakes and black bumpers as door moldings. In the case of AE92, the rear wing and side skirts were standard on the GTS as well as decals.

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