From Ford press: The Ford Thunderbird reached its pinnacle as a personal luxury car with the 1975 model. Skipping the traditional three-year styling change for the first time, the 1975 design was basically the same as the previous model, except that the car was longer and heavier. Overall length was 223.9 inches, and the weight was 5,101.
The added length was to accommodate Ford's most powerful engine, the 460 CID V-8, and much of the added weight was accounted for by the addition of air conditioning - and the bigger engine - as standard equipment.
Other standard refinements were concealed windshield wipers, a distinctive opera window, dense-grain vinyl roof, solid-state ignition, power side windows, automatic seat-back release, spare tire lock and white sidewall, steel-belted, radial tires.
Available for the first time were power four-wheel disc brakes, making Thunderbird one of the few American-built cars to offer this safety-enhancing feature. The four-wheel disc brakes were more consistent when hot or wet and stopped the vehicle in shorter distances than conventional front disc/rear drum braking systems. Other options were power mini-vent windows, quick-defrost windshield and rear window and moon roof.
With the exception of three new luxury groups, the 1976 Thunderbird was basically the same as the 1975 version in terms of luxury, convenience, appearance and standard equipment levels.
New as optional equipment were a power lumbar seat and an AM/FM quadrasonic eight-track tape player. The greatest significance of the 1976 Thunderbird was that it marked the end of another Thunderbird era. After this, the flight of the Thunderbird would change directions.