The A40 automatic transmission became an option on North American ST and LT models starting in the 1973 model year. For 1975 the 1974 body was used and sturdier chrome and black rubber bumper bars with horizontally mounted shock absorber mounts (Volvo style) replaced the chrome bumpers used in the earlier cars (in accordance with US Federal bumper laws) mandating impacts without minor damage at . Unfortunately the early 8R and 18R series engines proved to be less than durable, with early failures common. The 1974 18R-C engine's durability was improved somewhat, but the 20R introduced for 1975 proved to be a better engine in most respects.
The A40 automatic transmission became an option on North American ST and LT models starting in the 1973 model year. For 1975 the 1974 body was used and sturdier chrome and black rubber bumper bars with horizontally mounted shock absorber mounts (Volvo style) replaced the chrome bumpers used in the earlier cars (in accordance with US Federal bumper laws) mandating impacts without minor damage at  Unfortunately the early 8R and 18R series engines proved to be less than durable, with early failures common. The 1974 18R-C engine's durability was improved somewhat but the 20R introduced for 1975 proved to be a better engine in most respects