Finally, the E28 M535i is one of the few M Series models to have been available with an automatic transmission, in this case the ZF 4 HP 22 unit with Sport, Economy and Manual shift modes and the following ratios: 2.48 (1), 1.48 (2), 1.00 (3), .73 (4). Automatic cars are equipped with a 3.45:1 rear axle ratio with limited slip.  
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