The rotors are interchangeable. Usually see the rev limiter on manual trannies, helps keep over-enthusiastic drivers from over-reving the engine in lower gears. Automatic is more self-limiting.

No connection through the rotor will certainly prevent the car from starting!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!