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Re: How to recognize - M45 or M46?[240-260/1979] posted by Evan on
Wednesday, 29 July 1998, at 7:45 a.m.
Chances are approximately 100% that if it has an overdrive it's an M46.
If you don't think you have an overdrive, look for a switch on the shift knob. If there's a slide switch, you have an overdrive.
If you don't have a switch, either you have an M45, or someone has switched the knob. Look under the car, just aft of the tranny crossmember. If you think you see something that looks like a miniature auto tranny pan, you have an overdrive.