Transmission modulator help

Is a automatic transmission modulator from a 1959 thru 1964 Rambler V8 the same one used on a 58-60 Rambler American 6 cylinder?

Do they have the internal adjustment screw? IF so, (and I think they all do, at least later) maybe......

The timing of the upshifts/downshifts is controlled by rotating the modulator body clockwise for higher pressure or counterclock for lower pressure. Higher pressure, however, will cause the trans to engage much more harshly when put in gear initially. You may be able to tweak the modulator setting to get the shift pattern where you like it- even if it is meant for a V8. I don't see a real risk of damage- worst case would be that it just won't shift correctly. Just avoid going over 110 psi on the control pressure- ideally you're looking for about 80-90.

Can you tell me if the 60 M8 auto behind a 196 F head is the same as one behind a OHV 19?  I have a trans that has been rebuilt and has a new vacuum modulator but not visible wire for a kick down solenoid inside.  I see on a 61 Classic with OHV there is a wire coming out of the larger size modulator.

I'm trying to decide if the trans will have  passing gear?

Thanks for your help or guidance to someone who might know.

Ron

My parts car, a 61 Classic has a wire coming out of the modulator.  My 60 M8 does not have the wire that the TSM says should be there.  It does not say wher e from just that it has a passing gear switch on the carb linkage.  I am trying to find out if the 60 M8 did or didn't have the passing gear.  If it was available, I'd like to make an attempt at installing it.

 My new 196 bored .06, 9-1 compression, mild cam full flow oil filter hopefully will run good enough to make passing gear helpful.

Hope this helps clear up my concerns,