I cited Wiki. That’s funny they got it wrong to ad to the confusion.
https://en.m.wikipedia.org/wiki/MagneRide
To make it more interesting, MagneRide, MRC, AutoRide are all valveless single tube shocks filled with magnetorheological fluid.
There’s two generations of the mag filled struts. The original with one coil and the newer version with two. GM doesn’t elaborate on the particular differences of MagneRide and AutoRide though.
I’ll take a stab that the Magneride offered by Caddie ... edit got the info ... approx 06-08 lead/tin was banned from ecu due to “tin whiskers”.
MagneRide is currently in its third generation, with the first iteration of the technology having debuted on the 2002 Cadillac STS Seville.
Compared to the first two generations, the third-gen MagneRide system includes enhanced seals and bearings to extend the system’s application to heavier vehicles such as pickup trucks and SUVs, with the most notable improvements being to the ECU and coils.
A legal requirement for lead-free ECUs prompted the control unit of the third-generation MagneRide system to be redesigned from the ground up. The all-new ECU has three times the computing capacity of the second-generation system, ten times the amount of memory, and more precise tuning.
While the first- and second-gen MagneRide systems used a single coil within one damper, the third-gen system uses two smaller coils wound in opposite directions. The change was made to eliminate a short delay lasting 20 ms in the reaction time of the dampers caused by a phenomenon with the single electromagnetic coil that took place from the time the ECU cut the current to the time the damper lost its magnetic field. This was caused by a temporary electric current in the electromagnet known as the eddy current. The change to a two-coil system resulted in the suspension system being able to respond faster.
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