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I think the remedy to alleviate the voltage regulator issues on the 24V MV OEM alternators is the Delco Remy SI 24V alternator modification. There are a number of threads here on the modification. A one wire hook up and an aftermarket pulley on the Delco to spin it faster is simply years...

Thanks Munchies, I'll chat up Jesse. It's nice to see that this revised thread is still helping guys out and the procedures resulted in success for some guys :0). We fired up the wrecker today and loaded up two NOS MT654CR trannys in their steel shipping crates onto a M116A3 flatbed trailer...

Thanks brother. That's my next step or possibly do the Delco Remy SI alternator modification. I've been a motor head since I've been a kid, I've just never seen an alternator voltage regulator "linger" like this before. They're either OK or bad...:0(

I've been having inconsistent voltage spiking issues on my M936A1. Not having a volt meter, I found an excuse on spending $150 on a Fluke meter, nice to have something broken as an excuse to buy a nice tool! Anyway, after charging each of my Hawker AGM batteries independently and testing each...