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I'd go dollars to donuts that the majority of owners here have the 250 powered trucks because they were much lower cost to acquire. A2 not only had the double-efficient and half weight engine, but CTIS, and other tricks. I believe it is the 8.3L that is rated @ 10hp above the NHC-250. 4mpg vs...

The A2's get more than double the fuel economy. This is big if you really plan to stack on the mileage. The 8.3 is nearly half the size with a turbo, but same total hp potential (10hp higher if I remember correctly). The 250's have way more low end, the 8.3's have more top end (power), and...

Chinese Delco clone can be had for $89. Genuine used but functional Delco could be had off eBay for nearly same price. Al Jones makes some good points, but you have multiple things wrong with yours, and replacing it entirely fixes all of it in a single swoop.

Congrats on your purchase and welcome to the club. This is a great question. My A2 also can not break traction in 6 wheel hi-forward. A quick work around if you don't want to use low range is to simply pull in reverse with transfer in high. It will pull real strong, as reverse is geared at...

Funny. I'm popular. Try again. Need better clarity on what you want to do (add A/C and have 2 alts all same truck?). Or toss me your number and we can compare fishing stories.

If the pulley spun on the shaft already, like it has several times, the shaft and pulley will not be true anymore to hold correctly again, even with a new key. Weld it on from the nut end with a big glob, or replace the entire thing. People are still paying good money for working mil...

I could point you to the pulley, but for the $89 alternator, the distributors don't even have a listed phone number, and don't really offer returns if failed, though they say they do. I'd go with the Wolverine one. He is a member here, he answers his published phone number, he will honor the...

98G didn't say OP had an A2, he gave his experience and said the OP's engine was likely the same. Stock mil alternators are garbage, and yes once broken loose it will damage and continue to do so. An $89 Chinese Delco would be a suitable replacement. You will also need a pulley which are easy...

Good point, but I prefer the threaded stud posts. I simply removed my lead terminals from the cable ends under the seat, as the cable ends already have eyelets on them which drop right onto the battery posts. http://www.steelsoldiers.com/showthread.php?135257-Easy-M939-Group-31-Change-Over

This doesn't look like anything more than a fuse block? I'm assuming it connects to both batteries, and simply uses one for the 12v supply. So, no different than tapping one battery. Please correct me if I'm wrong here.

This is interesting and I found them, including their website, but it doesn't really say anything about the internals. For example, no current capability for the 12V or 24V outputs (does it use a DC-DC converter to get the 12v and is the 24v just straight through or also through a...

Interstate is also a JCI (Johnson Controls) battery. Good stuff.

A2 (8.3) starts fast, and doesn't need more than two group 31's, I went that route and live in MI (winters), no problem even on a cold January. Freed up a lot of room under the seat for added treasures. Walmart batteries are made by Johnson Controls, one of the leading battery suppliers to the...

Big 3 digit price drop on these kits on now free shipping. Check classifieds, make ice cubes.

Correct and yes. I do it this way also. The battery imbalance thing is a never-ending controversy. A lot speak of it, but there is yet to be any proven cases of it, at least here anyway. If the said converter limits spikes, it would be useful to power the ABS module with it so it does not go...

Same here. I'm not in a murder capital (23 miles from it), but when my wife thought she heard something in the house at night, I quickly doubted it and said if I was looking for free stuff, I would be skipping the house that had an M925A2 parked in the backyard. She agreed, and suddenly does...

Radar? Those are typically kW (thousands of watts). Do you mean radar detector? Yes, 40a would be enough unless the stereo is running an external amplifier.

I had a vibration issue at speeds over 40mph that would clear up when I switched the front axle on (18,000 miles on odo). Due to this, I immediately started looking at the front driveshaft, and suspected something in the U-joints or splined slip joint. I could move the spline joint some when...

Cummins part number 3911446, Screw, Banjo Connector, M12 x 1.5 x 24. I looked this up for my M925A2/Cummins 8.3L via my engine serial number on Cummins free Quickserve website. Yours will be the same. Looks like $20 or so. There shows to be a small plug in the end of it, maybe for a pressure...

Yes, but the 60amp military models are just as failure prone, there is just more of them in the market. Post a pic of your connection points.