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I reached out to Niehoff and they said there was a pretty good chance it should work between those two particular regulators, and if it didn't, very little chance it should hurt anything. SO... waiting on parts :-)

I suppose my biggest concern is the AC phase wire going into the regulator. If that's different between alternators in a way that makes the regulators not be cross compatible, then I'm probably out of luck.

Did the test per pp 6 in one of the Niehoff tech guides that more or less matches my alternator. The only thing that I really couldn't check well was the field coil resistance, since I'd need to know what that is specifically for the alternator model I have, but it wasn't crazy town (it read 2...

Not expecting 400amps. Just want to know if it will work.

NormB, My EE education is so rusty now it has sunk, and fish are swimming through it in its new role as an artificial reef, but that was my gut as well: if the regulator fits, and the wires line up, then it should stand a good chance of working. The price for the 400 amp regulator is a quarter...

I think the 200amp regulator on my '92 m998 is shot. Sometimes I get charge, sometimes, I don't, voltage floats around, it cuts in and out, etc. Troubleshooting indicates that alternator is probably OK. I've cleaned up all the wires I can find. Looking at the auction sites and elsewhere, right...

Well, at least one more part to buy for this conversion. The original rear part of the front diff mount won't fit over the larger 1330 yoke. It looks like the correct part that will is 12342801 . The original looks like the image on top with two circular cutouts in the mount, while the new mount...

Thank you! All the diffs are 2.56, I've checked that. On my A0, the rear diff has the larger yoke, and the broken front diff has the smaller yoke. The new front diff has the larger yoke. Per your pm, 12342620 drive shaft component should allow me to put the new front diff in without replacing...

Been doing a bit more research. It looks like I may be able to frankenstein the front drive shaft by putting in later front section which has the 4" ujoint rather than the 3.5" ujoint. It wouldn't be bad idea to replace drive shaft carrier assembly which looks pretty ugly. It looks like people...

So it looks like my new front differential has the yoke for a rear differential on it. Unless anyone knows of any clever way around this, it look like I'll be replacing the yoke with the old one and back to where I started hoping that my new inch-lb torque wrench does the trick.

You know, I have to stop saying things like "almost certain" because I'm proved wrong more often than right :-) I got the diff out today, opened it up, and all the teeth seem to be there on the ring and pinion, which means the tooth I found probably came from inside the torsen. I'm going to...

I'm grateful anyway. It made me look at the manual, which made me look at the truck :-)

Almost certain the pinion, but I'll double check when I get it apart. The truck was delivered with no oil in the front diff, so if took a real beating before I got it. It made it two years and a few thousand miles before before fully losing a tooth, but it had been grinding itself apart until then.

You're absolutely right. While the mount on my truck doesn't look that that (it's part 9 in the below diagram), what I thought was a full circle in the mount actually has a cutout at the top so I can slide the mount off. I missed the cutout in the grime and not having a proper work light setup...

Welcome from the Upper Valley of NH! I've had my 1992 M998 registered and inspected for a couple of years now. I had no problem, but we register in the town offices in NH so your mileage may vary. My town was a bit confused, but cooperative. I had to get the police to run the "vin" through the...

My front diff had a dental problem: it lost some teeth :-) I've got what is claimed to be brand new 2.56 ratio one, and it looks at least freshly rebuilt. To take out the old one and put in the new I need to remove the pinion nut to take off the yoke in order to pull it through the rear diff...

I called around locally today, and none of the reputable shops will touch this with a 10 foot pole without sourcing all the parts themselves. I understand their perspective, but from a cost standpoint I might as well buy a new or rebuilt 2.56 diff somewhere that specializes in HMMWV gear. I'll...

When I got my truck two years ago, it was delivered without oil in the front diff. I filled it up with oil and drove it until now, changing the oil a couple times at the very beginning, and then each year. There were always shavings on the magnetic plug, but this year, there was a gear tooth on...

Last night I changed the fluid by running the truck and draining from the fan hookup on the activated Cadillac valve. At least temporarily, the problem seems to be fixed. The weird thing is that without noticeable change in flow from the low pressure hose I was draining from, fluid seemed to...

So, after just loose belts, the pump was my first though too. What I'm confused about (never had a pump go bad in my relatively short lifetime) is, why would the belts squeal with a bad pump? Would' the squealing belts indicate the pump is working really hard, or can it work hard and be weak at...