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I sent the regulator for testing - it’s fine. I’ll be able to test both output and exciter when it gets back. I replaced the ESS box, but the old regulator was erratic and ultimately burnt the new box. Getting really tired of replacing it.

Oops! Missed this reply. 60 A alternator

I recently had a fluctuating voltmeter, at times pegging the meter, at other times stuck in the yellow range. I eventually replaced the voltage regulator, but not until the low voltage situation ruined my new and expensive ESS box. But now, my voltmeter will not get out of the yellow range. I...

So instead of a steady glow plug light, I get a single flash after turning on the ignition. Starter engages, just no glow.

I do not have the heavy duty alternator - believe mine is a 60-amp. Warm weather allowed starting - I started having these specific issues before it got cold, but now our 70-degree days are gone for a while here in Texas. Because I'm not getting a relay click from the box, but starter is...

When the old batteries were on their last leg, starting it would produce a clicking sound, like one of the relays in the box not getting enough juice. Since I replaced the batteries, I don't get the clicking sound, but neither do I get any solenoid/relay click at all. I haven't gotten a glow...

I swapped boxes several months ago - it had been working perfectly since. But batteries were low when I experienced the failure. New batteries are charged, connections tight, did everything I was supposed to. If low voltage is bad on the box, that has to be it. Any ideas if the damage is...

I've been having some nagging problems with Gunny (my '90 M998). Voltage gauge has been inconsistent and erratic, usually charging, but at times over- or under-charging. So upon inspection, I observed a crack in the VR potting material. I put off swapping the voltage regulator until my...

It's possible you have a stuck lifter. Run a full bottle of Seafoam in your crankcase at operating temp for 20-30 min, then change oil & filter. Worked for me, got rid of a very loud knocking/tapping. Even if it's not a stuck lifter, this is a good procedure anyway.

With a working tach, Hummer4x4guy, you should be able to see a noticeable drop when your locking T/C engages. And, depending on the shift controller you use, you might even have an indicator that comes on with the T/C engagement. 2500 is a bit high at 65 mph. My tach is inop, but the...

You have a bad output speed sensor. Easy fix. Just went through the same problem, back on the road in 2 hrs.

gem1410, I get the question - I run a 4L80e. My locking torque converter engages at the speed/RPM I want it to, using the Quick4 controller. It does NOT engage when it moves into 4th gear. In fact, it's almost like a 5th gear on the highway. Yours is probably set to engage at a speed that...

Hoping to tap into a specific set of experiences, here. I'm a couple of years into a transmission swap, now running a 4L80e, using a Quick4 controller. When the tranny was installed, I used the transmission output speed sensor, instead of the T-case. It didn't give me accurate speedo...

Hard to describe, but to me, it feels a bit lighter. It drives like a boat when the road is wet, but otherwise, all good. I've noticed accelerated wear on the rear tires, which is frustrating. With the 16.5 bead locks, my options are limited, so I'm considering 20" steelies and a better quality...

I used an aftermarket TPS I did have to modify the cross member, but no big deal I also swapped in s 242. Nice to have the 2WD option. The naysayers warned against it, but 20k miles later, I'm still happy 🙂

Never did, Norm. A complete fan clutch came up on ePay when I was looking, and given the decent price, I just went that route. I have my old one still, so when I ever need it, I'll be back looking for the seal. Good luck.

Sadly, these symptoms ring true with me. I have the Nartron EESS box. Last spring (in Texas, warm), I decided I would change my glow plugs as a matter of preventive maintenance. One was bad, but the rest had not been compromised. New ones seemed to work ok, but it was already 75+ weather, so...

Ok, appreciate the info on the box. Still puzzled about the fuel issues - does what I described sound like the fuel pump needs replacing?

Nartron

Recent troubles with my 1990 M998-A0 (6.5NA) that I would appreciate advice on. This summer, it ran fine here in the Texas heat. From the time I brought it home in March 2015, it had always started almost instantly. However, late this summer the crank to start time started going from near...