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Ten points go to Mullaney, for suggesting Seafoam. It made an immediate difference. Truck has power back and the surging is greatly reduced. As I burn through the fresh tank of treated fuel I expect it to further improve. Still tweaking the trans link, been raining every day lately, but I'm...

@Mullaney, do you mean into the fuel? I am burning old fuel. I alternate between some stuff I got off a guy downsizing and pump diesel. The old diesel was carefully stored, and has no critters or water in it. I have a good filter setup on my transfer pump (luxury! came with the fuel purchase)...

Spent a hot sweaty hour and a half in the 95F 90% humidity learning how to align the shifting mechanism. As part of my "why does the engine race when hot and hate to be manually shifted to neutral when slowing" adventure, I decided to inspect the shift linkage. According to the TM, which has a...

Spent a hour and a half going under and out from under the HMMWV yesterday, realigning the shift levers. One was bent, made it too long. I'll write it up in the "What have you done" thread to reach more folks as info on aligning the shift levers. Still surging though. I am of the opinion...

You were right Action. It was over a quart low. It still surges though. My next theory is that the two control arms on the side of the tranny do not look completely parallel. This fits with the sometimes not in neutral until I fiddle with the shifter condition I see randomly. I’ll check the...

I'm running Treadwrights with bead locks from Trailworthy Fab (no run flats). I have no complaints. As far as availability or them selling only blemish tires (per MattNC above) I learned they only make them from time to time (once or twice a month maybe) and they sell out fast. I learned this...

Wobble is usually imbalance or a flat spot on the tires. One fellow earlier this year spotted tread missing as well. Sounds like you've handled those potential sources. Are your hubs mounted securely to the control arms? Could be loose. With each tire off, give the geared hub hell with side...

I’ll double check. Good point.

Thanks for this info and ideas springer1981 The fluid was about three cups overfilled. I drained and added back until the level was spot on. Haven’t driven it to test yet. I will read the EZ manual next and see about swapping the sensors as you suggest. This has only happened twice. Both times...

Thanks for the info Action. My truck does not have the second switch, as you imply, since it is not a factory install or reset power train. I will gather some details on the EZ TCU and see what I can figure out. It is mounted next to my washer fluid reservoir. Not the driest place on the truck...

I haven't been able to find a thread with a similar issue, so am posting my own: my HMMWV 6.5L TD and 4L80 surges when at idle but in Drive, but only when it is well warmed up. Cold the motor/trans holds idle fine when the transmission is in Drive. When the motor/trans warm up, and I come to a...

Replaced the frayed serpentine belt with a nice new one. The pulleys did not appear to be misaligned, as best I could tell with a straight edge. I am hoping that it was the inexpensive 6 rib Dayco belt someone else put on it that was the culprit. I'm running an 8 rib NAPA-Gates belt now and...

I've long believed that a REAL man has to wash his hands BEFORE he goes pee... Bulldogger

Thanks RWH. That hold true for my issue. BDGR

Cool! Thanks, I didn't realize I could just replace the boot. That's a will-do for my to-do list. BDGR

PM sent

Finally made time for some long overdue work. I removed each tire (new Treadwrights installed late last year) and checked the oil in every hub, cleaning up here and there. While each tire was off I also greased the zerks and visually inspected the brake pads and rotors. My tie rod boots are...

I had this problem with my old 60A (since upgraded the power plant to include alternator). In my case it was the regulator. A new regulator end cap and the problem went away and stayed away. I have that takeoff 60A alternator if you're interested. But it's definitely cheaper to buy a new...

The flashing Wait Light came back shortly after I jinxed myself by posting the preceding update. Life took over and I had to put it aside until this week. After a few more days of testing glow plugs and tracing wires, I managed to clear the fault by removing and cleaning the glow plug...

The TM calls for the mil-spec regulators to be set at 28V, but 27.5 is still more than 25.4V (roughly two fully charged 12v batteries) so you're charging them and producing excess capacity. Whether that half volt makes a big difference is up to you. If she runs OK and the batteries act fine...