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Thanks! Just wasn't sure if vibration was a symptom of a bad one or not. Either way it needs to be replaced from age.

That was my thought too. I know they tend to go out and could cause damage to the engine. Thoughts on a decent brand to get? Or are they are all the same? I know Fluidampr is the best but $400 is a little much to spend. I'll try that first since its easy to swap out.

Still new to this M1008 truck and I'm trying to find out how much vibration is normal in these trucks at idle. The dash rattles and other parts rattle on the inside with the truck in drive at a stop. Also the bed rattles and you can clearly hear it outside the truck. Is this a common...

When was the last time you had the oil changed in the front diff? If you had gone through some deep water spots, it can enter through the seals and contaminate the gear oil. I'd pull the front diff cover ASAP to make sure the gears and oil look ok. Any shop should be able to do this.

I'll check each plug for continuity. Going to fix the solenoid tomorrow along with ATF change with filter. Going to try type F and see if that helps the slight slipping in 3rd. Worth a shot before I have it rebuilt.

Found Orielly near me has one. Part #- BWD S603 https://www.oreillyauto.com/detail/bwd-3123/performance-16477/engine-16841/charging---starting-16818/starter-components-17360/bwd-starter-solenoid/s603/2611354?q=S603

FINALLY found the issue! Glow plug solenoid. Soon as I removed the wire going to the bus bar, my 12v probe showed no current. No sparks either. So now I need replace this. Hopefully its wired correctly. Previous owner did replace glow plugs but doesnt look like this was messed with...

Will look at that too. Since I can actually connect the battery and start the truck, I think its a load like the glow plugs or something. I don't think its a short then there would be smoke and melted wires somewhere. I just need to keep disconnecting stuff until I find the culprit. Thanks...

I hope its something simple. Whats funny is I bought the truck like this with the batteries connected. Charged them up, re-connected and drives around fine. But you are right, need to keep an extinguisher. I agree. I'm actually shocked my cheap Harbor Freight MM is still working. I went...

I'll give that a shot. I've connected a many batteries over the years dealing with cars and never had one arc like this. Very frustrating when you all you want to do is drive it. Also my third gear is slipping so I have that going for me too. :(

Thanks I will look there. Thanks for the info. Already pulled ALL the fuses so they are not installed at this time. I do have an amp meter for 10amps or less. I do have more than 10 amps going through the last battery wire I connect. I haven't tried the ignition switch yet.

Thanks! I'll try that. I thought maybe my alternators were causing the draw with a bad diode but with both disconnected of all wires I now think it was the brake controller or the bumper lights. Didn't have time to pin point which one on my lunch hour. Is there any other common battery draw...

I recently purchased my first military vehicle. 1986 M1008 Trying to troubleshoot a battery drain on both batteries that happens over night. I think I finally traced it down to either a trailer brake controller previous owner added or the front and rear lights on the bumpers. EVERTHING is...