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A couple not so good things. The intake is open right under the hood drip line so the engine has likely ingested some rain. And the way the engine is painted looks like a rebuild, likely a Melton and they have a very poor reputation. Hopefully all that means nothing!!!

I purchase a 1993 M998 from GP and it had the original 1993 tires on it, so that may be more common than one would think. Also your inst. panel does not look molested so that is likely the "original" speedo, usually if it has been replaced you can tell because even if they started out with the...

Welcome to the SS forums.

Is it possible someone tried to adjust the idle using the tach error and now it is idling too slow? I have had many alternators (non military) over the years that would not "kick in" at idle that worked just fine other than that so as long as it starts charging when the engine RPM is raised I...

The HMMWV is known for having brakes that chatter, likely because the brake discs are not mounted directly to a wheel and tire ass which would naturally damped the high frequency chatter, it is usually mostly common to the rear brakes. One trick we used to do back in the 70s on our motorcycles...

The temperature sending unit is on the left front of the engine and only has one wire, that is the cold advance sending unit.

I do not know of any specific test you could do to prove the TCM was bad but lets recap. 1, You can put the TCM into diag. mode so the TCM is getting both sources of power it needs to work. (continuous 12V and switched 12V) 2, You can disconnect a sensor that should set a code and turn on the...

https://www.foxnews.com/us/two-injured-military-vehicle-crashes-over-highway-retaining-wall-plunges-30-feet-road-below If it had been I doubt they would have just received minor injuries

Glad to see someone plugging those holes, I actually have the factory intake port caps for the heads, they have very small slits in them so you can turn the motor over, :)

I have seen laminated glass and I have seen tempered glass but never laminated tempered glass.

I install a GPS speedo in my HMMWVs, never heard of a GPS tach. The cure for the error with the 400A alt is to replace the alt with a 200A or the the pulley on the 400A alt, that 400A is a beast and causes other issues with shorted harnesses and failed mounting bolts.

You are looking at around 4-5 grand without the custom machine work or install labor :)

I did, it is a much better transmission that the 4L80 as far as efficiency goes and is just a strong (hence the 80 rating) It is allot of work and some of it is custom so not something you can get done "down the road" (or anywhere for that matter, you have to do the custom work yourself) Here is...

I would think pretty close to 7/8"

If it has the 400A alt it likely has an overdrive pulley so the RPM will show higher than it actually is, the turbo also has the highest ratio diffs at 3.07:1 so they do rev higher than the A2 trucks with the 4L80

It is 5/8" ID hose

That is what most folks do.

I do not think the TCM stores codes, so the TOSS may have cleared when it was reconnected, the supplement should describe what clears the codes (besides disconnecting the batteries) It does seem to point to a TCM issue. IIRC some codes would clear when the vehicle was shut off and re-started if...

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I have one meter that flashes a warning light if you select a measurement type that is not compatible with the way the leads are plugged in, I thought that was pretty cool :)