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Awesome pics and info tomelroy! I’m about to begin installing one of the PATC Raptor II kits that claims to be HMMWV bolt in. It came with the adjustable TV cable, diesel torque converter, tail shaft housing adapter, 32 spline tail-shaft, up-built 700r4, and I think I remember seeing the...

Tomelroy just curious if you ever had a chance to post up any pics or upload vids to YouTube?

Ok, so I went through all of the troubleshooting flow charts in the TM and my fan/clutch system is functioning as designed. I then decided to drain/flush the cooling system. I tested the coolant that came out and it was almost pure antifreeze. After a few drain and fills with water running to...

Thanks for the reference to the tech manual. I will download and research this today. I'm thinking it may just be a dirty cooling pack, or possibly airflow issues. I'll know more once I complete the troubleshooting steps for the fan and clutch system.

I have read in some threads that the fan clutch should engage at around 220f and release around 208f. I've had my M998 for about 6months now and I've noticed that my cooling fan comes on at around 190f on the gauge, and stays on after that(even in cool weather at medium hwy speeds). The temp can...