Loud something, clunk, force and Gone? Mystery - Ford Powerstroke Diesel Forum
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Old 04-27-2013, 09:36 AM
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Unhappy Loud something, clunk, force and Gone? Mystery

F350 4 door super duty with 52K on it. I had the EGR replaced at 25K and am ready to get the EGR delete kit, cooler kit and larger exhaust. All the extended warranties are expired and I can work with it now.

My 6.0 is located in Elko Nevada and pulls a 89' 18' Layton twice a year, but is pissed about that. It almost overheats (seems like it is on fire around the front of the truck after pulling it around) and then the A/C doesn't work for a few days? Truck works without alarms, but pumps hot air for a few days, then magically works a few days later? Dealership can't reproduce the problem which means it doesn't exists - I guess.

BUT last night, driving home with my lovely wife (pulling nothing) it made the weirdest noise. While approaching a Stop light, my truck sounded like a Harley for about 4 second, clunked like someone hit the rear of my truck and then jerked and clunked. I immediately pulled through traffic light and looked the truck over to find nothing; anywhere. This morning - no leaks, nothing changed, nothing loose, nothing scary. BUT I am scared to drive it, maybe the bottom will fall out? Any thoughts? Please let me know.

Last edited by elkonv; 04-27-2013 at 09:50 AM.
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Old 04-28-2013, 03:39 PM
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Must be transmission or auto-clutch or ??

I took the truck above out for a drive; better to break close to home than on a trip in the mountains. Going into town about 15 miles in the morning, the truck had zero problems. Driving home, I reduced speed from 55 MPH to 10 approaching a stop light, when suddenly loud noise (like a Harley motorcycle) and then a clunk followed by a forward push. It seems to me that it is not the motor but the transmission or auto-shifting gears problems. Any help?
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Old 04-28-2013, 03:49 PM
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i had the same exact problem but was never able to figure it out and it went away, it only happened when under decel sounded like big mud terrain tires slowing down the WHAM!! scared the crap outta me every time it did it but now it has not happened in the last 4 months or so
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Old 05-05-2013, 06:51 PM
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Shift solenoids.


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