First time poster! Great forum, already helped me fix a bunch of issues I've had with this 03 ext, 170k.
The problem: When coasting down steep grades in the Colorado Rockies the engine RPMs drop ~1500 and starts producing a really bad sound. I'll try to describe it: like change rattling around in a coffee can, a skateboard with bad bearings, gusting wind with a window cracked. Sound bit here: https://drive.google.com/open?id=1X__HMNZIHJ85YcWCak9MI7uQw6Ruzgn9
The noise stops immediately when any throttle is applied and the engine kind of thunks back into gear and everything sounds normal until the next downhill coast. I tried switching to neutral when this sound was occurring but it didn't have any effect, seemed like the truck was already in neutral. Tried switching to "auto" 4x4 and a horrible winding grinding sound started until slowing to a complete stop.
Known issues with the truck:
1. The 4hi and 4lo don't work. 4auto works. All the lights on the switch work 95% of the time, occasionally it will blink and nothing will light up. This is remedied by going into neutral and clicking from auto to 2hi/ 2hi to auto.
2.Fan clutch intermittently not working. Had a code for high fan speed a few times but usually turns off by itself.
Thanks for any inputs reading such a lengthy post. This car is my source of income (uber driver), so I really appreciate any help.
The problem: When coasting down steep grades in the Colorado Rockies the engine RPMs drop ~1500 and starts producing a really bad sound. I'll try to describe it: like change rattling around in a coffee can, a skateboard with bad bearings, gusting wind with a window cracked. Sound bit here: https://drive.google.com/open?id=1X__HMNZIHJ85YcWCak9MI7uQw6Ruzgn9
The noise stops immediately when any throttle is applied and the engine kind of thunks back into gear and everything sounds normal until the next downhill coast. I tried switching to neutral when this sound was occurring but it didn't have any effect, seemed like the truck was already in neutral. Tried switching to "auto" 4x4 and a horrible winding grinding sound started until slowing to a complete stop.
Known issues with the truck:
1. The 4hi and 4lo don't work. 4auto works. All the lights on the switch work 95% of the time, occasionally it will blink and nothing will light up. This is remedied by going into neutral and clicking from auto to 2hi/ 2hi to auto.
2.Fan clutch intermittently not working. Had a code for high fan speed a few times but usually turns off by itself.
Thanks for any inputs reading such a lengthy post. This car is my source of income (uber driver), so I really appreciate any help.