2001 Dodge Ram 4wd, V-8. Water rushing sound behind dash when turning or accelerating. Also, when air control is on vent, and the temp control is at full cold, I mostly get hot air through the vents, with occasional changes to cold, but not many. Engine temp is normal. Rushing water sound is like driving through pea gravel after road tarred.

Check taht the dash controls are moving to the selected option.Check for broken cracked vacuum lines to actuators for vents

my 98 has the same water noise. i went to a well established garage and asked the owner. he and his brother both have rams and have the same noise. i guess its a ram thing. its coming from the heater core. they said its nothing to worry about. his done it since he bought it 6 years ago

That sounds like a bad heater core talking

You have a vacuum leak or the little valve in the vac line on the passenger side of the intake is bad

burp the system....take cap off and lift front end 6-8 inches to let all the air out of the coolant system...

CHECK YOUR AC DRAIN AND MAKE SURE IT IS OPEN

you need to look down the air fins,where the wipers are coming thru,it sounds like the drain hole is blocked

I had a 1994 Dodge Ram. The Red Dodge Ram I had it malfunctioned and my brake became the throttle. I had to put the truck in reverse then park. to stop, after it was out of control at 80 mph a hill slowed us down. Are you sure its not electrical and the curse control is not giving you trouble? Mine had multifunction switch was not working and the headlight switch burned up. I also found out that Audi had problem with the brake becoming the throttle in the 1980s Daimler Chrysler and Audi were German made. I don't think there is an easy answer. I hope you stay safe. Another man is having strange trouble also. I'm sure there are many more people with trouble with the vehicles. I wish Dodge would step up to the truth. and recall their nightmares. I saw many of their 1996 Dodge trucks at their dealers shop with all the electrical pulled out.

See if you can find the heater control valve. It will either have a cable or a vacuum hose. if it has a cable and you can close the valve manually than it is a problem with control head in the dash, if not replace the valve. if it's a hose then check for vacuum at the hose with heat in the off position. If no vacuum and valve is still open then replace the valve. if vacuum is present problem is in the control head in the dash. hope this helps.

Sounds Like Air in the cooling system...Run engine to Normal temp.. see if it will take on more coolant