Water somewhere within the bodywork?

I need a bit more information please to help with this. Is it a regular 'tick tick' rhythm that changes with road speed or does it only happen occasionally then go quiet for a while? Is it loud or quiet? Does it happen on rough surfaced roads? Does it happen when turning tight corners or when braking harder?
A regular noise suggests a braking issue and a intermittent sound suggests a suspension problem. Sound does travel through the bodywork so the issue may not be exactly where you here it.
Please comment with a bit more information and I might be able to give you a more accurate answer.

Do you mean the RSC light ?

Roll stability control (RSC)/interactive vehicle dynamics (IVD)

Roll Stability Control (RSC)
The roll stability control (RSC) system monitors the roll-rate sensor and existing stability assist sensors and calculates if the vehicle may be approaching a situation where rollover is probable. If such a situation exists, the RSC system applies preemptive action. When activated, the RSC system adjusts the brake torque at specific wheels in response to direct measurement of the vehicle roll motion. By adjusting brake torque, the system can reduce the cornering forces and, therefore, the total roll moment acting on the vehicle. Systems with RSC have an additional roll-rate sensor located within the sensor cluster and additional programming within the ABS module to help control the vehicle during sudden maneuvers.
Information from the roll-rate sensor is fed into the ABS module. The computer uses information from the ABS wheel speed sensors, the throttle position sensor, the steering wheel angle, the steering wheel rate of change and a yaw rate sensor that measures the change in vehicle direction. If the computer determines from all these inputs that conditions exist for a potential roll over, the system applies one or more brakes and reduces engine torque to make the vehicle more stable.
If the event is severe and the driver's foot is not on the brake, the brake pedal moves to apply higher brake forces. A whooshing sound can also be heard from under the instrument panel in an event this severe .
I strongly suggest you have this vehicle towed to a ASE certified repair shop that knows this system !

what you to check this . look where the wipers are there is a plastic vent , see if you can ply it up . there is a drain on each side to let water drian inside the fenders. here is the link to my garage I am on facebookhttps://www.facebook.com/TedsRepairs

built into the brake pads is a small bit of metal that when the pads get to low to be safe , runs on the rotor and produces the squeal applying the brakes stops the vibration so the noise drops off

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

It sounds like condensed water from the air conditioner. Just like a glass with ice in it sweats, the cold part of an air conditioner sweats. That water needs to go somewhere. There is a drain on the bottom of the ductwork that comes out under the car, often toward the passenger side.

If the drain gets plugged, the A/C still sweats, but the water builds up inside the ductwork.

You can often clear the drain by blowing some air up the drain from the outside. (Don't use too much pressure!)

Water could be in the sill sections. There are usually several drains in every door and box section but the sill drains tend to be small and easily blocked by factory applied sealer as much as mud and dirt.
Sometimes a drain has to be "modified" and sometimes a new temporary or permanent drain must be produced.

The water location might be pinpointed by jacking the vehicle in certain ways while stationary.

Sounds like you might have a plugged drain hose from your condensor overflow reservoir. All of the water that drips off the condensor while you run your AC has to go somewhere. It's located under the passenger floor board and if it's not draining properly you can get a lot of water sitting in there.

well rushing water sounds are not going to cause a tranny to go.
but a bad rad sure will.
the rushing water you are hearing is an acumulation of water from the ac unit and it is building up in the catch pan.
the catch pan has a drain vain and is backed up with dust bunnys and road grime.
it needs to be lifted up and located and probed.
sometimes you can just pinch the tip .

The condensation drain is plugged in the heater/AC plenum, the drain is under the hood at the very bottom of the firewall on the passenger side.
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