Are you certain it's not 2 different issues?

What happens if you're at a stop and turn the wheel? Moaning might indicate the steering pump.

Then try slowing down while going straight.
Slowing down (pedal breaking) -- any moaning
Slowing down (engine breaking) -- any moaning?

Stick? Automatic?
Stick -- engine breaking in gear, or in neutral?

The board is pretty quiet nowadays, but anytime posting, more details will get you a better chance at an answer. You might try on a general maintenance board instead of this isuzu specific board.

[color:"white"]? 04 Rodeo DI ?[/color] 75k mi, body damage on the 1st weekend I got it.