Re: Clunking noise from front end when under load
Most likely a worn U joint. It's more common to diagnose this problem on automatics, for when you change it from park to drive for example with the brake pressed you'll hear a 'clunk' sound. I hear it in my Durango (automatic) when taking off from a stop.
When you give the vehicle fuel the u joints bind back together to turn the rear pinion. I'd bet the rear u-joints are the problem as they're generally the first to go. I wouldn't let this problem go for much longer. If a u-joint is worn enough it will break causing the axle to fall from under the vehicle. If it's a forward joint the axle can fall down and catch a crack in the road and potentially flip the vehicle over. They'd have to be VERY badly worn for that to happen but I have seen it once in town a few years ago with an old F150. The guy was towing a landscape trailer up a hill when the truck turned on its side as it couldn't flip completely over due to the trailer being connected.
I'd take it back to the dealer for another diagnosis. Chances are the staff are all new as it's been five years since you were there.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!