Piston Slap: Giving a Pacifica the (Drive) Shaft?

Stefan writes:

Sajeev,

We just had the drive shaft replaced on my wife’s 2008 Chrysler Pacifica AWD (no, not the new minivan — the old crossover). It’s been a good and reliable car in spite of its less than sterling reputation, and we have a little over 100,000 miles on it. The 4.0-liter engine with the six-speed transaxle delivers plenty of pickup and all was well until the (center) driveshaft went bad and we had it replaced by our trusty independent auto repair shop.

The problem lies with the new drive shaft, which shudders at low speed when you accelerate and moans between 40-50 mph. The shop can’t figure out what it can be and what to do.

So, what’s your take on the situation? Can you and the B&B provide some insight in this matter? The vehicle is well cared for otherwise and in excellent condition. I am inclined to keep on driving, since you don’t get much for them as a trade-in — but maybe it’s time to think of a replacement? What says you?

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