I've been living with a high frequency vibration under load on my 07 2.5T (173k) for several months. It's been getting progressively worse. I've swapped axles a couple of times, replaced the front wheel bearings, and all the engine mounts. No luck. There's noticeable radial play in the left output shaft and high levels of aluminum, lead, copper, and tin in the transmission fluid. So, something is going inside. I suspect that a differential bearing is failing. No noise from the transmission. The transmission shifts fine. Not the typical Volvo automatic transmission problem.
While I'd love to do a manual swap, the cost is easily 2x replacing the AW55 with a used unit.
So, I've started searching for lower mileage 05+ AW55-51SNs. I've found a couple w/ under 50k. But, are 05s that have been sitting for 10-15 years. Not sure about that. Several in the 75k-100k range for reasonable prices. I'll be replacing seals, filter, fluid, and radiator (don't want to risk any debris from the old cooler).
I'll either grab some low mileage Volvo axles or some new GKN axles. Toss in a Magnefine filter and a plate transmission cooler I've had sitting around forever.
Then, hope for the best!
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