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Planetary gear damaged by collision?

Old 07-31-2018, 05:00 PM
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Join Date: Jul 2018
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Default Planetary gear damaged by collision?

A week ago somebody in an Expedition backed into my pristine 2007 Explorer XLT, causing $3000 in damage to the front, however, it was still driveable.Two days later my transmission started to fail. I took it to a transmission shop, and after a test drive and discussing the accident, the mechanic explained that if I had the truck in Park (which it was), the collision damaged the planetary gear and sent debris into the unit once I drove it, and the repairs should be part of the insurance claim. Is this accurate, because I've never heard of this before.
Old 07-31-2018, 08:50 PM
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Join Date: Jul 2006
Posts: 6,282

Welcome to the site.
How many miles on the Ex?

Hard to understand how the planet would/could be damaged if the park pawl had the unit locked.. Was the pan pulled and inspected for debris?

Being it failed shortly after a collision, arguable with the adjuster/writer. Weather or not caused by the impact, and torn down would verify the cause. Could be at that point coverage comes into play, or not..
Old 08-01-2018, 03:52 AM
Senior Member
Join Date: Jun 2010
Posts: 9,164

I would suggest a second or third opinion on that diagnosis.

Snow job in the Sahara ???
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