Transmission

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Doing a swap, what tranny use the 4.6. 5r55w or 5r55e?

My car has 100000 miles.
My car has an automatic transmission.

For this 2004 year Mercury Mountaineer they were only equipped with a 5R55S transmission for the 4.0 and 4.6 liter motors. The only different transmissions would be for rear wheel drive or all wheel drive. They are both 5R55S base transmissions.

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