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The automatic gearbox of my rear-wheel-drive 2008 Ford Territory goes into gear but won’t move and the gearbox oil is black.
Transmission fluid should generally be a pretty pink or red colour. If it’s black (and/or smells like burned toast) that suggests that it is way overdue for a change of fluid and a new filter, and also that there could be lots of wear inside the transmission.
Tiny bits of the clutches and bands that control an automatic like yours wear off over time and it’s these that are discolouring the fluid. That fact that they’re black, also suggest they’re burned having been overheated at some point in the past.
A transmission shop should be your first port of call, with instructions to diagnose what’s wrong and work out a strategy from there. If the transmission is badly worn, it may need replacing or rebuilding. But you might be lucky and discover that the fluid is simply old and depleted (from a leak somewhere) and the transmission may recover with a full service. Don’t count on it, however.
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