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When the engine heats up on my 2007 Nissan X-Trail, the automatic transmission struggles to change gears. This is especially so when I stop and the transmission must shift from first to second. Any suggestions?
Engines and transmissions need to operate across a wide range of temperatures, from zero (or lower) on a cold morning, to extremely hot (when towing a trailer across the Nullarbor in mid-summer). Sometimes these differing operating temperatures bring out different behaviours.
The problem of selecting gears is often caused by wear or a fault in the transmission’s valve body, or it could be something else within the gearbox such as a worn clutch-pack or band. On a simpler level, you could be looking at something as easy to fix as a mis-aligned or mal-adjusted selector cable. Another possibility is a low transmission fluid level. If this is the case, you need to find the source of the leak, not just top up the level, as a transmission is a sealed unit that shouldn’t need topping up.
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