Subaru Legacy: Checking the fluid level - Automatic transmission fluid - Maintenance and service - Subaru Legacy Owners ManualSubaru Legacy: Checking the fluid level

The automatic transmission fluid expands largely as its temperature rises; the fluid level differs according to fluid temperature. Therefore, there are two different scales for checking the level of hot fluid and cold fluid on the level gauge.

Though the fluid level can be checked without warming up the fluid on the “COLD” range, we recommend checking the fluid level when the fluid is at operating temperature.

Checking the fluid level when the fluid is hot

Check the fluid level monthly.
1. Drive the vehicle several miles to raise the temperature of the transmission fluid up to normal operating temperature; 158 to 1768F (70 to 808C) is normal. 2. Park the vehicle on a level surface ...

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