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brown_ ... 1/13/2013

1994 Toyota Corolla DX 4 Cyl 1.6L


why wont the tramsmission shift into overdrive on cold days

just recently these symptoms have appeared affecting the car .
the temp.gauge indicator on the dash stays down on the "c" when normally it used to climb up to halfway between "c" and "h".
the transmission wont shift to overdrive until i drive it several miles when in the past it would shift when i got up tp highway speed.
my gas mileage has been reduced from 38 mpg down to 32 mpg since this has started.
no check engine or warning lights are coming on .
occurs on cold days (below 40 degrees f)
i have changed the trans fluid and filter.
flushed radiator and changed thermostat and antifreeze.

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