Question about 2003 Oldsmobile Alero

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Hard down shifts

2003 Alero, 3.4L So far this has only happened at highway speeds. On light acceleration, if feels a little like the car hydroplaned and the the transmission slams down a gear for a few seconds. The acceleration is not enough to warrant shifting down. Someone said this cold be a fuel filter problem.

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  • chance_r_and Oct 22, 2009

    Transmission Fluid is clean.

    The ignition coil wiring harness had been pinched an the wires were shorting out, or so GM told me. The worked on it for 2 days trying to find the problem, but only charged 120.00! Thanks.

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  • Oldsmobile Master
  • 3,854 Answers

Check the transmission fluid level, see if there is any foaming in the fluid which is bad, and condition, If the fluid is low the transmission fluid pressure could be low and if the transmission fluid filter is dirty, that could also be restricted the fluid flow.
The transmission fluid should be bright red like strawberry in colour, if it's dark like burgundy then it's time to change the transmission oil and filter. The hard down shifting could be a servo that is sticking caused by dirt in the fluid, have a Transmission shop service the transmission and scan the car's ECM for any codes that may be causing your shifting problem.
Good luck and hope this helps.

Posted on May 26, 2009

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Posted on Jan 02, 2017

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