Shifting hard on warm days
#1
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I live in Sunny Florida. When we had cooler weather the past few days (less than 73 degrees F), I noticed the car shifting smoothly. When the temperature went back up to 77 today, I noticed the car shifting harder. I'll say the shifting problem has been going on for awhile, but today is the first time I think I've narrowed it down to the ambient temperature. I also noticed it shifting smoother when I recently replaced the MAF sensor, but that lasted a few hundred miles. The fluid has been changed twice by the local Lexus dealer. Throttle body has been cleaned. Air filter was replaced a few months ago.
Does anyone have any ideas? It's an 06 and shouldn't be affected by the 04-05 transmission TSB.
TIA.
Does anyone have any ideas? It's an 06 and shouldn't be affected by the 04-05 transmission TSB.
TIA.
Last edited by lsdude; 01-16-16 at 04:05 PM. Reason: Adding more context
#3
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I took it back after the second fluid swap. They told me they looked at it, spent hours, had their master tech analyze it and didn't see anything wrong. It did feel a little better after replacing MAF sensor but not butter smooth. Maybe I should drain and fill myself to make sure it's done right.
The original reason why I changed the fluid was the transmission shifting issue (hoping it was the fluid). But that didn't help the situation. This car was owned by an elderly woman who went to a nursing home.
The original reason why I changed the fluid was the transmission shifting issue (hoping it was the fluid). But that didn't help the situation. This car was owned by an elderly woman who went to a nursing home.
#4
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Is the hard shift when accelerating, down shifting, or both? I know it sounds odd but you may want to replace your engine temp sensor. If its malfunctioning it can cause weird things to happen and you will not get an engine check light.
Last edited by Lavrishevo; 01-16-16 at 04:43 PM.
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#9
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Thanks for everyone's input. After also realizing that shifting from 5th to 6th was not smooth, I went ahead and replaced the engine temp sensor. What a difference! The car shifts much smoother and is enjoyable again. I also cleaned the idle port which may have helped. Thanks again for everyone's help. This forum is an invaluable tool with great folks!
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