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'09 Highlander rpms reving in overdrive


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Furiousimages
New User

Mar 14, 2023, 4:52 AM

Post #1 of 5 (1869 views)
'09 Highlander rpms reving in overdrive Sign In

2009 Toyota Highlander, 4 cylinder, 170k+ miles.

When the vehicle is in the last gear (6th/overdrive) and your giving it gas the rpms will start bouncing from 2000 to 2500 and back repeatedly. If you let off the gas it stops, and if you give it enough gas that it downshifts it stops. It only does it in that one gear. Other than that the vehicle runs fine, idles fine, has plenty of power, doesn't miss, isn't sluggish at all, changes gears smoothly.

In an effort to try and narrow down the issue maybe I have tried driving it multiple times in the mode where I am able to manually switch the gears. This yields the same results. As long as I stop at 5th gear and never go to 6th everything is fine.

In full disclosure just in case it needs to be known I have just had the top end of the engine rebuilt due to a timing belt breaking and messing everything up. However the current issue was present BEFORE that ever happened. So it should have nothing at all to do with it I think?

I have some general repair knowledge but it's nothing extensive and to be honest this has me confused. It is my wife's vehicle, we have 4 kids, and I am so worried they will end up stuck somewhere. Obviously I just sunk what to me at least was a small fortune in getting the motor fixed and I am just praying that whatever is wrong isn't going to be super costly, hopefully maybe even something I am able to fix myself. Any help or guidance would be very appreciated. I know that now is dire times for lots of people not just me, and as much as I hate having to ask anyone for help, I just find myself in a tough spot right now. Thanks in advance and I hope I have posted all the information needed and done it by the forum rules.



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Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 14, 2023, 5:05 AM

Post #2 of 5 (1853 views)
Re: '09 Highlander rpms reving in overdrive Sign In

Sounds like it could be a bad torque converter but I moved your question into the transmission section so our trans expert (Gary) will see it. He'll be along when he has time.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Furiousimages
New User

Mar 14, 2023, 8:47 AM

Post #3 of 5 (1830 views)
Re: '09 Highlander rpms reving in overdrive Sign In

Sorry for putting it in the wrong place.

Thank you for the reply and for moving it for me. Based off of the research I have done online I myself was leaning towards torque converter also, but I am far from knowledgeable about anything transmission related so I could be completely wrong. And I for sure don't have the money to throw parts at it. Makes me alot more confident having someone else come up with that same conclusion. I'll wait and see what Gary says about it. Thanks again!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 14, 2023, 8:53 AM

Post #4 of 5 (1822 views)
Re: '09 Highlander rpms reving in overdrive Sign In

Yes, there is also a solenoid that controls the torque converter but in my opinion it doesn't sound like a solenoid issue so I will defer to Gary.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



gsferraro
Veteran

Mar 20, 2023, 5:37 PM

Post #5 of 5 (1719 views)
Re: '09 Highlander rpms reving in overdrive Sign In

Hello, Have you had the car scanned for codes, These units are not the greatest, should be a U760. Question, how does the car shift when cold? Gary






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