First off I apologize if this is redundant, I've searched and what came up was a lot of other stuff unrelated. Maybe I did not search correctly.
So, about 4 months ago I noticed the RPM glitch on my automatic 3rd gen 4runner while driving on the freeway on a flat section at about 50mph. By glitch I mean that while driving maintaining consistent speed on a flat surface usually at 40 to 55mph the RPMs rarely but occasionally drop slightly, just a tick or few ticks, it feels like the power goes out for a fraction of a fraction of a second. It's subtle and I think many people wouldn't even notice.
It seemed to happen about once every two weeks and only at said speed while maintaining that speed on a level flat surface. I notice it about once a week now. It is more subtle than the tranny shifting for any reason. And the engine overall in this 4runner is stellar. It's had work done and it's been babied and my mechanic friend said it runs better than some new vehicles. For 230k miles he was amazed.
It feels like it's maybe possibly the tranny beginning to fail (even though I don't know what that feels like), or it's maybe a dirty spark plug or the Air Flow Sensor maybe? It has just recently gotten new spark plugs though and has recently had valve cover gaskets changed. This recent work did not seem to affect this issue in any way.
On rare instance it has revved up slightly when the glitch happens but almost always the RPM drops. And as I mentioned it feels like power drops like the 4runner gods turned off the switch super fast flicking it back on almost before I notice just to mess with me. All so quickly that it's hard to notice, and the RPMs only fluctuate every so slightly, a little glitch. Occasionally it is slightly more noticeable.
Over the course of the last few months of keeping my feelers on this I've noticed it a slight bit more, it's still very subtle. Toyota told me that these 3rd gens auto transmissions do this and it's nothing to be concerned about. It wasn't like this before about 4 months ago though so I don't quite trust that opinion. I am a professional driver used to driving many vehicles and I am very very in tune with this 4runner which is my daily that I've owned for 7 years, second owner.
I'd love some ideas or structure or any thoughts and I send anyone who can help nothing but pos vibes. And positive vibes to any unhelpful people too, just cause.
So, about 4 months ago I noticed the RPM glitch on my automatic 3rd gen 4runner while driving on the freeway on a flat section at about 50mph. By glitch I mean that while driving maintaining consistent speed on a flat surface usually at 40 to 55mph the RPMs rarely but occasionally drop slightly, just a tick or few ticks, it feels like the power goes out for a fraction of a fraction of a second. It's subtle and I think many people wouldn't even notice.
It seemed to happen about once every two weeks and only at said speed while maintaining that speed on a level flat surface. I notice it about once a week now. It is more subtle than the tranny shifting for any reason. And the engine overall in this 4runner is stellar. It's had work done and it's been babied and my mechanic friend said it runs better than some new vehicles. For 230k miles he was amazed.
It feels like it's maybe possibly the tranny beginning to fail (even though I don't know what that feels like), or it's maybe a dirty spark plug or the Air Flow Sensor maybe? It has just recently gotten new spark plugs though and has recently had valve cover gaskets changed. This recent work did not seem to affect this issue in any way.
On rare instance it has revved up slightly when the glitch happens but almost always the RPM drops. And as I mentioned it feels like power drops like the 4runner gods turned off the switch super fast flicking it back on almost before I notice just to mess with me. All so quickly that it's hard to notice, and the RPMs only fluctuate every so slightly, a little glitch. Occasionally it is slightly more noticeable.
Over the course of the last few months of keeping my feelers on this I've noticed it a slight bit more, it's still very subtle. Toyota told me that these 3rd gens auto transmissions do this and it's nothing to be concerned about. It wasn't like this before about 4 months ago though so I don't quite trust that opinion. I am a professional driver used to driving many vehicles and I am very very in tune with this 4runner which is my daily that I've owned for 7 years, second owner.
I'd love some ideas or structure or any thoughts and I send anyone who can help nothing but pos vibes. And positive vibes to any unhelpful people too, just cause.
