Good Afternoon, I purchased a 2008 GX470 with around 150K on it a few months ago. I noticed that it seems to studder and hesitate around 2K-2.5K RPM when accelerating. It doesn't happen all the time but the majority of the time it does. I initially thought it was a mis fire so I changed the spark plugs and coils however it still persists. I'm thinking it might be the transmission hesitating but I'm not sure. Any help or guidance to trouble shoot would be appreciated! Thanks!

 

Also following this. I feel like this is a common occurrence for my 06 gx470 I just changed plugs today. The engine runs smoother and better but no change in the bog/stutter it has under load. hope we both figure this one out

 

Have you tried plugging in an OBD2 code reader? I would clean the throttle body with carb cleaner to see if that improves things.

 

have not tried OBD2 plugged in unless it’s to clear a P0430(catalytic system efficiency below threshold bank 2) code that pops up every 1-2 months.
I’ll have to check out the throttle body and clean it. Could that CEL light code be a concern or correlated?

 

I plugged in an OBD2 port however I didn't see any codes. I'll try cleaning the TB with carb cleaner!

 

This might be smarter.