Been driving for over 35 years and have not experienced this before. When stopping at a light with the brake applied the RPM's occasionally will increase by 100-300 for no reason and the vehicle will begin to move. I've clocked 3000+ miles on it and it is very repeatable. Anyone else experience this? It caught me off guard the first few times this happened. So what feels like should be normal brake pressure to hold a stop is not sufficient. Excess pressure is required and in stop and go there is a noticeable fatigue.

 

If the vehicle is under warranty, take it back to the dealer since the "surge" is consistent, take the service rep for a drive and show them.

 

Obviously.

 

I've noticed that mine will creep forward in traffic if I'm not on the brake harder than my other vehicles require. I'm not sure if it's just a softness to the brakes at light pressure, a torque converter with a slightly lower stall speed than others, or some combination of both. I got used to it fairly quickly. Hard to say if what you are seeing is the same without driving it.

Mark

 

I felt the same way when I first got my truck. Felt like I had to press down harder on the brake at stops than I was used to it. Used to it now.

 

Strange to see this, but I noticed this as well when I first got my 2020 GX similar to what @ScaldedDog and @xychromo described. On mine, it wasn't an engine surge, more like the brakes aren't gripping as much when stopped and I have to stay on the brake pedal harder then my other cars when stopped, otherwise I would get a little creep. Previously, I had a Toyota Land Cruiser, and my wife had a Lexus LX470, and we did not experience this in those vehicles which I thought would be similar to the GX. Regardless, while both myself and my wife noticed this on the GX, we got used to it very quickly and simply apply more brake pressure when stopped.

I'm wondering if this has something to do with the type of brake pad on the GX, or just different brake system?

Lee

 

Thanks for the helpful replies.

It sounds like we are experiencing the same thing. It's very concerning - a given amount of force that is used to stop the vehicle is not enough to keep it stopped because something unknown happens and causes the vehicle to move again. I reported it on NHSTA's site as a safety concern. I expect nothing to come of it nor do I expect the dealer/Toyota to do anything about it based on my experience with them.

 

maybe a lower ratio on the booster. lexus does reductions like this elsewhere to stretch out the design life.

 

Haven't experienced as you describe it, but the when in the GX I have to press harder on teh brake to hold it at litchis, stop signs or traffic compared to other vehicles, but I have learned/adapted to teh way teh GX drives/behaves, its an old school design/product and that's what I love about it, kind of simple but effective.

 

I haven't experienced what the OP described with my 23 GX (yet) but have experienced something similar with other automatic transmission cars I've driven. It felt like the car shifted gears right at the moment I wanted to stop.

 

^^there are many different sensors feeding into calculations that then adjust depending on the various algorithms. for example, mixtures or throttle body resistances getting out of range can cause the vehicle to increase rpms. often happens when stopping when there is a slower reaction in the ignition system than the algorithms want. attempts to prevent stalls. there are 100's of other reasons the rpms can surge short term.

 

@thatwasbrilliant mind Dming me the NHTSA number? Was it 11578320? having the same issue with my 22 GX and also filed the NHTSA. See the latest thread I started.

Curious if your issue ever got resolved.