What grinds my gears?

[CoastieRon]

I was in the fine state of West Virginia last night to do a little gambling last night, and I had missed a turn in a parking lot and stopped, put the car in reverse, then put the car in to drive rather quickly (maybe not a 100% complete stop) and started noticing a grinding noise for a few seconds when I hit the gas. It eventually fizzled away after 5 seconds or so but I've been driving manual cars for the past 8 years. This obviously doesn't sound normal, and with a 2015 with less than 5k miles, has anyone else experienced something like this? Just a grinding of the gears or something larger I should be concerned of? Haven't done any serious off-roading yet...

 

[philsey]

Can you repeat the symptoms sober?

 

[jbstrd]

I was in the fine state of West Virginia last night to do a little gambling last night, and I had missed a turn in a parking lot and stopped, put the car in reverse, then put the car in to drive rather quickly (maybe not a 100% complete stop) and started noticing a grinding noise for a few seconds when I hit the gas. It eventually fizzled away after 5 seconds or so but I've been driving manual cars for the past 8 years. This obviously doesn't sound normal, and with a 2015 with less than 5k miles, has anyone else experienced something like this? Just a grinding of the gears or something larger I should be concerned of? Haven't done any serious off-roading yet...

You didn't happen to hear any beeping did you? If you are rolling backwards while in drive, your brakes will activate and there is a beeping/clicking noise heard. This feature is to prevent the vehicle from rolling back while starting out on a hill, but you can induce it on a flat surface by doing what you did. Could this have been it?

 

[CoastieRon]

YES! [MENTION=54404]jbstrd[/MENTION] dude you just this thread that much shorter lol thanks. Did not know that was a feature but glad it isn't anything serious.

 

[CoastieRon]

Can you repeat the symptoms sober?

Haha busted

 

[jbstrd]

YES! [MENTION=54404]jbstrd[/MENTION] dude you just this thread that much shorter lol thanks. Did not know that was a feature but glad it isn't anything serious.

Good to hear. Kind of surprises you when you don't know what it is. It works quite well when starting on a hill while wheeling or attacking those urban hills.

Another thing you should experience is the panic braking. Not sure if you have felt it yet, but if you go from the gas to the brake and brake fast/hard enough, this panic braking will take over. It is an interesting feeling, almost like the pedal is going to the floor on its own. Initially, if you are not expecting it, it feels like the brakes are failing. In reality, the vehicle is braking harder on its own. Every time you push the brake pedal, you will hear a squishing noise. This is the system storing pressure in case of an emergency braking situation.

This is obviously in laymen's terms, but you get the idea. Go to an open parking lot and try it out.

 

[jbstrd]

Oh, and when you go out to your garage and hear your 4R buzzing while it's turned off, that is normal. Contrary to popular belief, your vehicle is not getting ready to blow. This is a fuel evap leakage check performed every once in a while as your vehicle is sitting.

 

[wfo9]

Take a corner at high speed and that will really freak you out. First time, it almost made me crash as I tried to react to it. I personally don't like the way Toyota implements stability control. It's seems very awkward and harsh.

 

[Jeremy556]

Take a corner at high speed and that will really freak you out. First time, it almost made me crash as I tried to react to it. I personally don't like the way Toyota implements stability control. It's seems very awkward and harsh.

Have you done a zero point calibration? Whenever I change ride height the VSC is terrible until I do one.

 

[CoastieRon]

Have you done a zero point calibration? Whenever I change ride height the VSC is terrible until I do one.

[MENTION=78273]Jeremy556[/MENTION], this is me being ignorant but is the zero point calibration for all vehicles or only certain models and features (KDSS, XREAS, etc)?

 

[1engineer]

[MENTION=78273]Jeremy556[/MENTION], this is me being ignorant but is the zero point calibration for all vehicles or only certain models and features (KDSS, XREAS, etc)?

All of them but you don't need it. You know you need a ZPC when you go through a turn fairly slow but VSC activates when it shouldn't. Usually you need to do it after lifting or sensor replacement. You just had your hill assist kick in because you didn't come to a stop backward before you wanted to go forward. Shame shame lol.

 

[KidVermicious]

Don't do that.

 

[STX4Runner]

Take a corner at high speed and that will really freak you out. First time, it almost made me crash as I tried to react to it. I personally don't like the way Toyota implements stability control. It's seems very awkward and harsh.

This. I was flying around a corner once on a cliff road (paved) and it didn't like something I was doing. Kinda freaked me out, but I don't usually drive aggressively enough to make it kick in.

Back to the OPs original question. I've always thought it was bad to shift from reverse to drive while still rolling backwards. Don't know if that's just an old wives tale or what.

 

[CoastieRon]

Don't do that.

Never

 

[tristero]

Take a corner at high speed and that will really freak you out. First time, it almost made me crash as I tried to react to it. I personally don't like the way Toyota implements stability control. It's seems very awkward and harsh.

My fiancée is afraid to drive my T4R because of this. It's surprised the crap out of both of us when we're up in the mountains on the curvy roads. 90% of the VSC going off she was riding with me and I didn't take the corners too fast at all. I was starting to wonder if altitude may affect the sensor as it usually happens in the 5000-6000' range, [MENTION=66316]1engineer[/MENTION]?

 

[jbstrd]

My fiancée is afraid to drive my T4R because of this. It's surprised the crap out of both of us when we're up in the mountains on the curvy roads. 90% of the VSC going off she was riding with me and I didn't take the corners too fast at all. I was starting to wonder if altitude may affect the sensor as it usually happens in the 5000-6000' range, [MENTION=66316]1engineer[/MENTION]?

Not sure if altitude affects it or not, but mine has been overactive since I purchased it. I have even attempted ZPC's on my own and the dealer has claimed to have done it under warranty twice. Still overactive in turns, at not-too-fast speeds, on dry pavement.

I lifted my rig at 100 miles, so not sure if it did it in stock form. From researching, it seems to affect KDSS equipped rigs more. Sadly, I have just learned to cope with it.

 

[Jeremy556]

My fiancée is afraid to drive my T4R because of this. It's surprised the crap out of both of us when we're up in the mountains on the curvy roads. 90% of the VSC going off she was riding with me and I didn't take the corners too fast at all. I was starting to wonder if altitude may affect the sensor as it usually happens in the 5000-6000' range, [MENTION=66316]1engineer[/MENTION]?

Do a search here for Zero Point Calibration. It is easy, takes a couple of minutes, tops. It doesn't care about altitude, it cares about speed, steering angle, yaw rate, etc.

When mine is calibrated, I can go around corners with my tires howling in protest and beginning to slide and the VSC doesn't care. When it is out of calibration, every switchback turn it kicks in, even at a grandmother's pace.

 

[tristero]

Do a search here for Zero Point Calibration. It is easy, takes a couple of minutes, tops. It doesn't care about altitude, it cares about speed, steering angle, yaw rate, etc.

When mine is calibrated, I can go around corners with my tires howling in protest and beginning to slide and the VSC doesn't care. When it is out of calibration, every switchback turn it kicks in, even at a grandmother's pace.

I haven't got around to the calibration yet, not because I'm lazy, well sort of, but because I haven't had any issues around sea level. I'll do it tomorrow and see if it helps on our next trip.

 

[1engineer]

My fiancée is afraid to drive my T4R because of this. It's surprised the crap out of both of us when we're up in the mountains on the curvy roads. 90% of the VSC going off she was riding with me and I didn't take the corners too fast at all. I was starting to wonder if altitude may affect the sensor as it usually happens in the 5000-6000' range, [MENTION=66316]1engineer[/MENTION]?

Not height. Curves. Do a zero point calibration.

 

[Bevo]

Any one else think of this when they saw this thread?

Nope, nobody thought of that at all.