accelerating downhill
Thread Starter
Driver
Joined: Mar 2009
Posts: 134
Likes: 0
From: pa
accelerating downhill
this has happened me a couple of times since getting the gs300 awd a few months ago. so i'm going downhill...at probably 35-45 mph and i may have tapped on the accelerator or may have been just cruising but the transmission jumped up a gear or so... did not feel natural. the rpm went up and the engine got louder....
is this normal? never experienced this on any of my other auto transmission cars - accord, jetta, crv, etc.
is this normal? never experienced this on any of my other auto transmission cars - accord, jetta, crv, etc.
yup, that's drop in gear to use engine braking. it happens when you go downhill (car starts to accelerate) and then you tap on the brakes. the computer system is smart enough to sense that and downshift, avoiding using excessive brakes
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Lead Lap
Joined: Mar 2008
Posts: 578
Likes: 2
From: Connecticut
i noticed the sametihng when im going 40mph (around there) going to work and i hit this miny hill and i try and slow down and the needle goes up on the rpm and engine gets loud. thank god people say its normal i feel better now haha
when you put things to the extreme, it could always be a problem.
engine braking won't hurt the engine nor the tranny, as long as it's done correctly. if every time you down shift a lot and rev the engine to very high rpm, i am sure over time it will put extra stress on the engine / tranny.
but if you are doing it correctly, just downshift say a gear and the rpm jumps 500rpm, it's not going to hurt anything
that applies to both auto and manual
engine braking won't hurt the engine nor the tranny, as long as it's done correctly. if every time you down shift a lot and rev the engine to very high rpm, i am sure over time it will put extra stress on the engine / tranny.
but if you are doing it correctly, just downshift say a gear and the rpm jumps 500rpm, it's not going to hurt anything
that applies to both auto and manual
Lexus Test Driver
Joined: Oct 2005
Posts: 8,804
Likes: 140
From: MA
Some people driving stick shift will over down shift, revving the engine way pass 4 to 5000, I notice that many drivers from 3rd world countries do this for some reason. Maybe it is a way to save on brakes, but I would think it’s cheaper to replace the brakes than the power train. Another thing I notice is that they tend to shift a auto transmission into neutral every time they stop.
Some people driving stick shift will over down shift, revving the engine way pass 4 to 5000, I notice that many drivers from 3rd world countries do this for some reason. Maybe it is a way to save on brakes, but I would think it’s cheaper to replace the brakes than the power train. Another thing I notice is that they tend to shift a auto transmission into neutral every time they stop.
putting it on neutral, it can actually be a good habit in places with a lot of slopes. for example in hong kong, where roads are narrow and sloppy, i believe when you learn driving, they ask you to put the car in neutral when you are at the light.