Hidden_Hunter
Needs more IceBone
- Joined
- Oct 7, 2006
- Messages
- 8,612
- Location
- Melbourne, Australia
- Car(s)
- '13 BMW 125i, '26 Buick Standard Six
still waiting for a good reason to do it...
hmmm, interesting. So does the motor just run on the momentum of the crank/axle ? So combustion is *stopped* since there is no fuel injected into the cylinder?
It is true what Ottobon said - leaving a newer manual car in gear while decelarating uses NO fuel.
This thread sums up most of the reasons why I don't want to buy an automatic
The 1+ ton moment of the car moving at 30+mph will force the engine to keep moving, the drag from the engine pulling on the closed throttle plate is what causes it to slow down.
Saving gas AND saving brakes! Sounds like a good deal to me.
But reading about the engine being "forced" to keep moving while drag/friction slows it down....is that "bad" for the engine in anyway?
But eats up your clutch faster and/or your syncros in your tranny. Gas and brake pads are far easier to change than either of those.
The biggest danger I see is accidentally shifting into Reverse or Park while on the move.
If you have an auto try it out for yourself In P the engine feels like it does in D while brakes are applied in N it feels like there is no load on the engine at all. It's hard to explain but the vibration feels different through the body of the car in P and in N with brakes applied.Um, there's no difference between P and N except that a parking pawl is shoved into the gears in P. So I don't know why you'd say your engine is working harder in P.
Depending on speed it won't do anything, I've accidentally done it before and nothing will happen basically.
If you have an auto try it out for yourself In P the engine feels like it does in D while brakes are applied in N it feels like there is no load on the engine at all. It's hard to explain but the vibration feels different through the body of the car in P and in N with brakes applied.
P causes no more load than it does in N. I have three automatics here and NONE of them do anything different in P than they do in N with the brakes applied.
If your car is shuddering while in park and it doesn't in neutral, there's something wrong with it.
Um, not likely. I've got a Borg Warner M66, a GM 4L80E and a Nissan RE4R01A. None of them do what you describe, and their modes of operation are all different.
I think you are severely mistaken in your perception.
Um, not likely. I've got a Borg Warner M66, a GM 4L80E and a Nissan RE4R01A. None of them do what you describe, and their modes of operation are all different.
I think you are severely mistaken in your perception.