Cars rolling uphill when in neutral.

  • Thread starter Thread starter Barso
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JUST one thing? Why are you people stopping? There are I think massive holes in the physiscs of GT...but GT still has the best of them. Are you not more bothered about the grass magnet or the uphill braking? If you are in neutral in a race then you are at fault. This is a game not a driving test simulator!
 
I always thought that cars rolled forward/backward depending on inclination in manual transmission cars. While when you let go of brake in an automatic transmission, it would slowly inch forward.

I'm pretty sure this was fine in GT4. It's pretty realistic on the IS-F from what I've played in the Japanese demo for GT5:P. :)
 
I press on clutch, and the car i was driving never stop, when I let go of clutch, then car stop. hmm.
 
Okay. In a manual transmission car with the clutch engaged, the gear lever in neutral, and the drive wheels lifted off of the ground, I'm sure it's possible for the drive wheels to spin slightly. Because the clutch is engaged, the gears are spinning with the engine, and although the output shaft isn't connected to any of them, the sloshing of the transmission fluid could generate a force strong enough to slowly spin the output shaft and spin the drive wheels, like a fluid coupling.

However, for this to happen with the drive wheels on the ground would require a very viscous transmission fluid, far beyond the levels considered "normal," I would think. Barring physical evidence, I'm going to assume that if a car could do this, it wouldn't make it to the end of the block without overheating the transmission.

thedeester1
JUST one thing? Why are you people stopping? There are I think massive holes in the physiscs of GT...but GT still has the best of them. Are you not more bothered about the grass magnet or the uphill braking? If you are in neutral in a race then you are at fault. This is a game not a driving test simulator!
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Have you never gotten bored while playing GT? Never felt the urge to screw around in time attack mode? Although I wouldn't personally place much value in the flaw described in this thread, any major flaws that are present in the physics engine -- even if they're discovered while doing things other than racing -- compromise the pursuit of realism. And for a game that calls itself "the Real Driving Simulator," you better believe that people are going to expect it to behave realistically in all driving situations.

Oh, and sorry, but Gran Turismo does not have the best physics around. It's not a matter of opinion; the gap between it and good PC sims is far too wide.
 
I can testify that with the wheels off the ground, they will spin, at least on some cars. A couple years back my axle broke on my car. After replacing it and the brakes i started the car still on the jackstands, and to my surprise the front wheels starting spinning. Actually it scared me a little and I think I made sure the transaxle was in neutrel about ten times.

Anyways, pointless story but they will spin while in the air. As far as on a slight incline or even flat ground, it's never happened to me. And yes, the game does have many small problems like that, but they aren't to difficult to learn to live with.
 
I don't know about cars rolling up hill, but how about this:

'Accellerating into the back of a car when you in its slipstream - even when your free wheeling!'

Now how incredible is that!? :sly:

(BTW, it has happened to me many times. 👍)
 
danjama
I'm going to have to back up chronos here, i work in a garage as well as a mechanic and everyday i have cars up on the ramp and about 7/10 the wheels will rotate in neutral gear while in the air. It's just as he already described (quite well put as well i'll add), unless the clutch is depressed, the flywheel is in contact with the clutch friction plate and therefore a small amount of drive is being transferred...
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Thats fine and dandy, that small amount of drive (from an engine the likes of that found in a fiesta) is NOT going to pull a 2000+lb car up a hill.
 
lol @ this thread...

to clear it up.

An Automatic car may creep forwards in neutral depending on how high the tickover is.

A manual car will not do this. If you jack the driven wheels up yes they will spin round but even on a level ground as soon as they make contact with the floor they will not spin.
 
I have to back this up, i never thought it would happen either. I was with a friend in his 07 ford focus manual gearbox, we parked up outside my friends house whose drive has a slight incline, about 15%, the car was in neutral with the engine running and it was slowly going up hill. We were thinking WTF!?! But as i say, i'm glad this topic has been bought up, as it shows it CAN happen.
 
But cars sliding sideways from rest on grass, or rocking back and forth in neutral. Well as scotty would say. 'Ye canny change the laws of physics'

The same holds true irl. I've not yet been blessed with a car that can propel itself forward in neutral when the clutch is functioning as intended. ie it disengages when i place the funny wiggly stick in its wiggliest position and take my size 9 off the pedal.

Teeny weeny niggly bugs, which will hopefully be resolved in the final version
 
OMFG, last night we had drinks and stuffz and then, then the car moved up the hill.
weeeeeeeeeeeeeeeeeeee!
 
lol same as above and as I said before... in a manual car it wont roll forward on a level let alone up a hill.... jeeez
 

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