[AbhiJ]

Isnt the best way to check this is to simply put the car on a lift with the engine on?

If the front wheels turn, we definately have a problem. If they dont, we dont?

[Sutripta]

Originally Posted by im_srini

Could a 'sticky' bearing on the output shaft be causing this ?

Possible. But there should be enough auditory warnings!

Originally Posted by thoma

Because, a Mazda forum has the view that if the transmission oil is too viscous or full, it tends to act as a torque converter - Car moves forward in Neutral - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum

Viscous drag in the GB (in this case acting as a viscous coupling) should be quite incapable of moving a stationary car. Might move an unconnected output shaft. And no torque conversion without a torque converter!

Regards
Sutripta

[VeyronSuperSprt]

Originally Posted by Racer_X

Hello Guys!

Even though the car is in Neutral it is moving forward. Is this an issue with the transmission??

Thank You!

Yes, from what you have said, it looks like the clutch will have to be replaced. The reason that it moves is because of the worn clutch.

[CrAzY dRiVeR]

Originally Posted by thoma

Is this particular issue a first on Team-BHP? Does the issue vanish after the car has been driven a while? Because, a Mazda forum has the view that if the transmission oil is too viscous or full, it tends to act as a torque converter - Car moves forward in Neutral - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum

Wonder how this transmission passed the quality tests by Maruti. Or, do they really not test the product after they assemble? Is that all we are getting these days? Should others thank their stars not to have any issues by chance? Is there no way that manufacturers and dealers are given a run for the money we plonk on them? First of all, downing the transmission or opening the engine head of a brand new car is not a good indication of standards. Secondly, once this is done, I doubt whether we will get a factory fit and seal when our dealers are notorious for messing with other simpler issues.

Even if the issue is with the transmission, how can it still roll ahead with the clutch disengaged (No drive to transmission too).

Must say I'm thoroughly confused!

[Morph]

If the gearbox is a manual and in Neutral there is no physical connection between the flywheel and the output shafts - the input and output ends of the gearbox are disconnected. If the geabox oil is thick and/or very cold there could be a fluid transfer effect between the input and output side when the clutch is released (i.e. when the pedal is released). If the pedal is pressed the clutch disengages and the input side of the gearbox will eventually stop spinning.

The effect will be very slight. The dealer could swap the gearbox oil with a lighter grade if it is a serious problem.

The handbrake should always be on when parked, obviously

[KPS]

Oil being a torque converter was indeed a technology as early as 1947 was used before the auto tranny came into being.
http://www.team-bhp.com/forum/vintag...ml#post2547798

Guess with the Swift, it is a gear box problem and not fluid drive technology

Cheers

[Racer_X]

The clutch plate has been replaced and the transmission fluid has also been changed. The bearing on the output shaft has also been replaced under warranty. The car according to my cousin is now fine. But the A** has not been able to give a logical answer to the problem.

[VeyronSuperSprt]

Originally Posted by Racer_X

But the A** has not been able to give a logical answer to the problem.

The reason for the car moving forward in neutral is because the clutch does not disengage fully as it is worn out. It also happens on account of the higher viscosity of the transmission fluid but that is more in cold climates.

[coolboy007]

Originally Posted by VeyronSuperSprt

The reason for the car moving forward in neutral is because the clutch does not disengage fully as it is worn out. It also happens on account of the higher viscosity of the transmission fluid but that is more in cold climates.

I can agree with the transmission oil being viscous and cold climate but worn out clutch on a brand new car , i see no reason for it until the car was abused for test drives or personal fun or then maybe a quality check fault.


@Racer_X
You should have asked service centre and MUL for an explanation, clutch worn out on a brand new car is not good until it was a quality check fault, did your friend do PDI before getting the car?

[Racer_X]

Originally Posted by coolboy007

I can agree with the transmission oil being viscous and cold climate but worn out clutch on a brand new car , i see no reason for it until the car was abused for test drives or personal fun or then maybe a quality check fault.


@Racer_X
You should have asked service centre and MUL for an explanation, clutch worn out on a brand new car is not good until it was a quality check fault, did your friend do PDI before getting the car?

Unfortunately my cousin has not been introduced to Team BHP and did not consult me before his purchase. I think it is a quality check fault, its just that things have been worked out under warranty and nothing has been charged. I have asked him to give me the dealers name so that something could be done.

[mayankjha1806]

This is a serious problem, is he sure he has not been handed a car with was used earlier for some other purpose. Clutch plate wearing out so soon is either a manufacturing fault (Which should be caught in PDI) or he has been handed over a problematic car. Do push the dealer for explanation and if needed escalate the matters to MSIL. Hope everything now works out well for him. Do post the dealer name here as well.

Did he do a VIN decoding (Can we do that on a Maruti car?)

[Joe-Ker]

Originally Posted by livyodream

Jack up the vehicle and check if the front tyres move on neutral.

Originally Posted by Racer_X

Unfortunately my cousin has not been introduced to Team BHP and did not consult me before his purchase. I think it is a quality check fault, its just that things have been worked out under warranty and nothing has been charged. I have asked him to give me the dealers name so that something could be done.

Please confirm with your cousin if the car was moving ahead earlier in the following conditions
1) gear in neutral, clutch pedal not pressed
2) gear in neutral, clutch pedal pressed
3) First gear, clutch pedal pressed

I cannot imagine a malfunction where all three happens. only worn clutch + some weird issue like GB acting like torque converter due to oil viscosity can explain this on a rather new car.

Its normal for tyres to rotate slowly when jacked up in neutral gear with clutch not pressed (). seen cars on a.s.s premises displaying this but nobody is alarmed, but this should not be strong enough to move the car (SA said its normal).

[Morph]

This is still a mystery to me.

A worn clutch will either not disengage properly so that gears cannot be selected, or it will slip when in gear - the engine revs will rise but the car will not gain speed.

Unless thar car is in gear the input and output shafts are not connected in any way. The clutch can be brand new or totally worn out - there is no physical metal on metal, or gear meshing with gear connection between them.

So replacing the clutch shouldn't make a difference ? Or is there something else on a Swift I'm missing ?

[ani_meher]

I have noticed similar in my Beat diesel too. Doesn't happen every time, but two times when I was stopped with engine shut off, no movement/no brakes required. When I started the engine, car very slowly started moving forwards! Couldn't replicate it at will though. Wonder what could be the reason.

[Joe-Ker]

Originally Posted by ani_meher

I have noticed similar in my Beat diesel too. Doesn't happen every time, but two times when I was stopped with engine shut off, no movement/no brakes required. When I started the engine, car very slowly started moving forwards! Couldn't replicate it at will though. Wonder what could be the reason.

Could have been a very slight gradient, the vibrations of the engine might have started the car rolling. Eliminate this possibility before getting alarmed.