Mud-club

Vehicle & Technical => Discovery => Topic started by: Matbrown on January 12, 2007, 10:58:17

Title: 300Tdi Auto Question.
Post by: Matbrown on January 12, 2007, 10:58:17

Just a quick Q about autos, i'm new to them so not sure if i have a problem or it's my driving!
When just driving on roads at normal speeds the revs sometimes jump up suddenly then settle as if the clutch was slipping when changing gear or is it just my pedal control?



Mat.

Title: 300Tdi Auto Question.
Post by: beast5680 on January 12, 2007, 23:03:34

the engine will sound slightly like its slipping the clutch as effectively its doing just that as it builds speed to change up to the next gear, if you hold it at a constant rpm and drive a flat road you,ll hear it .
if your not used to it it does sound odd when they change gear

Title: revs?
Post by: rommelsraider973 on January 13, 2007, 05:23:50

Is it all the time? Could be a loose connection on your alternator? Just a thought mate!! :wink:

Title: 300Tdi Auto Question.
Post by: Matbrown on January 13, 2007, 12:35:37

Not all the time, just done it a few times.
It's not the standard gearchange slipping noise, when it goes to change up a gear the revs will increase briefly.



Mat.

Title: 300Tdi Auto Question.
Post by: Matbrown on January 18, 2007, 21:30:34

What is there on an auto instead of a clutch?



Mat.

Title: 300Tdi Auto Question.
Post by: bezzabsa on January 18, 2007, 21:49:19

viscous coupling....in other words - try stirring cold treacle - them try again with hot treacle...lol

Title: 300Tdi Auto Question.
Post by: Matbrown on January 20, 2007, 14:54:07

Could this be developing a fault, does it share the same fluid as the gearbox?
As although it doesn't effect the driving much it's very annoying!



Mat.

Title: 300Tdi Auto Question.
Post by: Xtremeteam on January 20, 2007, 15:42:50

Quote from: "bezzabsa"

viscous coupling....in other words - try stirring cold treacle - them try again with hot treacle...lol

not quite but ill explain in a bit.

the engine drives one side of the torque converter,this then spins with the fluid inside,on the inside of the TC is vanes which spin the fluid like a pump,as it moves its goes against the otherside of the THC which also hase vanes but pointing the otherway,thus giving it resistance,as it spins the fluid moves faster & gives more resistance,in the middle of the TC is the stator which then turns the fluid back in the oposite direction & starting the process all over again

Title: 300Tdi Auto Question.
Post by: Matbrown on January 23, 2007, 11:25:53

So would a fluid change help?



Mat.