Technical clutch fluid

[Davren]

Re: gearbox oil change

Can someone help me!

Im going to attempt to change the gearbox oil (is this also known as gearbox fluid?)

Yes....oil is a fluid.

firstly the plug to drain it im guessing is under the car??? then the filler plug im guessing is under the bonnet???

The drain and filler/level plug for the JTD are on the end of the gearbox, visible through the front passenger side wheel arch. You may need to take the plastic wheel arch liner and left section of the engine undertray off to see them.

Remove the filler/level plug first to make sure it isn't seized, then remove the drain plug and drain the old oil. (If you drained the oil first and then found that the filler/level plug was seized, you'd have a problem)

When refilling through the filler/level plug, the car must be on level ground with it's wheels fully on the ground and without any jacks or axle stands under it. Under these conditions, the gearbox will have sufficient oil when it just stops flowing out of the filler/level plug hole. You may need some flexible plastic tube and a small funnel to get the oil in with.

i was recommended Tutela car ZC75 synth 1 ltr manual gearbox fluid, however would normal gearbox fluid be the same?
I have a fiat stilo 1.9 jts dynamic. thank you

No... normal gearbox oil (fluid) is not the same. Tutela CAR ZC 75 Synth is the oil recommended by Fiat, but any synthetic oil that meets or exceeds specification "SAE W75W80 EP API GL5 MIL L-2105D LEV" will do.

If you car is an 80bhp JTD it will need 1.98 litres. If it's a 115bhp JTD it will need 1.65 litres, so buy 2 litres and fill it as mentioned above..

 

[Most Easterly Pandas]

Davren do all gearboxes on the Stilo take the same oil or will my 1.4 6speed be different? Just I'm thinking of changing mine when I service it on Wednesday.

 

[Davren]

Davren do all gearboxes on the Stilo take the same oil or will my 1.4 6speed be different? Just I'm thinking of changing mine when I service it on Wednesday.

Yes.... all except the Selespeed gearbox use the same oil.

 

[flying clutchman]

If the gearchange is smooth with the engine off that suggests that the problem is clutch related. When you push the clutch down when stationary everything in the gearbox should stop. Therefore selecting first should be as easy as if the engine is off. If it's not, then the clutch is dragging.

 

[Most Easterly Pandas]

If the gearchange is smooth with the engine off that suggests that the problem is clutch related. When you push the clutch down when stationary everything in the gearbox should stop. Therefore selecting first should be as easy as if the engine is off. If it's not, then the clutch is dragging.

If the clutch was dragging it'd be grinding into gear, not just causing difficulty selecting. Why would the clutch drag only when cold if this was the case

 

[richydraper]

Why would the clutch drag only when cold if this was the case

not so much clutch drag as box oil drag...

box oil is thicker when cold it creates more drag... to prove this jack the front end up when cold and start the engine leaving the car in neutral both wheels will spin... as the engine and box warm the oil thins out resulting in less drag and the wheels will slow or cease rotating

 

[Most Easterly Pandas]

not so much clutch drag as box oil drag...

box oil is thicker when cold it creates more drag... to prove this jack the front end up when cold and start the engine leaving the car in neutral both wheels will spin... as the engine and box warm the oil thins out resulting in less drag and the wheels will slow or cease rotating

I know exactly what your saying and agree its probably the cause, but that's completely different to clutch drag. Lol.

 

[richydraper]

it is clutch drag is pretty unheard of these days if Im honest but depending on what box oil is used, it may manifest as clutch drag. But your right Im violini that clubh drag would get worse as heat increased not the other way round