[Dancingdad]

Post 7 in this thread.
Think it should do for you, does show principle steps.

Please help me check transmission fluid level

Either I've overlooked it or there is no info out there about how to check the transmission fluid level (AT) on a Renault Scenic 2.0 16v '01 that doesn't have a dipstick. I've got the car booked in for a transmission service before changing the cambelt because I don't want to spend big $...

www.renaultforums.co.uk

 

[Dancingdad]

Not to the exact degree but hot oil is.... different volume when hot, if you fill cold, you will have overfilled.
Take it for a run first, get the oil hot and should be okay.

 

[Dancingdad]

Don't forget, engine running when checking level.

 

[Dancingdad]

Difficult to tell.
Unless there is a leak, I would not expect a gear box to lose much oil, if any.
Based on that, if 3 came out and 3.5 went in then about half a litre too much so would expect that to overflow.
But can't account for the rest.
Sure you were checking against the right drain plug.... the inner IIRC but check with Haynes, one drains to level, the second drains completely (or as much as wants to come out)...sorry of that seems basic but silly mistakes do happen.
I'd suggest not driving tonight, in morning (or tonight if you feel like it), car on flat, let it tickover till gearbox seems hot.
Then repeat the drain test and see if any comes out.... if none, top up a little and repeat.
End of the day, only that above the drain level should come out and that should set the level.

 

[Dancingdad]

I have this problem with a 30 minute drive to get everything up to temp with a potential 1litre overfill.
Not sure of the answer but....
Perhaps now that you know the level is something like right, run it, go for a drive, get it hot.... then do not drain, just check level, top if needed/nothing showing, check and repeat if needed?
Re the fault..... wot LVR says

 

[Dancingdad]

I wonder what you guys think of the "oil cleaner" products you can buy, that claim to clean out the auto box? Or should we just change the fluid?

I have an automatic cynicism whenever I hear of products that claim to clean oil..... unless it includes a team of guys with a filter pack, most it is going to do is "enhance" the structure in someway, probably minor.
Almost as bad as engine flushing oil that used to be popular, cheap oil with detergent in it, guaranteed to FUBAR the new oil you put in after flushing.