Whoops, I broke my gearbox.

[Adamdavid899]

Okay so I decided yesterday * smartly* .. to change the oil in my gearbox. Which went fine... Untill this morning.

Now it crunches from first to second slightly..

Have I used the wrong oil?

Would too much oil cause this..

I used gl4 80w 90 full synth... I've got a feeling it's too thick.

Or entirely the wrong oil!


I couldn't find out what gear oil it used, now I'm going to be ordering some genuine stuff from aks tuning if it will sort my problem. I've just bought a bunch of stuff off them to do a cam chain tensioner job and was thinking of buying the gear oil at the same time. But I cheepskated and now I'm having an issue :/ it does go away when it warms up which leads me to believe it's too thick.

It was crunching mildly on a cold start this morning but after about 15 minutes of driving it seemed to clear up but it's still a bit snappy from first to second like it's on the verge of clipping the gears.

Please help! I don't want to toast my box using it like this.

I think I might of over filled it slightly by 300 ml. As i fully drained it and when filling it was coming out the level hole after only 2l. So I shoved an extra 300ml in.





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[prt57]

About 3 years ago as part of another job at a transmission specialist I had the gearbox oil changed on my Mk 4 Golf. It was on over 100k miles so seemed like a good idea. The place did not use genuine vag oil but Castrol instead. More than happy with Castrol as a brand but maybe the viscosity was different. However, as winter approached, the gear change when cold was so bad, the car was almost undriveable until it warmed up.
So I had my local VW garage change it for the genuine oil and everything returned to even better than before.

I watched the chaps at the transmission place put the Castrol in and part way through they turned the wheels telling me that people often underfill the gearbox because there is a second area that holds oil that is not filled just by adding oil. It needs the cogs turning to slosh oil into this 2nd area before checking the level again and adding more oil.
Whilst your gearbox may be different to my Mk 4 Golf , the idea matches with the fact it seemed to take less than expected when you filled up.
Definitely get the correct VAG oil into the gearbox and you’ll need to get as much of the dodgy oil out as possible.

 

[ab1702]

Sounds like you may have overfilled it but also you should have just used genuine vag oil as I’ve seen a few posts on here over the years where people use different oils for gearboxes, transfer boxes, diffs etc and then have problems straight after.
Get some genuine oil from Audi, TPS or there’s a dealer on Facebook called *** which will probably be the cheapest for genuine parts, I’ve used them a few times.

 

[Adamdavid899]

Thanks guys, I think what I'll do is try taking the fill plug out and drain off any excess and see what it's like tomorrow morning. It will have had chance to circulate now so if there's any second chambers etc those will be good.

I did a short run this morning to take the kids to school and it did it the whole time. Now I've properly warmed it up it's been fine since but if it's going to do it when cold then the oil just must be too thick.

It's £75 for 3l of genuine stuff which is fairly expensive!



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