[Franksin]

Just bought myself a GTC 2012 with 100k miles on it. Not sure how many times the previous owners changed the gearbox oil, if at all.

Which gearbox oil should I choose, also how much do I need for an oil change?

Cheers,
F

 

[Big Steve 06]

Gearbox oil is non Serviceable, leave it alone. Unless you like a placebo effect.

 

[milek]

It is always good to change the oil, especially in the problem-prone M32 transmission. In that gearbox should pour more oil than the official specification says, but don't remember how much.

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[Ant21]

M32 - Fuchs Titan Sintofluid 75w/80
Not sure on the quantity for the Astra J, but I know you'll need 3 litre bottles.
It'll be between 2.5-2.8 fill.

 

[Big Steve 06]

Please people if the m32 is gonna fall then a non Serviceable oil change is gonna have no effect on the outcome. It will fail anyway. Placebo. Spend the £30 on some wind deflectors 😁

 

[Ant21]

Oil degrades, leading to less protection & therefore wear. Pretty cheap service item to help prolong the life of the box...
Then again, if you wish to spend money on some wind deflectors then that's your choice.

 

[daywalker]

Fuch Titanfluid as Ant21 said and also to put about 3 litres in which is what most M32 gearbox builders will tell you. Make sure you can undo filler plug first before draining oil.Hopefully as its a 2012 model it might have the modified end case with a bigger 6th gear bearing and the oil channel that supplies oil to it.

 

[Big Steve 06]

Best way to look after the gearbox is not to abuse it, you can change the oil every month but just that alone will not guarantee longitivity. It just a placebo effect. Your box will give out and you'll be saying "i don't know why this has happened as I changed the oil regularly". Spend ya time and money on something else 🙄

 

[milek]

Big Steve, please give up. You are wrong. Let the author of the topic listen to the advice of someone who understands better.

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[Big Steve 06]

Big Steve, please give up. You are wrong. Let the author of the topic listen to the advice of someone who understands better.

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Yes boss.