You may really have trouble getting all the old oil out if you don't lift the front of the car. Examine the gearbox housing and position of the drain plug and you'll see why.

um.the drain plug is on the side,so how does lifting the front help ?

Cos it's right at the back of the housing.

as far as i remember the drain is on the side and the fill is on the other side but i may be wrong

also lifting the front at home would be problematic,i can only lift one side with my jack,not the whole front

 

 

4 minutes ago, Alext said:

as far as i remember the drain is on the side and the fill is on the other side

Correct, with the fill plug being higher, obviously.  Both at the rear of the overall gearbox housing though.

4 minutes ago, Alext said:

also lifting the front at home would be problematic,i can only lift one side with my jack,not the whole front

Buy a pair of axle stands.

Edited 26 January, 20215 yr by Wino

good idea,ill buy a pair

thanks for the help

Edited 26 January, 20215 yr by Alext

One final suggestion. The fill plug is much harder to reach than the drain plug, so should be the first one that you loosen.  You don't want to drain all the oil out and then find that you can't get the fill plug open to refill it.  Both will seem quite tight if they've never been opened before.

thanks for the suggestion

On 26/01/2021 at 19:53, Wino said:

One final suggestion. The fill plug is much harder to reach than the drain plug, so should be the first one that you loosen.  You don't want to drain all the oil out and then find that you can't get the fill plug open to refill it.  Both will seem quite tight if they've never been opened before.

 

You deffo worked on a 944 Porsche before Wino 

some update :

i have asked liqui moly support and they told me that i need this oil :

https://products.liqui-moly.com/oils/high-performance-gear-oil-gl4-sae-75w-90-1.html

and they also said that i need gl4 oil because the gl5 variant may cause issues

 

the local oil dealer told me that i have to use this oil:

https://products.liqui-moly.com/oils/top-tec-mtf-5100-75w.html

 

another one told me that i need this:

https://www.motul.com/en/en/products/gear-300-75w90

 

its getting more confusing because the first one does not have the oem G052512A2 listed as an alternative but the another liqui moly does

and the motul is a gl4/5 one