gearbox oil overfill?

[L2VXR]

Im about to change my gearbox oil to royal purple syncromax and know that it should be refilled to the factory recomended level via the reverse lamp switch,but i seem to remember someone saying that its a good idea to overfill the box by about 1/2 a litre is this right and if so where do you add the extra fluid into the box? (6L VXR Monaro)

[snowwolf]

L2VXR said:

Im about to change my gearbox oil to royal purple syncromax and know that it should be refilled to the factory recomended level via the reverse lamp switch,but i seem to remember someone saying that its a good idea to overfill the box by about 1/2 a litre is this right and if so where do you add the extra fluid into the box? (6L VXR Monaro)

As far as I know, fill up through the normal level plug, even though it say on the box "do not remove this plug" think it says that because if you are just checking the level, you will loose the extra 1/2 litre that is in the box.

So yes, fill up through normal level plug, put plug in and then put 1/2 litre in the reverse switch hole.

ps it will be a hard job to do if you have not got a car lift.

Edited by snowwolf on Monday 29th March 22:55

[L2VXR]

Ok cheers, I'll have to have a closer look under the car ,the instructions I have say the the reverse lamp switch is the "normal" level so thought I needed to add the extra 1/2 litre over this level

[monkfish1]

L2VXR said:

Ok cheers, I'll have to have a closer look under the car ,the instructions I have say the the reverse lamp switch is the "normal" level so thought I needed to add the extra 1/2 litre over this level

Incorrect. It is has snowolf describes.

[L2VXR]

monkfish1 said:

Incorrect. It is has snowolf describes.

Thanks for confirming thisthe Pontiac GTO manual I have must already allow for the extra as there's no mention of the normal fill level bung just straight fill to the lamp switch