Hi.. I've just checked my GB oil level after getting home and letting it sit for an hour .. the level after checking 4 times, is 5mm above the Full indicator line.. Is there any issue i should be worried about, Should i get the excess drained.

 

Have you or someone else filled the box or topped it up?

 

Someone else did the oil change.. I paid =(

 

To much fluid can cause it to foam which doesn't lubricate or cool as well.
I'd take it back and get them to do it right, or you can get a syringe and a long straw and suck it out the dipstick hole,

 

What box? I have heard previously that its good to over fill the 5 speed slightly. Covers 3rd or something like that. Do a search.

 

Quick search:

https://www.scoobynet.com/general-te...arbox-oil.html

Sure there are more.

 

Sti 02 6sp