Wondering if you can provide a bit of support.
My Astra (above) have recently start making a whirring noise in 4th and 5th gear. It sounds like you can hear the gears spinning in the box but no grinding or splipping.
My dad has taken a listen as he is a technician for BMW and suggests the easiest thing to do is source a new box or risk elaving it to develop some more.
Could be a diff bearing or drive shaft bearing??
Anyway, having a look at the oil level seems fine and indented on the top is F23 and the engine is a x20xev. Its a 2.0 petrol astra G Ecotec engine and i cannot locate or find any info relating to which boxs will fit as a replacement?
Will the vectra B 2.0 ecotec F23 box fit directly?
Will any other?
Do i need to just be lucky and find a breakingSRI 2.0 16v?
please please help and provide some expertise. I know there are different indents SC and SH that mean the final drive ratio is different. Will a F23SH or F23SC fit the same bellhousing and block and engine mounts?
Just need to know what to look for as there is so much variation.