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Gearbox oil change

2003 - 2009, roadster, coupe, facelift
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DashBedrock
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Gearbox oil change

Post by DashBedrock » Thu Feb 22, 2018 6:24 pm

After changing my own engine oil and filters etc last week, I now fancy giving the transmission oil a go.
Its a manual coupe and wondered if anyone can direct me to a useful guide on how to do this. I've tried searching the forum with no success and couldn't find anything specific to the Z4 on YouTube.
Thanks
Andy

eddiemunster
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Gearbox oil change

Post by eddiemunster » Thu Feb 22, 2018 6:47 pm

I'm going to do mine next week, although I haven't looked into how it's done yet, but what I can advise is that you wear a mask/hold your noise as transmission oil has a truly repugant smell..... particularly if you warm it up for easier re-filling!! :D

biojo
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Gearbox oil change

Post by biojo » Thu Feb 22, 2018 8:48 pm

if its manual gear box, its plug on side make sure that comes out then undo drain plug

Not much else to it tbh, get a new washer, then fill till it over flows

Scooba_Steve
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Gearbox oil change

Post by Scooba_Steve » Thu Feb 22, 2018 9:07 pm

Get under and have a look. Some boxes have both drain and fill plugs, others only fill. Take it for a drive to get the box warm. I use a length of tubing and funnel from the engine bay to fill, undo this plug first. My box took about 1.4 litres and you'll need a hex key, but I can't remember the size, was quite chunky. If you get new plugs first then you can obviously measure and some come with integrated washers.
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