cat007 Member 236 Member For: 6y 4m 20d Posted 12/05/21 07:51 AM Share Posted 12/05/21 07:51 AM Could be as much as 300ml difference in volume from cold vs hot.IIRC when I replaced my fluid, it was about 5.5L to fill it according to spec. Don't quote me on that. But 4.5L seems too little... Link to comment Share on other sites More sharing options...
adams355 Member 529 Member For: 7y 8m 23d Gender: Male Location: Brisbane Posted 12/05/21 08:07 AM Share Posted 12/05/21 08:07 AM The point is it needs to be full, you can guarantee that doing it when cold. I have heard of a lot of transmissions failing because the fluid was dirty or it didn't have enough fluid in it. I have never heard of a transmission being over filled, well at least not a ZF because you can only get a certain amount in before it will drain out. I'm not here for forum kudos, I worked as a mechanic years ago and still do all my own work at a friends shop. We went through this all 3-4 times last year filling and refilling the ZF. We followed the ZF procedure on 2 different occasions and when I drove the car hard it went into limp mode. A transmission shop recommended filling when cold so I tried that and got a litre in or so. Had no dramas since x 2. You cant guarantee the conditions to be perfect on every transmission with the 'warm' theory. We live in Australia it is basically warm all the time. I have a trans fluid temp gauge on mine and it is usually at 25 degrees every morning when I start the car and only takes a few minutes to be over 30C. Link to comment Share on other sites More sharing options...
Puffwagon Trust me bro...tbh ;) 8===} Gold Donating Members 16,064 Member For: 9y 11m 26d Gender: Male Location: South Australia Posted 12/05/21 08:31 AM Share Posted 12/05/21 08:31 AM Yeah nah I know what the official recommendation is and it is wrong. Do it from cold or you will underfill it. Link to comment Share on other sites More sharing options...
cat007 Member 236 Member For: 6y 4m 20d Posted 12/05/21 08:36 AM Share Posted 12/05/21 08:36 AM I think that's the point. Cold and the official recommendation is the same thing. Just means not 'operating temperature'. Link to comment Share on other sites More sharing options...
Puffwagon Trust me bro...tbh ;) 8===} Gold Donating Members 16,064 Member For: 9y 11m 26d Gender: Male Location: South Australia Posted 12/05/21 08:40 AM Share Posted 12/05/21 08:40 AM I mean cold as in the first start for the day, not after running for a minute. Literally have someone in the car, raise the hoist, get them to start the car and put it into drive and start filling until it comes out. I spose if you live in nth qld then 30c might be your starting point. 1 Link to comment Share on other sites More sharing options...
NA_TURBO Member 532 Member For: 9y 3m 16d Gender: Male Location: Mildura Posted 12/05/21 10:17 AM Share Posted 12/05/21 10:17 AM From ZF..https://cloud.tapatalk.com/s/609bab305f06d/ZF_SI_Oelwechselkit_50145_EN%20%281%29.pdf Link to comment Share on other sites More sharing options...
Puffwagon Trust me bro...tbh ;) 8===} Gold Donating Members 16,064 Member For: 9y 11m 26d Gender: Male Location: South Australia Posted 12/05/21 11:07 AM Share Posted 12/05/21 11:07 AM That'll need to be linked better so it can be clicked on Link to comment Share on other sites More sharing options...
NA_TURBO Member 532 Member For: 9y 3m 16d Gender: Male Location: Mildura Posted 12/05/21 11:08 AM Share Posted 12/05/21 11:08 AM I don't know how to upload a pdf file haha Link to comment Share on other sites More sharing options...
biddie_fiddler [IMPULSIV3] Donating Members 1,374 Member For: 5y 9m 26d Gender: Male Location: Perth, WA Posted 13/05/21 05:11 AM Share Posted 13/05/21 05:11 AM What @NA_TURBOis trying to attached is a ZF oil service manual. Click this link to get it, it'll download straight away. The full link is below: https://www.audiworld.com/forums/attachments/q5-sq5-mki-8r-discussion-129/94518d1521842717-q5-transmission-service-fluid-change-zf_si_oelwechselkit_50145_en.pdf 1 Link to comment Share on other sites More sharing options...
NA_TURBO Member 532 Member For: 9y 3m 16d Gender: Male Location: Mildura Posted 13/05/21 05:15 AM Share Posted 13/05/21 05:15 AM That's it! Thank you Link to comment Share on other sites More sharing options...
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