Joelog Posted January 29, 2020 Report Share Posted January 29, 2020 Hello all, I have decided that I should probably change the gear box oil on my 3L having not done so since 2013 minimum. It has the 085 box. What oil is recommended? Some say the 75/90 is too thick? Also, my gear box is missing the inspection plugs for what looks like 2 holes with a large toothed gear visible through the larger hole. I want to plug the holes to clean the engine/ gb so I can identify where it is leaking oil from. It is currently very dirty and has been since 2013. any assistance appreciated. Quote Link to comment Share on other sites More sharing options...
lupogtiboy Posted January 29, 2020 Report Share Posted January 29, 2020 VW list the gearbox oil as part number G 060 726 A2 which is the same as normal 085 gearbox oil. If you PM me a chassis number, I can check the quantity for you Quote Link to comment Share on other sites More sharing options...
Sausage Posted January 29, 2020 Report Share Posted January 29, 2020 The holes on the top are the inspection hole it should have a bung in it but not vital, you are looking at the flywheel ring gear. Quote Link to comment Share on other sites More sharing options...
RAB Posted January 29, 2020 Report Share Posted January 29, 2020 The two holes are those over the bell housing, the "gear" being the flywheel. They should be covered with a rubber moulding. Take care not to get water in there because it might seize the clutch. Oil is about 3 to 3.5L. RAB Quote Link to comment Share on other sites More sharing options...
Joelog Posted January 29, 2020 Author Report Share Posted January 29, 2020 Thanks Lupogtiboy, Sausage and Rab. Do any of you happen to have the part number for the rubber blanks to cover the holes? I could probably plug them with corks or similar if required. Quote Link to comment Share on other sites More sharing options...
Sausage Posted January 29, 2020 Report Share Posted January 29, 2020 (edited) I think this is the one: 085 301 115 A Edited January 29, 2020 by Sausage Quote Link to comment Share on other sites More sharing options...
Joelog Posted January 30, 2020 Author Report Share Posted January 30, 2020 Great, I have just ordered one. Many thanks! Quote Link to comment Share on other sites More sharing options...
lupogtiboy Posted January 30, 2020 Report Share Posted January 30, 2020 Number 20 is 020 301 132 Number 21 is 085 301 115 A Quote Link to comment Share on other sites More sharing options...
Sausage Posted January 30, 2020 Report Share Posted January 30, 2020 Should look like this. Quote Link to comment Share on other sites More sharing options...
Joelog Posted January 30, 2020 Author Report Share Posted January 30, 2020 Thanks for all your help. I have ordered the black rubber looking double one. What transmission oil grade would you recommend for the 3L. 75/80 or 80/90? Mine is a year 2000 model with just 178k miles on it. Hardly run in.... Quote Link to comment Share on other sites More sharing options...
lupogtiboy Posted January 31, 2020 Report Share Posted January 31, 2020 I think it's 75w90 gearbox oil Quote Link to comment Share on other sites More sharing options...
mk2 Posted January 31, 2020 Report Share Posted January 31, 2020 The regular 085 uses full synth 75W90. Worth flushing it, but being a computer controlled gear shift, probably has no wear at all. I only use https://www.ebay.co.uk/sch/121617362859 which has been perfect over the last few years in my Lupos. Quote Link to comment Share on other sites More sharing options...
Skezza Posted January 31, 2020 Report Share Posted January 31, 2020 I've always said 80w90 but it's a 3L so god knows Quote Link to comment Share on other sites More sharing options...
Joelog Posted January 31, 2020 Author Report Share Posted January 31, 2020 (edited) Mk2, thanks for the link. I will try that. The G 060726 A2 (Thanks Lupogtiboy) is a 75/90 GL4 spec oil and that linked oil is a combined GL4/5 spec due to additives so useful (I can put it in my jimny gear box and diffs too) thanks for your combined help all. Edited January 31, 2020 by Joelog Detail added Quote Link to comment Share on other sites More sharing options...
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