Mike Joy 0 Posted August 9, 2020 Share Posted August 9, 2020 I have a 15 yr old Volvo D1-20, have replaced worn clutch plates but slipping again in forward. Does anyone know if there is an adjustment? Quote Link to post Share on other sites
Mike Joy 0 Posted August 14, 2020 Author Share Posted August 14, 2020 its a MS 10A reverse gear. One possibility is the wrong oil it has red transmission oil at the moment going to try something thicker Quote Link to post Share on other sites
Island Time 1,235 Posted August 14, 2020 Share Posted August 14, 2020 Iirc, the old spec for AT fluid, dextron 111, was changed to real oil, SAE 15w40. Check with a Volvo dealer for the service notice. They should tell you for free, or even provide a copy.... Quote Link to post Share on other sites
Mike Joy 0 Posted September 18, 2020 Author Share Posted September 18, 2020 Problem solved sucked out red transmission fluid replaced with old style sae 30 gearbox oil. No more slipping works perfectly Quote Link to post Share on other sites
Island Time 1,235 Posted September 18, 2020 Share Posted September 18, 2020 Mikem why sae 30? Ive not seen a spec for that, only the sae 15w 40 I mentioned above? Quote Link to post Share on other sites
wheels 543 Posted September 19, 2020 Share Posted September 19, 2020 SAE 15/40 ends up having a very similar Vicosity to a mono 30. Except a mono 30 remains a much more stable oil. So I would expect 30 would actually be the better performer than the 15/40 in a box like this. That is simply my opinion though. Quote Link to post Share on other sites
vic008 17 Posted September 19, 2020 Share Posted September 19, 2020 So would that be the same as the engine oil? Quote Link to post Share on other sites
Mike Joy 0 Posted September 19, 2020 Author Share Posted September 19, 2020 @Island TimeITime I was wrong about sae 30 it was w30 oil Quote Link to post Share on other sites
Island Time 1,235 Posted September 19, 2020 Share Posted September 19, 2020 2 hours ago, vic008 said: So would that be the same as the engine oil? Yep. Now used in most Volvo saildrives. Quote Link to post Share on other sites
wheels 543 Posted September 19, 2020 Share Posted September 19, 2020 14 hours ago, Mike Joy said: ITime I was wrong about sae 30 it was w30 oil Same thing. SAE (Society of Automotive Engineers) is simply the standard of test used to determine the Viscosity of the Oil. The W simply means winter (not weight) and is placed between the two sets of numbers purely to divide them. When there are two numbers, say the 15W40, the 15 means that at freezing point, the Oil will have a Viscosity or "Pour Rate" of 15. The Oil itself is normally this lower rating. As oil is heated, it thins very quickly. Additives are used to fortify the viscosity of an oil as it is heated. In the 15W4- case, the oil will remain at a 40 weight viscosity as it gets hot and stay that way through out it's entire temperature range. Quote Link to post Share on other sites
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