Biker Posted yesterday at 12:37 AM Report Share Posted yesterday at 12:37 AM Any transmission guys here know if there is any advantage to switching from ULV to LV trans fluid? My understanding is that the super thin ULV is part of the effort to reduce parasitic drivetrain losses to boost fuel economy. Not necessarily the best for wear or longevity. I'm thinking of switching unless there is a smart transmission guy that knows otherwise. 1 Quote Link to comment Share on other sites More sharing options...
garycrist Posted yesterday at 01:34 AM Report Share Posted yesterday at 01:34 AM Back a long time ago, we would sub thinner type f for Type A for harder faster shifts. The LV will shift softer read slip the clutches and add heat. It could void the warranty too. 1 Quote Link to comment Share on other sites More sharing options...
Wubster100 Posted 18 hours ago Report Share Posted 18 hours ago I have thought about switching from ULV to LV, but I haven’t found enough solid research or firsthand experiences to know for sure whether it’s a good or bad move. In theory it would make things better? They are both low viscosity types, but ULV is designed to meet tighter tolerances and specific OEM requirements. Is it only for better fuel economy or is there something else at play? Without more data and real world feedback, I’m hesitant to make the switch and risk long term issues. Quote Link to comment Share on other sites More sharing options...
1004ron Posted 17 hours ago Report Share Posted 17 hours ago My Google search results advise against changing viscosity - I would not experiment with it. 2 Quote Link to comment Share on other sites More sharing options...
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