I just bought it like this. Owner said it has been doing it Solid for years without increasing. Fluid is clean and appears new. I’ll try a fluid and filter change .. and I’ll toss in some Lucas. I have a spare tranny but would rather not swap it out if I don’t have to

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero