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I have a good friend who is a SA at my dealer and I have spoken at great lengths which him and a few techs about lifetime fills on trans and diffs. They all say that 50-60k is the most the recommend going without a flush and fill. May not be cheap but much cheaper than replacement. I changed the trans fluid on my 540 MSport at 50k and it made the trans much much smoother. The indy shop who swapped it for me said the original fluid was in need of a change
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17 M3 ZCP -- 2017 Range Rover Sport SC
--RIP--
12 X5 50i Sport -- 11 M3 DCT -- 2011 X5 50i(Lemon) -- 2008 550 Msport -- 2007 x5 4.8 sport -- 2004 545 sport -- 2002 x5 4.4 sport -- 2001 540i Msport  2000 SL500 -- 1997 SL500 |