I drive a 2003 x5 4.4. My rpm started bouncing a tiny bit in 3-5 gear when it is above 2000 rpm not as much in higher rpm but it happens. It will also go into transmission fail safe mode at some point while driving it. Is this the torque converter? It shifts smoothly and downshifts smoothly.

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2003 x5. 4.4
2003 540i M-tech