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      03-26-2019, 03:35 PM   #6
Juno01
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Drives: X5 35d
Join Date: Nov 2017
Location: Erie

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Has anyone decided to do this yet? I do a fair amount of interstate travel as well and I think the 3.15 would definitely improve fuel economy at 70+mph.

Performance around town worries me. It seems like the transmission doesn't kickdown as quick as I would like so even now and the car feels like a dog sometimes. It would be a lot of work to do the swap and have to revert back.

Last edited by Juno01; 03-26-2019 at 03:41 PM..
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