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Originally Posted by B-Line
I always thought the tow restrictions had less to do with the power of the engine (4.8is vs 4.4i) and had more to do with transmission coolant, suspension setup, etc.
Otherwise, why would BMW rate the 4.4 at the same tow capacity as the 4.8is. That never made sense to me, unless you figure the limitations have nothing to do with engine but with collateral parts.
B
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the 3.0 has the same limits as the others (all have 6000lb limits)... its more of a chassis limitation i think... and we've all seen how beefy the oem hitch is as it bolts to the frame of the vehicle...
and let me tell you that at 7000-7500 in the trailer and a couple of extra hundred lbs in the x5 towin up and down the grape vine at 65+ while turbo diesels were doing 35 sure felt good and solid...