Thread: Advice Please: '05 4.8is with Trans Fail Safe mode error, have only 50k miles
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Old 04-17-2021, 07:38 PM
oldskewel oldskewel is offline
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I have had a trans failsafe error (not sure of exact wording of the message) on my 3.0i when the alternator was flaking out a little (and the transmission was just fine, and still is). Your 4.8 has a ZF AT vs. my 3.0 has the GM, but I'd at least consider an electrical issue causing the message before diving in on AT work.
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2001 X5 3.0i, 203k miles, AT, owned since 2014
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