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Steve, BMW Expert
Category: BMW
Satisfied Customers: 25389
Experience:  BMW Expert
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Do you think it could be the gear box itself? If so...why is

it running in 5th and... Show More
it running in 5th and reverse?
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the gearbox is made up of many parts
it is hard to say "it is the gear box itself"
because ultimately it will be some part inside
however, there are a lot of things that are so expensive to fix on a gearbox that when one does fail, the gearbox is replaced or completely overhauled, so in this frame, yes, you could need a full overhaul or replacement
it runs in reverse and 5th because it is designed to when locked in limp mode
ultimately there is some fault that is triggering limp mode, but when in limp mode, it is designed to lock in high gear when in forward, and to still work in reverse
please let me know if you have further questions. please do not forget to select a positive rating