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Auto box shift speed

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Sgr74

Active member
Sunny Fife, Scotland
Is it normal for the auto box shift to be quite slow?
I have a 30i so a single clutch box. I was out last weekend and noticed in sport mode the shifts seemed to take forever. I intend to change the gearbox oil at its next service (she’s just gone 120000 miles). I asked a local indie for a price and he quoted me £750 to service and do a diagnostic check on it. I thought that was quite steep but if it’s not shifting as it should, maybe it’s worth it.
Any opinions would be appreciated.
 
From a chat i had with my local auto trans specialist I've learnt that gearbox issues are rarely cured by just doing a fluid change. There is nearly always something else going on.
 
I would say the opposite…first port of call with auto boxes is oil level / quality of oil..

Fluid should have been changed at 60k miles come what may..so long long long overdue..

Filters and fluid are in excess of £300 plus labour
 
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