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Discussion Starter #1
hi,

I have 645 ci 2004

from time to time, not always, Isome time feel gear change while on auto is a bit jerky.

I more likely to get jerk (not always) when I do a sudden stop (due to traffic light) from say less than 40 - 50 mph,

I had a gear box sump and bush & gear oil replaced 8 months ago, and dont see any leak in the gear box either. I have only started to notice it couple of days ago, (probably because I spent whole 3 days in car)

I would like to know the experience of other people with same or similar models please, is it normal or am I building a problem in gear box.

Many thanks in advance.
 

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I fear you are building a problem - what's the mileage?

However, could be a software upgrade is needed but could also be the solenoid in the box. Both these options are a few hundred quid.......for a new box add a zero........
 

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Discussion Starter #3
hi,

I have done 96k,

if not replaced 'solenoid ' can this lead to bigger problem ?

could it be that the quantity of gearbox oil is not enough, as garage was telling me there is no level indicator to check the gear box oil level ?

Also I have had software upgrade after I had my sump and seal replaced about 7 months ago, so I hope I dont need another upgrade ?

many thanks in advance.
 

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Hmm, if you've had the fluid changed the level won't change....assuming the right amount went in and there's no leak. Ditto the software upgrade then. The box is sealed so there's no dipstick.

So, box is on the way out - the solenoid (in my basic understanding) is the bit that is electronically told to move the gears - so if it malfunctions t needn't cause other damage as such as the box will cease to function.

I fear the worst on this one I'm sorry to say....but smarter people than I may have more optimistic views.
 

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Discussion Starter #5
thanks for your feedback, I will probably get the oil level checked again, as it happens occasionally...
 

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thanks for your feedback, I will probably get the oil level checked again, as it happens occasionally...
You can't actually check it so you'd need to shell out c£120 for a further fill of new fluid, plus labour to drain the current stuff. I suppose it could go back in but the risk of contaminant would be high and I'd worry about a garage prepared to do it!!
 

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Discussion Starter #7
I will probably replace the oil again, that is to be at safe side, just in case on last occassion it was not topped up properly.

out of interest, changing geabox oil, can any garage do it, or would you recommend only specialist to change,

I remember from last time, its just a matter of opening one nut near the sump, and topping up from other ?

Regards,
 

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I will probably replace the oil again, that is to be at safe side, just in case on last occassion it was not topped up properly.

out of interest, changing geabox oil, can any garage do it, or would you recommend only specialist to change,

I remember from last time, its just a matter of opening one nut near the sump, and topping up from other ?

Regards,
I don't think there's anything particular about doing it, but based on your experience last time, maybe go somewhere on recommendation if you don't have a trusted place? The key is that they use the right fluid and of course the right amount. I don'tr think there is a drain plug - it's a sump-off job so price for a new gasket also?
 
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