Auto-box probs.
Discussion
Hi Guys,my E39 528i auto-box has developed a problem in as much as it does not change up into a higher gear after using a bit of power such as overtaking. Bit of a pain with engine spinning at 6500 revs. and not changing up into a higher gear. I have to flick across into tiptronic mode and change up that way.
In normal driving it works perfectly so I can't believe it's too serious a fault. I'm guessing there's an
electrical signal between the accelerator control and the gearbox that's malfunctioning.
Hoping Blackspider can help. Cheers.
In normal driving it works perfectly so I can't believe it's too serious a fault. I'm guessing there's an
electrical signal between the accelerator control and the gearbox that's malfunctioning.
Hoping Blackspider can help. Cheers.
StuB said:
Tyres are possible, the wheel speed sensors feed the brain that controls the box and if it thinks you're cornering (like if your tyres are of different circumference), it wont change. Did you recently replace a rear tyre?
Got me thinking now,replaced both rear tyres about 2000-3000 miles ago. The car has had Inspection 1 service since then and the dealer commented on a bit of un-even tyre wear on one of the front tyres. Where is/are the speed sensors?
mr.man said:
Hi Guys,my E39 528i auto-box has developed a problem in as much as it does not change up into a higher gear after using a bit of power such as overtaking. Bit of a pain with engine spinning at 6500 revs. and not changing up into a higher gear. I have to flick across into tiptronic mode and change up that way.
In normal driving it works perfectly so I can't believe it's too serious a fault. I'm guessing there's an
electrical signal between the accelerator control and the gearbox that's malfunctioning.
Hoping Blackspider can help. Cheers.
In normal driving it works perfectly so I can't believe it's too serious a fault. I'm guessing there's an
electrical signal between the accelerator control and the gearbox that's malfunctioning.
Hoping Blackspider can help. Cheers.
Had the same on E39 530. Dealer said change tyres - problem solved.
He also said the speed sensors are the abs sensors and operate off all four wheels - so it could be your front tyres that are causing it.
The plot thickens..........Driving along normaly tonight and out of the blue two bright yellow warning lights appear on the dash. ASC and ABS together. Looking like a wheel sensor failure (or a poor connection or something amiss on the ignition switch). Any input please Mr Blackspider would be much appreciated.
Edited by mr.man on Monday 21st May 23:09
mr.man said:
The plot thickens..........Driving along normaly tonight and out of the blue two bright yellow warning lights appear on the dash. ASC and ABS together. Looking like a wheel sensor failure (or a poor connection or something amiss on the ignition switch). Any input please Mr Blackspider would be much appreciated.
I see you are in East Anglia. Edited by mr.man on Monday 21st May 23:09
If you are anywhere near Chelmsford you could try PMW Ltd - 01245 496739, ask for Peter or Steve.
Peter is an ex BMW Tech and now runs a very busy 4 ramp workshop specialising in BMW/Merc.
I cannot recommend them highly enough.
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