| Author |
Message |
Guest
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 Posted:
Tue Nov 29, 2005 6:08 am Post subject:
M535i (E28) auto gearbox problems |
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Hi all,
I hope someone can shed some light on this problem as its got me! I
recently bought a 1987 M535i with the switchable automatic gearbox. I
have discovered that when the car is cold it doesnt want to change
gears properly. I think it manages to drop into second gear but
refuses to go into third although at about 2500rpm there is a second of
hesitation as if it was going to change but decided not to. If its in
sports mode it seems to cope with better as doesnt need much to get it
to 40mph until its warmed up and then it behaves and changes gears as
normal for the rest of the journey.
The other weird part is when I come to a stop if I engage neutral it
still stays in drive while this other problem is happening, but again
when its warmed up it works fine. Any ideas anybody please as I have
no idea where to begin??? Im thinking maybe an electrical fault as the
wiring in the car was less than perfect to start with and I did have
fuses popping and even the heater fan has died although I have a
replacement ready to fit.
Thanks,
Dan.
P.S. I can also be contacted directly at danzuc@yahoo.com
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R. Mark Clayton
Guest
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| Posted:
Tue Nov 29, 2005 6:08 am Post subject:
Re: M535i (E28) auto gearbox problems |
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<danzuc@yahoo.com> wrote in message
news:1133222884.432590.263060@f14g2000cwb.googlegroups.com...
| Quote: | Hi all,
I hope someone can shed some light on this problem as its got me! I
recently bought a 1987 M535i with the switchable automatic gearbox. I
have discovered that when the car is cold it doesnt want to change
gears properly. I think it manages to drop into second gear but
refuses to go into third although at about 2500rpm there is a second of
hesitation as if it was going to change but decided not to. If its in
sports mode it seems to cope with better as doesnt need much to get it
to 40mph until its warmed up and then it behaves and changes gears as
normal for the rest of the journey.
The other weird part is when I come to a stop if I engage neutral it
still stays in drive while this other problem is happening, but again
when its warmed up it works fine. Any ideas anybody please as I have
no idea where to begin??? Im thinking maybe an electrical fault as the
wiring in the car was less than perfect to start with and I did have
fuses popping and even the heater fan has died although I have a
replacement ready to fit.
Thanks,
Dan.
P.S. I can also be contacted directly at danzuc@yahoo.com
|
Oil low, contaminated, changed for wrong grade in box?
Microswitches in box broken, clogged up etc.
In sport mode the gearbox is essentially hyraulic, but in economy the
electronics run it. |
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Dave Plowman (News)
Guest
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| Posted:
Tue Nov 29, 2005 12:02 pm Post subject:
Re: M535i (E28) auto gearbox problems |
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In article <1133222884.432590.263060@f14g2000cwb.googlegroups.com>,
<danzuc@yahoo.com> wrote:
| Quote: | I hope someone can shed some light on this problem as its got me! I
recently bought a 1987 M535i with the switchable automatic gearbox. I
have discovered that when the car is cold it doesnt want to change
gears properly. I think it manages to drop into second gear but
refuses to go into third although at about 2500rpm there is a second of
hesitation as if it was going to change but decided not to. If its in
sports mode it seems to cope with better as doesnt need much to get it
to 40mph until its warmed up and then it behaves and changes gears as
normal for the rest of the journey.
|
My E39 holds on to second gear when cold at town speeds. This is designed
in to get the engine (or more likely the cats.) up to temperature as
quickly as possible. My previous E34 did the same too - most noticeably
that it wouldn't select 5th gear - if starting from cold and going
straight on a motorway - until warmed up.
--
*Funny, I don't remember being absent minded.
Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
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John Burns
Guest
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| Posted:
Tue Nov 29, 2005 5:14 pm Post subject:
Re: M535i (E28) auto gearbox problems |
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| Quote: | The other weird part is when I come to a stop if I engage neutral it
still stays in drive while this other problem is happening, but again
when its warmed up it works fine. Any ideas anybody please as I have
no idea where to begin??? Im thinking maybe an electrical fault as
|
When you move the gear selector check the dashboard lights "agree" and
come on correctly. My 635 had play in the gear selector, I could select
drive but not have the dash light D illuminate. This gave me a twilight
zone where all sorts of odd things happened, none of them good!
Failing that the next step is to try a new filter screen and a fluid
change.
| Quote: | wiring in the car was less than perfect to start with and I did have
fuses popping and even the heater fan has died although I have a
replacement ready to fit.
|
Try cleaning the contacts to the fan first, I've had a few "die" because
of nothing more than dirt. Easy fix :-)
--
Who needs a life when you've got Unix? :-)
Email: john@unixnerd.demon.co.uk, John G.Burns B.Eng, Bonny Scotland
Web : http://www.unixnerd.demon.co.uk - The Ultimate BMW Homepage!
Need Sun or HP Unix kit? http://www.unixnerd.demon.co.uk/unix.html
www.Strathspey.co.uk - Quality Binoculars at a Sensible price |
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John Burns
Guest
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| Posted:
Tue Nov 29, 2005 7:20 pm Post subject:
Re: M535i (E28) auto gearbox problems |
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| Quote: | My E39 holds on to second gear when cold at town speeds. This is designed
in to get the engine (or more likely the cats.) up to temperature as
quickly as possible. My previous E34 did the same too - most noticeably
that it wouldn't select 5th gear - if starting from cold and going
straight on a motorway - until warmed up.
|
I suspect that's a (good) feature of the five speed boxes electronics. I
doubt the older four speed box is that clever :-)
--
Who needs a life when you've got Unix? :-)
Email: john@unixnerd.demon.co.uk, John G.Burns B.Eng, Bonny Scotland
Web : http://www.unixnerd.demon.co.uk - The Ultimate BMW Homepage!
Need Sun or HP Unix kit? http://www.unixnerd.demon.co.uk/unix.html
www.Strathspey.co.uk - Quality Binoculars at a Sensible price |
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