The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

5-speed automatic transmission problem S80 1999

posted by  someone claiming to be Hannu Mikola on  Sun Feb 4 13:03 CST 2001 [RELATED]

I´ve been a happy S80 owner for two years now. There is a minor problem with the automatic 5-speed transmission. Having been braking with the engine for several seconds and pressing the gas pedal only slightly in order to keep driving with a constant speed again, the system seems to lock and continues to keep the gear direct-coupled. The only way to get the car moving with a constant speed or accelerating slightly is to give it more power. As a result I get an unconveniently hard shifting-up and ´a kick in the ass´. The head-box of the transmission has been replaced and the software updated (late 1999 versions). I think it must be a bug in which the control software doesn´t cope with following situation: transmission direct-coupled -> engine braking (-> low revs) -> soft acceleration. It seems to calculate and think of the situation for too long time, then suddenly gets awake and abruptly shifts up.

Any others with a similar problem?

I´ve tried to find the manufacturer´s website but haven´t succeeded yet (I think the model the automatic transmission box is AW-5). It would be very interesting to find out how the box adapts itself to different driving styles, how often this information is calculated and adaptive memory updated (the time span). When the software resets itself (every time the engine stops?) etc. Any sources for this information?





USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.