Welcome to the Australian Ford Forums forum.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and inserts advertising. By joining our free community you will have access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features without post based advertising banners. Registration is simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact us.

Please Note: All new registrations go through a manual approval queue to keep spammers out. This is checked twice each day so there will be a delay before your registration is activated.

Go Back   Australian Ford Forums > Club and Speciality Forums > Forum Community Car Clubs > AU Falcon.com.au

Reply
 
Thread Tools Display Modes
Old 26-09-2011, 01:14 AM   #1
Dr Jekkyl
Regular Member
 
Join Date: Oct 2008
Location: Perth
Posts: 267
Default Auto Transmission 'slipping'

Hi all,

I have noticed something lately that has got me worrying.

When holding 3rd gear and accelerating, at ~2500 RPM my revs drop and I lose some speed. It is as though the trans is changing up. It isn't upshifting however because if I shift to D then a proper upshift occurs. It is only transient and not associated with any sinister noises or crunching, etc. It only happens if manually shifting and when holding 3rd......does not happen in 3rd gear when set on D. Does not happen in any other gear either.

Trans last serviced in Dec 2010.

At this point in time my brain is not capable of trouble shooting this so I wonder if any one can give me some insights.

Dr Jekkyl is offline   Reply With Quote Multi-Quote with this Post
Old 26-09-2011, 01:17 AM   #2
XRGhia
meh.
Donating Member3
 
XRGhia's Avatar
 
Join Date: Jul 2010
Location: Was Central Coast, Now Sydney NSW
Posts: 8,584
Technical Contributor: For members who share their technical expertise. - Issue reason: Contributions in the technical arena. 
Default Re: Auto Transmission 'slipping'

I'd suggest to at least service the transmission every 20,000km's or 12 months at the very most.... Not saying that it will hurt to not service it that often (The old AU went nearly 2 years and 80,000km's without a trans service), but it's a good preventative thing that should always be done at either of those intervals...


Could also be the ECU trying to force the trans to shift up....
__________________
Previous - BF XR6T - 325rwkw, 6 Speed Auto, Process West, X-Force and Turbosmart gear
XRGhia is offline   Reply With Quote Multi-Quote with this Post
Old 26-09-2011, 01:51 AM   #3
FGII-XR6
FF.Com.Au Hardcore
 
FGII-XR6's Avatar
 
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
Default Re: Auto Transmission 'slipping'

get a transmission service from a transmission specialist . thats not just changing the oil and filter it is making all the appropriate adjustments
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty.

"It is better to remain silent and be thought a fool than to speak out and remove all doubt."

Start a new career as a bus driver

Rides:
FG2 XR6 stock at this stage but a very nice ride

xc 4 DOOR X CHASER 5.8 UNDER RESTO
FGII-XR6 is offline   Reply With Quote Multi-Quote with this Post
Old 26-09-2011, 03:03 AM   #4
66 coupe
around the place
 
66 coupe's Avatar
 
Join Date: Jan 2005
Location: Perth
Posts: 1,754
Default Re: Auto Transmission 'slipping'

Quote:
Originally Posted by Dr Jekkyl
Hi all,

I have noticed something lately that has got me worrying.

When holding 3rd gear and accelerating, at ~2500 RPM my revs drop and I lose some speed. It is as though the trans is changing up. It isn't upshifting however because if I shift to D then a proper upshift occurs. It is only transient and not associated with any sinister noises or crunching, etc. It only happens if manually shifting and when holding 3rd......does not happen in 3rd gear when set on D. Does not happen in any other gear either.

Trans last serviced in Dec 2010.

At this point in time my brain is not capable of trouble shooting this so I wonder if any one can give me some insights.
That sounds like it is just the converter locking up and is normal,
you will find if you switch between power/economy the lockup point will change
66 coupe is offline   Reply With Quote Multi-Quote with this Post
Old 26-09-2011, 03:05 PM   #5
macman
FF.Com.Au Hardcore
 
macman's Avatar
 
Join Date: Jun 2006
Location: Western Australia
Posts: 2,195
Default Re: Auto Transmission 'slipping'

Yes, does sound like the normal converter lockup in 3rd.
macman is offline   Reply With Quote Multi-Quote with this Post
Old 26-09-2011, 04:40 PM   #6
Mr Hardware
Flairs - Truckers Delight
 
Mr Hardware's Avatar
 
Join Date: Aug 2006
Location: Brisbane Northside Likes: Opposite Lock
Posts: 5,731
Tech Writer: Recognition for the technical writers of AFF - Issue reason: The excellent how to on LPG jet cleaning. 
Default Re: Auto Transmission 'slipping'

Dr Jekkyl, i read your thread title of 'auto transmission slipping' then i read your opening post, but I can't seem to see how it is doing anything but normal behaviour. When a transmission slips, your revs will increase - it will feel almost as though the car has been knocked into neutral.
__________________
Current: Silhouette Black 2007 SY Ford Territory TX RWD 7-seater "Black Banger"
2006-2016: Regency Red 2000 AUII Ford Falcon Forte Automatic Sedan Tickford LPG "Millennium Falcon"
Mr Hardware is offline   Reply With Quote Multi-Quote with this Post
Old 27-09-2011, 01:01 PM   #7
Dr Jekkyl
Regular Member
 
Join Date: Oct 2008
Location: Perth
Posts: 267
Default Re: Auto Transmission 'slipping'

So this phenomena is very probably normal? Thats good news.

I am just not sure why it is suddenly so prominent though.....I have had the car for nearly 18 months. The last thing I need right now is expensive repair/replacement of my transmission.

I will be getting it serviced in November again so I will see what happens then.

Thanks for your input.
Dr Jekkyl is offline   Reply With Quote Multi-Quote with this Post
Reply


Forum Jump


All times are GMT +11. The time now is 11:38 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Other than what is legally copyrighted by the respective owners, this site is copyright www.fordforums.com.au
Positive SSL