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Old 26-08-2019, 09:22 AM   #5
Mondaveo
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Join Date: Dec 2015
Location: Dubbo, formerly Canberra
Posts: 336
Default Re: Limited Transmission Function Message

Quote:
Originally Posted by Chrisokau View Post
At the moment I can't risk driving it. If it was to stick itself in reverse at speed it could be disastrous!
I don't think that scenario is possible - modern transmissions have an interlock that prevents reverse being selected at speed. Although with my car I found it to be dangerous enough with a bad speed sensor causing balking on 1-2 gear shifts - and I still had all my gears - so fair call.

Quote:
Originally Posted by Chrisokau View Post
I did try changing through the gears and interestingly, when I went to sports mode and tried to change down to first the display showed seven!!
I've found gear 7 once, the time I had the Transmission Limited Function warning and no drive... I suppose it means that the requested gear is not selectable.

Quote:
Originally Posted by Chrisokau View Post
When I put it into reverse the rear detection sensor started beeping and wouldn't go off, even in drive, until I put it back to park.
This sounds like normal operation; the proximity sensors come on with reverse and remain on until forward speed increases above a threshold or Park is selected. Did you try the dashboard button to turn them off?

Quote:
Originally Posted by Chrisokau View Post
I am going to contact a transmission specialist tomorrow but I suspect that a second hand transmission is the only way to go and even then I won't get out of it for under 5 or 6 grand I reckon.
On reflection, I really think you might have a faulty input speed sensor like several of us have had, rather than total TCM failure.
Here is a nice post with some technical details about the gearbox. Pages 4 and 5 of the "What problems have you had" thread might be good reading for you in general.

There are two input shafts, one for gears 1, 3 and 5 and the other for 2, 4, 6 and reverse. If a shaft speed sensor fails, the gears on that shaft are blocked. I reckon the fact you've lost 1, 3 and 5 (but still get 2, 4, 6 and R) points to that shaft sensor being dead, and the additional crazy things like showing gear 7, and the car going into reverse on startup, is it trying to do it's best when it can't select 1st gear.

For what it's worth, the speed sensor replacement is apparently a gearbox-out operation with about $1,500 of the bill being labour, so a gearbox swap might not be too much more depending on how much you can secure the second-hand 'box for.

Good luck. I hope Hobart has a transmission specialist as good as the one that has been diagnosing and fixing all our cars in Canberra

Quote:
Originally Posted by Chrisokau View Post
If I can get the Mondeo repaired I'll sell it. Sigh. Never again will I buy a car with a DSG gearbox.
It is a shame - these cars are usually pretty solid if you can get past any issues with the gearbox, and when the DCT is working properly it does drive wonderfully. A pity Ford didn't have the reliability truly sorted before public release. Unfortunately if the DCT goes wrong they tend to be very expensive to fix, and the car is clearly only any good if you can trust in it to work right...
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2011 Mondeo MC Titanium TDCi wagon, Panther Black
- new Powershift sensor: Nov 2016

Quote:
Originally Posted by rondeo View Post
Like 'Mondeo' is possibly Latin for gearbox anxiety.

Last edited by Mondaveo; 26-08-2019 at 09:30 AM.
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