We have a 2010 MY FF 5.0 SC which has covered about 59,000 miles. The last couple of days it has started juddering. This seems to happen between 1500-1800 rpm. It clears under harder acceleration, or as the revs rise, or if the 'box kicks down. It feels a little like driving over a cattle grid (as described elsewhere).

I have read a number of threads on here, and elsewhere, about the problem. Most of these seem to point towards the torque converter being on its way out. Couple of questions if you would be so kind:

1) does this sound like a sensible diagnosis?
2) presumably replacement is the "best" solution? How much might I expect this to cost?
3) how much might a reconditioned TC cost? Any recommendations for a specialist in North London /South Herts/Bucks?

TIA

just wondering if changing the TC oil would help, slightly cheaper than replacing it.. ... - .- -.




Y. O. L. O.
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Blimey, And we all thought the TD6 had gearbox issues, the S/C seems to be even worse given the speight of gearbox problems that are suddenly popping up. 2021 L405 Vogue SE 4.4 V8 DIESEL ~ #17

I would check your transmission fluid level first before condemning anything. Probably worth doing a transmission fluid and filter change at that mileage anyway. TC problems only usually appear at around 50mph or above when the lock up clutch comes into play.

My 4.2 does this intermittently, and has done for 45k miles over 2.5 years. I've had the trans fluid done several times and for me the fix is usually an IIDTool gearbox adaption reset, followed by telling the wife to stop driving my FF (or at least driving it like an old dodder). 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

please tell me more re the gearbox reset with the iidtool mr pie... ... - .- -.




Y. O. L. O.
.

Clearing the adaptives Stan. The ECU on the 6HP28 learns a driving style and it's this bit that gets cleared.

Yup that's the one. Engine adaptions is good to clear too after cleaning or replacing sensors or air filters. 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

so clearing gearbox/engine adaptations does no harm then...i'm confused as its said in this thread that a reset will cause problems,or am i reading it wrong,

http://www.fullfatrr.com/forum/topic10417....daptations ... - .- -.




Y. O. L. O.
.

Never had a problem so far ... 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

Thanks chaps. A friendly dealer has it in overnight for diagnostics. I am braced for their findings...

Apparently there was a vacuum hose that had come undone. Reconnected and £200 later its fixed by all accounts. If it really is fixed I don't begrudge the £200 given some of the other nightmare scenarios.

Result if that's what it was.

Keep us posted!

Also infuriating though. How does a vacuum hose come undone?! Sometimes, it's like bring back to the days of taking delivery of an SD1  2006 4.2 SC
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