Symptoms: There seems to be what can only be described as an odd 'fluid' sort of noise from the transmission every so often (I can't describe it any better than that, it isn't a mechanical noise though) which is followed by a momentary shudder before all returns to normal. It can happen any time, sometimes when changing gear, sometimes when altering throttle on/off, off/on, accelerating, even during constant speed travel. It isn't a massive thump or anything like that, it just a gentle shudder, but clearly isn't right.
Oil and filter have been changed (about 10k ago) but no mega flush. Car has 88k on it and it's been well looked after from what I can tell (FSH, good MOT history, only 2 previous owners, clean car).
It's a 4.4 TDV8 with the 8 speed
Is this likely to be something that a mega flush along with software update might sort, or could it be TC? Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

The dreaded shudder on an auto is usually related to the TC. I'm trying to find out right now if there is a software upgrade for the gearbox.
In my older cars I have put in Dr tranny with good effect but not to keen to try it in this box. Good luck.

TC is pretty much what I thought. It's far from bad yet and has only progressed very very slowly since I first noticed it about 10k miles ago. I'll keep the proverbial eye on the situation. Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

Have you checked the fluid level?
It’s easy to get it wrong on these

Also worth checking the correct fluid was used when it was changed

Correct fluid was used, it did it slightly before it was changed (not why I had it done, it was on 75k so I thought it was a good idea). Still wondering if a mega flush might improve things. I might try it but it's a dilema, if it works, great, but if it doesn't it's a waste. Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

Bodsy is your man for a Megaflush. Comes to you on your drive.
07770638023

I'd get a ZF gearbox specialist to diagnose it properly before changing more oil esp if it's already been serviced.

Thanks, and yes I agree. It's not bad yet, just a gentle shudder so I'm going to wait and see what develops. I'vebeen in touch with Bodsy and he says it sounds like an internal problem rather than needing an oil flush. Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

I’m still trying to get hold of Bodsy….. at least I know he’s real 🤣

Hope you get it sorted.

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

If you’re happy it’s got the right fluid in then I’d still check the l level before spending on diagnosis, can’t be any harm checking the simple/cheap things first

That's true, and a good point. My Dad always told me to check the simple things first (he was a mechanic)! Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

I have a similar issue - mainly at very low rpm. Slight shudder, release throttle, on throttle, fine. Just had a new TC - it’s going back to check levels 1995 4.6 v8, green/tan (long gone)
2005 4.8iS X5, blue/black
2011 4.4 tdv8, black/black (gone)
2003 3.0d X5, Oxford green/black/manual
2021 p575 SVR, BR green/vintage tan

Can you let us all know if that helps please? Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

The downside of an ordinary 'oil & filter' change [gearbox] is only around 40% of the oil is changed. A mega flush changes around 95% of the oil & at 88k I personally would have a mega flush done regardless. £300-£400 should be ample & much cheaper than any gearbox work that you may look at. Might turn out to be the TC but the easiest & cheapest way forward is a mega flush.
If Bodsy thinks it's "deeper" than a flush then that's a different matter. Be interesting to see what develops. 2012 Orkney Grey Westminster 4.4TDV8 with Ivory interior.........nice!
Alfa Romeo Giulietta
Just one Montesa now, 349 White Wonder
Austin A40 Farina MK2
1975 Morris Marina 1.8TC
1973 Honda CB250 K4