Hi all
I have had my 2005 td6 for a few months now and it had a replacement gearbox in 2012 (35k ago).
Driving this afternoon I noticed a judder at around 30-35mph when I had to slow down for someone. Once I took my foot off the accelerator the box went into 5th and when I put my foot back on the accelerator gently, it stared to judder as if it was in too high a gear. Once I pressed a bit harder on the accelerator and the box kicked down to 4th or 3rd it pulled as smooth as anything. The best way to describe it is as if you selected a high gear for a slow speed in a manual and the engine starts to struggle.I would hope the gearbox would last a bit longer than 35k but I know it might be possible.
There are no warning messages on the dash.
I would put a new gearbox on the car as the rest of it is perfect but I would like some opinions/advice from the many knowledgeable people on here rather than just take it to a garage to start with.
Any advice would be greatly appreciated.
Thanks in advance!

Easy to do a diy fluid and filter change then add some Dr Tranny to the new fluid. You can always just add the Dr Tranny... Sounds like Torque Converter judder


 2007 TDV8 VSE
2003 TD6 gone.
2002 P38a gone
1999 P38a gone
1997 p38a gone
1993 VSE gone
1992 VSE gone
1966 Series 2a with V8 conversion gone

The above post would be my first answer. Did it happen just the once? have you tried to re-create the exact situation to see if it does it again? If not, it may be possible that you had a momentary fuel or throttle issue that cleared on kick down when applying more throttle. Maybe wrong, just a thought, if so I would go with the above first, rather than diving straight into a box / TC change / overhaul. At that mileage the box should be OK. Fingers crossed

It’s had a very slight judder before but I didn’t think anything of it but know it’s been more prevalent I now know that’s what it was. Is the dr tranny safe to put in? And also is it a temporary fix or more permanent? As the box is still low mileage I want to protect it the best I can and would I be better putting a new TC in?
Genuinely thanks for your responses!

Sounds like you do have an issue there, but..........

It may be worth you sending a polite PM to RRPhil, and ask for his advice, I have seen his posts on here, he knows more about gearboxes T/C's than all of us combined, genius or wizard are the words that come to mind.

His advice would be well worth listening to

Thanks I will do!!

Happened to us . On a 35k ZF HP6 a few months back. First port of call was a diagnostic with Mr Gearbox , Sheffield. Turns out it was caused by dodgy reluctor rings and rear abs sensors.. Sending duff speed signals to the gearbox ecu , especially when it was downshifting.

All replaced and gearbox grief ended . That was a few thousand mikes back. ----------------
2010 RR tdv8 3.6 ( gone but not forgotten ...)
2012 RR tdv8 4.4
2004 RR 4.4 V8 (M62) -gone but not forgotten (sob)
1998 P38 RR - least said the better
2009 BMW 7 Series 3.0d
Various motor cycles - BMW GS
1998 Jag XKr 4.0 V8

you can do a test, put in drive, roll down the window, and let it go, if you hear it crawling, (noise like pads on the iron) it means that the converter is compromised