Rees

Thanks James, I was thinking on the fluids line. I had an old 3 speed TH400 auto on a car years ago and that displayed similar shifting problems whan the oil had had its day. I'll have a look for my nearest indie.

Hi All, I have a 2003 4.2 V8 and recently I have had an odd problem with the gearbox. After about half hours driving with the transmission operating normally in D, I'll pull away from a junction, the transmission will do a very lumpy first upshift. Then no matter how lightly or heavily I press the accelerator the it wont upshift until the engine hits 3500 rpm. From that point 6th and sometimes 5th wont engage. but, if I move the selector to the other side of the gate to 5, it all operates as normal with 6th locked out as you would expect. Selecting Sport mode makes no difference to the problem. There are no warning showing on the info display in the clock pack either. Does anyone have any ideas what may be wrong? Thanks