I was driving yesterday and slowed down to turn a corner, once I turned the corner and pressed the gas, the engine reved (like the car was in neutral) then it jumped into gear with a hard thud. The same thing happened several times today when i was stuck in traffic. Does anyone have an idead what the problem might be? It's a 2005 with 145,000 miles.
Thanks.

I have tracked down my all comms and pulled this code "Symptom gear monitor fault General fault " from the transmission"

I hate to tell you but this symptom is the box itself. The box will need to overhauled/repaired £1000 or replaced £2000.

I have seen identical symptoms on a high mileage RR with same ZF gearbox the tell tale sign of failure is the "Thud" back into drive.

Worth spraying the gearbox link-mechanism with WD40 (under Car on side of box see wiki) "just in case" but your description is of a failing box unfortunately.

Last edited by Gazellio @ Prestige Cars on 12th Nov 2012 1:42pm. Edited 1 time in total

Thanks for the reply. When i drove the truck this morning, it worked fine until i got almost to work (about a 20 minute drive). Could the trans be running too hot from a clogged raditor or may airlock in the collong system?

Yes it is almost certainly caused by overheating due to Oil Cooler not working correctly due to a clogged lower section (lowest eight rows) of the main radiator. VERY common issue.

May be too late for your box as damage may be done but if you get a repair or new box you must have Oil Cooler flushed and the Main Rad repaired or replaced.

A1 Premier Transmissions may be able to help 0845 643 9747

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Thanks once again. is there an easy way to determine if the lower portion of the radiator is clogged without removing the radiator? Or is there a way to see if the trans cooler is actually working properly?

Yes the speed that that the radiator drains 1 litre fluid for from the drain/release plug can be timed to see if its blocked or not. You will have to search for correct times (Google or maybe on here)