Originally Posted by Black5

I had my transmission serviced as suggested by the selling dealer after i kept insisting there was a problem. (He also suggested this is all it needed - probably to save him costs.)
It went into failsafe mode almost immediately afterwards and stayed there until the rebuild.

It's not the first time I've heard of a dealer suggesting this sort of behaviour from the transmission is normal. It isn't. My E39 with more than double the K's, (And admittedly a different transmission), has NEVER behaved like this.

My key symptoms were rough shifts between 1-2 and 4-5 and a pronounced delay shifting into reverse. It also was exhibiting a constant "jerk" like it wasn't sure what gear it should be in at a steady 1500 pm which equates to 60Km/h here, (which also happens to be the local road speed limit), and anything more than a half throttle kickdown was accompanied by violent clunks.

All gone after the rebuild by a specialised repairer. These transmissions CANNOT be rebuilt by your standard auto trans repair shop and require specialised knowledge.

I repeat. Trade it so that it becomes someone elses problem.

EDIT : Extending the warranty is a good call, but probably won't cover pre-existing issues. Insurance investigators are good at finding out things like you had already complained about the tranny prior to extending insurance.