2.5 TDI AUTO TRANS thread

[Greg Roles]

Hi All,

My 2009 BPC 174 engine is running like a train, seems it's sorted after the saga I've had getting there. See my pinned info thread if you are looking for engine specific info, or want to see the agony of repairing this unit from a zero knowledge base.

My 6 speed tiptronic auto is the focus of this thread, as I'm finding on long trips it will flare, clunk and go into "all numbers" highlighted soft limp under certain conditions, and obviously needs a rebuild sooner rather than later. It is still driving fine, and on the recent 500km weekend trip only had three limp situations in heavy highway traffic, and a simple key off restart clears that.

I've limited automatic gearbox experience beyond solenoids, so in the interests of losing the rest of my hair, and entertaining you all, I'm going to endeavour to first research, understand and then rebuild this notorious gearbox myself.

What could go wrong?

I've now done a few thou and will drop half the fluid - as much as will drain anyway, fit a new filter and gasket, and apply the "Mr Shift" USA O9G kit to the solenoids and drive like that for a few thou more. I've no doubt it probably needs a drum, pistons and frictions/metals, as well as a solenoid rebush in the least, but see how the fluid and shift kit goes.

I'm installing a temp gauge on my external cooler so I can watch temps, and I think the fan that came with the external cooler should ideally be fitted, I have it off for clearance for now, and when it got hot on the big trip, it seemed to play up more.

Let the messy ATF games begin ( hate that stuff most of all! )

Greg.