T5 TDI 2.5L auto fluid change Q's

[Rebuild]

G'day, new here,based in Adelaide, with a 2004 2.5L TDI LWB 6spd auto van, bought secondhand with 55K on the clock.Now up to 75K'ish.Out of warranty.

Been browsing through here for a while, and require some auto gearbox info if possible.
I originally posted about the gearbox here
http://www.brick-yard.co.uk/forum/fo...TID=23244&PN=1

Want to do an auto fluid and filter change.I've got a VW manual coming and I think I will go with Penrite DX-VI semi synthetic fluid.Is this a good choice?Is there better?

Don't have a VAG thingy to get fluid temps for the change, but should otherwise be good to go once the manual arrives.

Also, are these gearboxes ZF or AisinWarner?According to my VW manual it is coded HCE.I can't see any code plate when i look under the vehicle.

Cheers,