Tiptronic and Lifetime Fill?

[superglide]

Jim,
It's that time for me, now. Bentley says 90k for my '00'S' Tip fluid, I've just hit 50k, but the car's almost 9 years old now; time for new fluid & filter.

My question is; if the total capacity is 9L, and the change is 3.5L; how do you go about getting ALL the fluid out? Doesn't seem too practical to go through all that work for a bit over one third of the fluid.

Not do it myself and go to a (Porsche) shop w/ a fluid exchange machine? If so; use a trans flush between old and new fluid? And is there anything to beware of, other than using the correct fluid, if the above direction is taken?

I've enjoyed your posts, for their technical awareness, particularly the exchange re: dyno results....
Best Wishes,
Andy

Originally Posted by MNBoxster

Hi,

There is a change interval for the Tiptronic S tranny. It's 40k mi., Fluid, Filter and Gasket. The only approved ATF is Porsche Part # 999.917.545.00 ESSO LT 71141 or equivalent (whatever that means...??).

ATF expands significantly when heated, so the fill must be done with the Fluid between 85°F and 100°F. If the Temp is too Low, you'll Overfill it and conversely if the Temp is too High, you'll Underfill it.

But, the Fluid Level s/b checked at least annually. Open the Fill Screw and at proper Temp (take care not to be scalded), a little Fluid should drip out, if not, you need to Top it Up.

There's a special Fluid Pump needed for the Fill. Porsche recommends the VW Tool VAG 1924 ($324!) or you can make your own from a Garden Sprayer and some bent Tubing. The Kicker is that the Fill opening is capped internally by a Rubber Deflector Cap with Fill Flaps on either side. You need a nozzle, for lack of a better word, which is bent back at a 45° Angle to slip through this Fill Flap, and one can be fashioned from some Copper Tubing or such. Care must be taken when inserting the nozzle not to dislodge this Deflector Cap. If it is dislodged, you're Draining and Removing the Pan again to recover it and put it back in place.

The Capacity is 9 ltrs. including the Torque Converter or 3.5 ltrs. for a Fluid Change. I am going to change mine this Spring at 24k mi. because of a need to replace the Gasket due to some seepage around the Pan Seam (I have to dump the Fluid to remove the Pan and replace the Gasket, so I'll change the Filter and clean the Pan and the Magnets while I'm in there).

Also, the Differential Oil Supply is separate on the Tiptronic (It is shared with the Manual Transmission Oil on Cars with Manual Transmissions). So this must be checked separately. This uses standard SAE 75W90 Hypoid Gear Oil (Cap. 0.85 US Quarts). The Drive Axle must be removed to do this, so it's a good idea to plan this for when you need to R&R the CV Joint Boots.

FYI, the appropriate Torque Values are:

• 1. Filter Retaining Srews - 4.5 Ft. Lbs.
  2. Transmission Pan Retaining Screws - 8 Ft. Lbs.
  3. Transmission Pan Drain Plug - 29 Ft. Lbs.
  4. Transmission Filler Plug - 59 Ft. Lbs.

The Dealer wants $650 for this work. My estimate, including Filter, Gasket and Fluid will be $225. Hope this helps...

Happy Motoring!... Jim'99