2004 Audi A6 2.7T Sport Package, 6-speed manual.
Sometimes makes pump/rack noise when turning full lock.
Out: Pentosin CHF11S
In: Ravenol SSF
Method:
-Engine off, elevated front wheels off ground.
-Siphoned reservoir dry and added 10oz of BG Quick Clean
-Cycled steering wheel lock-to-lock 20x
-Siphoned reservoir, disconnected return line from reservoir and connected the end of the return line to a length of clear tubing. Places distal end of tubing into pail, clamped tube to pail with vice-grip tool. Placed rubber cap on return line inlet to reservoir.
-Filled reservoir with Sea-Foam transmission Tune.
-Cycled steering wheel lock-to-lock, observing clear tubing for color change, and topping off the reservoir with sea-foam until only sea-foam was coming out (pale red fluid).
-Switched to Amsoil P/S fluid, filled reservoir, and repeated cycling steering wheel lock-to-lock, topping up with Amsoil P/S fluid as needed until only Amsoil (pale tan fluid) was coming out.
-Switched to Ravenol SSF (bright lime green) in reservoir, continued cycling lock-to-lock until only Ravenol SSF was coming out. Stopped adding SSF, cycled lock-to-lock until reservoir was empty.
-Removed cap from reservoir inlet, reconnect return hose.
-Top up reservoir with SSF. Replace reservoir cap.
-Start engine and check for leaks (none).
-With engine running, cycle steering lock-to-lock 20x to ensure air is purged. Shut off engine.
-lower car back to ground.
-Start engine, take short test drive.
Result:
Smoother steering. Some noise remains when doing tight turns at slow speeds. Overall, improved.
Things I’d change for next time:
-add the recommended amount of Sea-Foam transmission Tune to PSF about a week before I intend to flush. Drive car as normal.
-Siphon reservoir dry and add 10oz of BG Quick Clean to top up reservoir a day or two before I plan to do the flush. Drive car as normal. This should give the Quick Clean a chance to circulate at operating temperature and dissolve any deposits, instead cycling it through the system cold, once.