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D2 A8/S8 (1997 - 2003)
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Doing ATF filter and fluid change. Good price on Transgo 5HP24PR Pressure Regulator Valve.
Posted by: semso55 (106058) on 2017-12-31 15:27:33

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My recently aquired 01 S8 with 138k miles. No problems with AT prior to me deciding to do this other than occasional late downshift.
Fluid is pretty nasty and dark but no burnt smell. Some buildup on magnets but nothing out of ordinary. Filter was original (2000 year stamp).
I was just about to put it together when I remembered you guys telling me about the updated valve, thanks!
I'll be refiling it with Liqui Moly Top Tec 1200 which I've successfully used 2 years / 10k miles ago in my 03 BMW X5 4.6is (same tranny).
bavauto.com has a great price ($42 for 5L jug). For little over $100 I got 10L and 1L fluid pump.
Using ZF filtran filter and ZF gasket (rmeuropean)
I'm a big believer in Liqui Moly and I've verified with them as far as specs go. I've used their fluids (motor, tranny, PS pump, diff etc...) exclusively for 13+ years now with great success.
I may go back in X5 tranny and install the update as well since I didn't know about it at time.
Will post results when finished.
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