3spd Automatic Trans Fluid question
10-10-2006, 06:50 AM
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Track Day
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3spd Automatic Trans Fluid question
I've got an '80 928 (US) with the 3 speed auto box. The transmission shifts fine without any problems but is in a high mileage car @ 172k. I am about to do a filter/fluid change and was wondering what type/brand of transmission fluid do you all recomment?
Thank you much,
Thank you much,
10-27-2006, 08:58 PM
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Track Day
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Ended up using Redline D4 ATF synthetic with very good results. Much quicker shifting with less noise from the transmission. (The old fluid was Valvoline Mercon/Dexron II with about 10k miles of use.)
10-28-2006, 02:26 AM
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Redline make a good product for auto's and manuals. The fluid in your auto is dexron II/III, which is the most common fluid for automatic transmissions built in the 1980's, and thats not unique to Porsche.There are some pretty good synthetics available from Castrol and Mobil 1 as well that might be worth a look. The synthetic's can take alot more punishment than a standard dex but some owner's report more leaks with their use on older vehicles. Personally though I'd use a synthetic if my porsche was an auto.
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