993 Faq Frequently Asked Questions about the Porsche 1994-1997 993



Filed under: Do It Yourself (DIY),Transmission — Jeff 993TT @ 12:47 am

Changing my transmission oil was pretty easy and my shifting action is much smoother.. It also gives me more peace of mind. There aren’t any filters in the trans! Really the hardest part was jacking up the car onto 4 jack stands.
I used 4 quarts of Amsoil 75W90 syntethic oil. Interestingly, it was pretty difficult to find Mobil 1 gear oil, which was my first choice. I found mostly Amsoil and Redline in shops. This oil wins the more colorful prize. It was a light blue color.

The manufacturer recommends doing this change at 30K, but at 19K miles, my trans oil was pretty dark and murky. There were a few shavings on the magnetic plug, which I cleaned off. ( See pic below. )

Thanks to Robin for a wonderful DIY. It helped me tremendously. Here are a few tips for the first time DIY’er that would be helpful.

a) You may need to put blocks under the rear wheels while jacking up the front of the car. With the front already on jack stands, the jack has less clearance to get under the tail of the car. My car isn’t lowered, but I needed the cinder blocks in the picture to get the jack under there. I used the rear engine jacking point without problem. The hockey puck trick worked great!

b) Definately use a 10 MM allen key socket. I had to purchase a 3/8″ to 1/2″ drive adapter to use a bigger ratchet handle. Those bolts are on pretty tight.

c) Robin’s DIY recommends that you remove the filler plug first, which is a good idea. However, it makes more sense to just make sure that you can loosen both the filler and drain plugs. You don’t have to remove them right there, otherwise, trans oil will start to flow out of the filler.

d) If you wait about 1/2 an hour for all the old transmission fluid to drain out, it will take all 4 quarts of the new fluid without spilling out of the filler tube. Just keeps things a bit cleaner. I liked the “oil bong” technique. It worked great. I used 7/8″ tubing and shaved down the end a bit. I then screwed it into the filler plug. If I were to do it again, I would have purchased an extra quart of AMsOIL to run through the transmission case to flush out any extra impurities.

e) Also, you will have to take off the driver rear wheel. I ended up taking off both rear wheels, becuase I couldn’t tell in Robin’s picture which one to do.

Here is a link to the gallery:

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