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Transmission oil change DIY

 
 
Old 05-01-2009, 10:06 AM
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elbeee964
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Default Transmission oil change DIY

Transmission oil change

Quick facts
Req. Change Frequency: every 48,000 miles (min)
Oil (qty): 75 W 90 gear oil (3.8 qts)
Fill and Drain plug Torques: 22 ft-lbs.
Fill and Drain Plug Hex wrench size: 10mm.

Replacement parts: 2 aluminum seals (Porsche p/n 900-123-011-30; “Sealing ring A 22 x 27”, Pelican p/n 900-123-118-30-M131)
Tip: This is the same seal used on both engine oil drain plugs. Since they’re inexpensive [@ $0.50], it’s convenient to buy extras for upcoming oil changes, as well.

Steps:

1. Driving car just prior to this procedure to thoroughly mix the transmission’s oil is preferred.
Overview of procedure items to be used: Fig 11.
[The short piece of plumbing pipe shown was needed in my case to help break loose a (previous) overzealously torqued plug.]
Name:  Fig 11Transmission fluid change supplies used in demonstration.jpg
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2. Jack up car at the left/driver’s side, rear jacking point. [Fig 1] Remove left rear wheel.
Name:  Fig 1 Driver's side rear jack (with safety stand).jpg
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3. Place catch pan under transmission drain plug. (Expect 1 gallon of fluid to drain fast.)

4. Remove transmission fill and drain plugs w/ 10mm hex. [Fig 2]
Note: Jaime reminds me of his frustration of removing the drain plug 1st, only to find the fill plug impossibly torqued tight.
(How would you refill that scenario?)
Lesson learned: Remove the fill plug 1st, for sanity's sake.
Name:  Fig 2 Overall arrangement.jpg
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5. Lower car to (level to) complete transmission draining.

6. Inspect and remove metal debris from drain plug magnet. [Fig 3, 4, 5, 6]
Note: Metal shavings shown in Fig 3 are normal. If metal chunks are present, seek professional review of your transmission.
Name:  Fig 3 Drain Plug Removed.jpg
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7. Jack up car at the left/driver’s side, rear jacking point.

8. Reinstall cleaned drain plug to 22 ft-lbs. [Fig 7, 8]
Name:  Fig 7 Prior to final draining (off the jack).jpg
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9. Fill new transmission oil into the transmission fill port until fill port overflows. [Fig 9, 10]
Note: I used a gravity feed to fill the tranny by holding the oil bottle shown above the transmission's level (and punching a hole in the oil bottle) the oil will flow into the tranny. Sure, it's a little slow, but it's a 'no' pressure, works-every-time method I found convenient. There are other oil pumping devices you may choose to use. Many ways 'to skin this cat.'
Name:  Fig 9 Filling to overflow (note drip in mid-air).jpg
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10. Lower car to (level to) allow further overflow of transmission oil. When flow has decreased, jack the car back up.

11. Reinstall cleaned fill plug to 22 ft-lbs.

Transmission oil change complete
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Old 05-01-2009, 10:48 AM
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Wachuko
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Cool

This is grea! Thank you!

The only thing I would add is

MAKE SURE YOU CAN REMOVE THE FILL PLUG BEFORE YOU REMOVE THE DRAIN PLUG...

There was this time, with my 951... anyway... you get the idea...
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Old 05-02-2009, 07:57 AM
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elbeee964
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The Delvac was the concensus pick a year ago.
Formulations, new arrivals, and worthy concensus opines may have changed since. I don't know.
I DO know the stuff wasn't easy to find.
Finally found a source, nearby, at Lufteknic in Richmond, VA. (no affiliation)
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