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FredyG
Regular
Date registered: Oct 2007
Location: Venezuela
Vehicle(s): 1993 Defender, 96 Camel Trophy, 2000 G500 Cabrio
Posts: 79
| A/T Oil - Filter Change (722.6)
Following suggestions in a attachment by Dutch found in the MB work shop manual , I change my 722.6 A/T transmission oil and oil filter(at 145000 kms/90600 miles). If you read it carefull, you don't need any thing else, since I did it this weekend and every thing came out fine I wanted to post a couple of pictures of the tools and parts you need to do this job. That's all.
Edited by FredyG 7/5/2010 7:40 PM
 (Auto trans Filler neck 1.jpg)
 (AT parts, oil, funnel and tools.jpg)
 (AT parts di ricambi 3.jpg)
Attachments
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 Auto trans Filler neck 1.jpg (17KB - 9 downloads)
AT parts, oil, funnel and tools.jpg (185KB - 13 downloads)
AT parts di ricambi 3.jpg (169KB - 7 downloads)
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4x4abc
Date registered: Apr 2006
Location: La Paz, Baja California, Mexico
Vehicle(s): 02 G500
| RE: A/T Oil - Filter Change (722.6)
I am about to do mine tomorrow |
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W5YK
Extreme Veteran
Date registered: May 2006
Location: San Diego
Vehicle(s): 2002 G500, Unimog U2450,
Posts: 543
| RE: A/T Oil - Filter Change (722.6)
After you reassemble everything, I recommend disconnecting the tranny oil cooler return line and letting the old fluid pump out through there until the fresh red fluid starts to show. Only takes 15 seconds of idling to pump it out, so be alert. Then top up with the same amount you bled out. If you do that, you are changing >90% of the old fluid, versus maybe 50% if you just drain the pan. There is a Mercedes procedure that describes this in detail, so it's "official". |
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BlueG
Elite Veteran
Date registered: Aug 2009
Location: DC
Vehicle(s): 2003 G500
Posts: 714
| Re: A/T Oil - Filter Change (722.6)
Could also consider doing what I did which was draining out the pan, refilling, running through the gears for a couple minutes and then draining. I did this 4 times. It was costly but the fluid in there is now perfect. |
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4x4abc
Date registered: Apr 2006
Location: La Paz, Baja California, Mexico
Vehicle(s): 02 G500
| Re: A/T Oil - Filter Change (722.6)
when I bought the oil, filter and gaskets I was asked whether I would also drain the torque converter - I denied.
How would one drain the torque converter on the 722.6? |
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| Re: A/T Oil - Filter Change (722.6)
4x4abc - 7/6/2010 12:08 AM
when I bought the oil, filter and gaskets I was asked whether I would also drain the torque converter - I denied.
How would one drain the torque converter on the 722.6?
See Richard's answer for the closest you can get to it. |
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MiN
Extreme Veteran
Date registered: May 2006
Location: Alpujarras, Spain
Vehicle(s): No cars, at all.
Posts: 555
| Re: A/T Oil - Filter Change (722.6)
If you have a WIS the procedure is AR27.55-P-0100A, which Richard/Dutch refer to. You will need 14 litres of transmission fluid to do it. And, has been said above, this is the most thorough method of replacing your transmission fluid and flushing out the entire system, including the torque converter.
Edited by MiN 7/6/2010 9:52 AM
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G-AMG
G-Class DIY Host
Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
| Re: A/T Oil - Filter Change (722.6)
4x4abc - 7/6/2010 12:08 AM
when I bought the oil, filter and gaskets I was asked whether I would also drain the torque converter - I denied.
How would one drain the torque converter on the 722.6?
I believe in 1999, MB discontinued the use of a Torque Converter Drain Plug... for "Cost Cutting" measures....
So, NO, you can't drain the T/C.
"If" you had one... you would do the following (attachments)
 (10.JPG)
 (11.JPG)
 (12.JPG)
Attachments
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10.JPG (37KB - 7 downloads)
11.JPG (35KB - 7 downloads)
12.JPG (28KB - 7 downloads)
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jaywkang
Veteran
Date registered: Dec 2006
Location: Music City (Nashville TN)
Vehicle(s): 1980 Mercedes 230G, 1997 VW Golf VR6
Posts: 120
| RE: A/T Oil - Filter Change (722.6)
G-AMG, how in, the world do you keep your tools so freakin' clean in the middle of a procedure. I was looking through your DIY's and was amazed. LOL. Please keep up the wonderful work with documenting your DIY's. |
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mercedes_uae
Veteran
Date registered: Dec 2008
Location: Dubai
Vehicle(s): 2003 G55 SWB (sold), 2011 G55 LWB, 2013 G63 LWB
Posts: 130
| Re: A/T Oil - Filter Change (722.6)
hmm,.,. Aside from service , how often do you guys switch out AT fluid vs the AT filters? Does anyone change based on heavy usage or just on miles? |
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G-AMG
G-Class DIY Host
Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
| Re: A/T Oil - Filter Change (722.6)
mercedes_uae - 7/7/2010 10:19 AM
hmm,.,. Aside from service , how often do you guys switch out AT fluid vs the AT filters? Does anyone change based on heavy usage or just on miles?
My schedule is loosely based on MB's change of heart on the 722.6 boxes, initially "Sealed for Life", and now "Do ONE filter/fluid change at 39,000 miles."
Me, personally, have kept to this 40,000 mile interval.... EVERY 40k miles, not just once. |
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Roly
Elite Veteran
Date registered: Apr 2006
Location: Australia
Vehicle(s): 1999 G500
Posts: 661
| Re: A/T Oil - Filter Change (722.6)
I have adopted 36000 miles. When I bought my G it was 10y old with 50000 miles. I did the oil and then repeated it about 5000 miles later to get more of the old stuff out. Both filter and oil each time. Mine has a t/q drain plug  |
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G-AMG
G-Class DIY Host
Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
| Re: A/T Oil - Filter Change (722.6)
Roly - 7/7/2010 3:46 PM
I have adopted 36000 miles. When I bought my G it was 10y old with 50000 miles. I did the oil and then repeated it about 5000 miles later to get more of the old stuff out. Both filter and oil each time. Mine has a t/q drain plug :)
Lucky you.... you must have an "first half of the year" 1999?
Actually, if you drained the T/C as well, you aren't going to have much "Old Stuff" remaining.... |
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BlueG
Elite Veteran
Date registered: Aug 2009
Location: DC
Vehicle(s): 2003 G500
Posts: 714
| Re: A/T Oil - Filter Change (722.6)
My engine has an inspection panel that comes right off by gently prying. Does that mean I have a torque convertor drain or is that panel just a carry over? I am happy with my changing procedure and have beautiful red fluid but I wondered if I turned the torque convertor over if there would be a drain. |
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W5YK
Extreme Veteran
Date registered: May 2006
Location: San Diego
Vehicle(s): 2002 G500, Unimog U2450,
Posts: 543
| Re: A/T Oil - Filter Change (722.6)
BlueG - 7/7/2010 7:42 PM
My engine has an inspection panel that comes right off by gently prying. Does that mean I have a torque convertor drain or is that panel just a carry over?
No, I can save you some work. You will not find a TC drain plug there.
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BlueG
Elite Veteran
Date registered: Aug 2009
Location: DC
Vehicle(s): 2003 G500
Posts: 714
| Re: A/T Oil - Filter Change (722.6)
Thanks! |
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MiN
Extreme Veteran
Date registered: May 2006
Location: Alpujarras, Spain
Vehicle(s): No cars, at all.
Posts: 555
| Re: A/T Oil - Filter Change (722.6)
I've just done the fluid flush and filter change on my G55. The only thing I wanted to add here is that I wholeheartedly recommend using a suction device to suck the ATF out (in my case a Mityvac), rather than draining it from the sump plug. If you suck the fluid out you're left with about a quarter of a litre in the sump rather than the 1.5 litres if you drain. It's easier and a whole lot less messy.
I disconnected the joint between the flexible pipe from the oil cooler that connects with the metal pipe that goes back to the transmission. I then pumped out the transmission fluid into a waiting bucket in 3 litre stages. This is the most thorough method for changing all the fluid. You need 14 litres of ATF to do this procedure. |
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| RE: A/T Oil - Filter Change (722.6)
FredyG - 7/5/2010 4:13 PM
Following suggestions in a attachment by Dutch found in the MB work shop manual , I change my 722.6 A/T transmission oil and oil filter(at 145000 kms/90600 miles). If you read it carefull, you don't need any thing else, since I did it this weekend and every thing came out fine I wanted to post a couple of pictures of the tools and parts you need to do this job. That's all.
Is there a dipstick for the G500 Transmission?
 (AT.jpg)
Attachments
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AT.jpg (185KB - 1 downloads)
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| Re: A/T Oil - Filter Change (722.6)
I lost some fluid with a radiator change at the oil / water transmission cooler and was just a bit unsure of how much fluid I lost and how much to put back in. It may also be a good time for a fluid change or flush, I guess.
Eric |
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| RE: A/T Oil - Filter Change (722.6)
otiswesty - 5/22/2012 7:14 PM
Is there a dipstick for the G500 Transmission?
If you have a 722.6 transmission, it is the one in the picture. If you have the 722.9 transmission, the answer is "no". |
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