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ychung
Veteran
Date registered: Aug 2015
Location: SO CAL
Vehicle(s): 2004 G500, 2014 ML350, 2008 S550
Posts: 196
| Transmission Fluid Change Questions
Hi,
Although I've already done transmission fluids change before, I have a few question regarding it.
1. How do I know if my truck has drain plug on torque convertor?
2. Can I just loosen the valve body bolts to drain more fluids and faster?(I've seen people doing it on BMW)
3. Do I need to replace the electrical connector every time I change transmission fluids?
Thank you in advance for your answers, as always. |
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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: Transmission Fluid Change Questions
ychung - 5/19/2018 3:48 PM
Hi,
Although I've already done transmission fluids change before, I have a few question regarding it.
1. How do I know if my truck has drain plug on torque convertor?
2. Can I just loosen the valve body bolts to drain more fluids and faster?(I've seen people doing it on BMW)
3. Do I need to replace the electrical connector every time I change transmission fluids?
Thank you in advance for your answers, as always.
1.) It does NOT.
2.) I would not.
3.) Why? If it's not leaking, leave it alone. You do not need to remove it to change the ATF. |
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ychung
Veteran
Date registered: Aug 2015
Location: SO CAL
Vehicle(s): 2004 G500, 2014 ML350, 2008 S550
Posts: 196
| RE: Transmission Fluid Change Questions
Thanks, Dutch |
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jmr89
Date registered: Nov 2012
Location: France
Vehicle(s): Class G W463 320Cab V6 >>Ancien 230 GE Cab 1990
| Re: Transmission Fluid Change Questions
"TRANSMISSION 722.6## /6## ## as of 1772285 22.9.99 For reasons of cost, the oil drain plug on the torque converter has been deleted for all transmission variants." |
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BlueG
Elite Veteran
Date registered: Aug 2009
Location: DC
Vehicle(s): 2003 G500
Posts: 714
| RE: Transmission Fluid Change Questions
ychung - 5/19/2018 3:48 PM
3. Do I need to replace the electrical connector every time I change transmission fluids?
Thank you in advance for your answers, as always.
Replace that connector every time you drop the pan. Its less than $10 and when it leaks you get fluid into the harness and may not notice or see it - and it probably won't leak onto the ground. You won't be dropping the pan more often than every 30,000 miles so just spring for the connector and know its good and not wicking fluid into an expensive and difficult to clean/replace harness. |
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mb230s
Date registered: Apr 2006
Location: SWFL
Vehicle(s): G-less for now, vintage MBs, FJ40
| Re: Transmission Fluid Change Questions
You may have a drain plug on the torque converter. It disappeared sometime in 1999 and came back in the early/mid 2000s. I can't recall exactly when it happened but 2004 is probably pretty close. If I was doing the job I'd rotate the torque converter and look. It's much better to do the job with the complete flush. I wouldn't drop the pan unless you are changing the conductor plate (which IMO is a wear/maintenance item that should be done probably every other fluid change). I wouldn't replace the electrical plug unless leaking or doing the conductor plate. |
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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: Transmission Fluid Change Questions
mb230s - 5/25/2018 11:04 AM
I wouldn't drop the pan unless you are changing the conductor plate (which IMO is a wear/maintenance item that should be done probably every other fluid change).
How can you change the filter without dropping the pan? |
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4x4abc
Date registered: Apr 2006
Location: La Paz, Baja California, Mexico
Vehicle(s): 02 G500
| Re: Transmission Fluid Change Questions
original fluid - half the price:
https://www.amazon.com/gp/product/B00DWFSJLC/ref=oh_aui_detailpage_o... |
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mb230s
Date registered: Apr 2006
Location: SWFL
Vehicle(s): G-less for now, vintage MBs, FJ40
| Re: Transmission Fluid Change Questions
DUTCH - 5/25/2018 1:37 PM
mb230s - 5/25/2018 11:04 AM
I wouldn't drop the pan unless you are changing the conductor plate (which IMO is a wear/maintenance item that should be done probably every other fluid change).
How can you change the filter without dropping the pan?
Duh...I'll blame a senior moment - don't forget the filter! Although I've never seen anything in the filter or on the pan magnet even with poor looking fluid.. |
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imjustdave
Regular
Date registered: Feb 2012
Location: Bonney Lake Washington USA
Vehicle(s): 2004 G500, 2014 Audi Q7 TDI, 2006 Ram 3500.
Posts: 77
| Re: Transmission Fluid Change Questions
So... I have owned a G now for a year and honestly fairly new to Automatic transmissions.
mb230s
what is a conductor plate and why should it be replaced.
Anyone have a write up? But I assume I need to
clean it well
drop the pan
replace the filter
replace the conductor plate and filter
unsure how I drain out the rest to the system
fill ......... The dipstick I have seems to go in and stop but still has a bunch stilling out. Normal?
Do I check in park or drive? seems to have temp marks fairly explanatory.
Thanks
David
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gerryvz
Extreme Veteran
Date registered: Apr 2014
Location: Annapolis, MD
Vehicle(s): 1994 G320, 1989 560SEC, 1994 E500 (W124)
Posts: 336
| Re: Transmission Fluid Change Questions
The conductor plate problem on the 722.6 transmissions is well documented all over the internet. It's pretty much a "wear" part that has to be replaced, and it is specific to both trucks and sedans using this transmission.
A few educational videos on the topic:
https://mercedessource.com/store/removing-the-7226-valve-body-and-re...
https://www.youtube.com/watch?v=k3qrSDfK7SA
https://www.youtube.com/watch?v=ImUYRu-VhCE |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| Re: Transmission Fluid Change Questions
The original conductor plates certainly cracked and needed to be replaced. I was under the impression that the replacements were designed slightly differently so that the conductive tracks don't crack in the same way. Have you had the replacement fail?
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