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J.R.
Elite Veteran
Date registered: Apr 2006
Location: Southern Maryland
Vehicle(s): 00 G500, 09 911 4S, 11 Cayenne S, 86 280GE (sold)
Posts: 828
| RE: 1999 G500 Transmission rebuild
Roly - 11/30/2015 3:28 AM
Do you know that the battery earth strap is a two part arrangement. There is the one in the battery compartment (which you replaced) going to the body and then a second external strap going from the same body connector bolt to the chassis. This second strap is concealed behind the rear bumper. Ensure that the connection between the two straps is clean as you will have disturbed it when you replaced the battery earth cable.
Since you unscrewed the large bolt in the rear for the ground strap, do make sure that the nut on the end of that bolt is secure as it serves a purpose for the other ground strap.
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NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 465
| Re: Transmission rebuild
I hope you find an easy solution to the no start, like a ground strap or a bad connection.
As far as swapping the shifter control unit, I've read somewhere that MB uses a security coding for activation, some theft prevention feature.
I could be wrong as I do not recall what year this was adopted?
Speedy recovery! |
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| RE: 1999 G500 Transmission rebuild
J.R. - 11/30/2015 11:25 AM
Roly - 11/30/2015 3:28 AM
Do you know that the battery earth strap is a two part arrangement. There is the one in the battery compartment (which you replaced) going to the body and then a second external strap going from the same body connector bolt to the chassis. This second strap is concealed behind the rear bumper. Ensure that the connection between the two straps is clean as you will have disturbed it when you replaced the battery earth cable.
Since you unscrewed the large bolt in the rear for the ground strap, do make sure that the nut on the end of that bolt is secure as it serves a purpose for the other ground strap.
I'm really feeling the love here. The no start problem is very temporally related to my changing the ground strap as the last event.
I will check it first thing this evening.
Thanks for all the helpful suggestions. |
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Gilamonster
Veteran
Date registered: Sep 2013
Location: New Mexico
Vehicle(s): G #1 (mix of a 460, 461 & 463), #2 is a 2000 G500
Posts: 151
| RE: Transmission rebuild
Interesting problem. I ran this by Marc at OCD and his first thoughts are along with the others - rear ground strap and transmission bell housing ground strap.
Keep us posted.
William |
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| Re: Transmission rebuild
It looks like Roly is owed a beer. Heck, beers all around!
The nut fell off the lower ground strap underneath the body when I changed the ground strap at the battery. So the connection was minimal to nonexistant. I don't think I would have ever found that without the help of the P3 forum.
Now that I'm back in action, I will take care of that trans plug leak ASAP.
Cheers
Eric
Edited by otiswesty 12/1/2015 12:50 AM
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NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 465
| Re: Transmission rebuild
Congratulations........Yahooo! We all love the easy fix!!!!
Thank you for sharing your findings.
Many carefree happy miles.
NHD |
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| RE: Transmission rebuild
The G would not shift out of 1st as I tried to drive it to work this morning. It seems like a typical symptom for the ATF on the electrical connector at the trans.
Common 722.6 issue on Benzworld E and S class forums
Also the 3 month history of the no start in "P" looks to be a maladjustment of the shift lever from the trans at the shifter arm.
see Dutch's pdf
I'll get these sorted soon and report back with results.
Attachments
----------------
 Adjusting shift rod.pdf (21KB - 13 downloads)
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Aircruiser
Extreme Veteran
Date registered: Aug 2011
Location: Atlanta GA
Vehicle(s): 2000 G500, 1986 300GD, 2017 Porsche Cayenne Hybrid
Posts: 364
| RE: Transmission rebuild
otiswesty - 12/1/2015 11:03 PM
The G would not shift out of 1st as I tried to drive it to work this morning. It seems like a typical symptom for the ATF on the electrical connector at the trans.
Common 722.6 issue on Benzworld E and S class forums.
I had a similar problem with holding first gear. It first appeared once every blue moon, then more and more often, especially when cold. If put in neutral for a few seconds then back in gear it behaved normally for a while. STAR diagnostic read a intermittent rpm fault. The conductor plate and plug were changed last month with excellent results. |
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NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 465
| Re: Transmission rebuild
Wouldn't a new conductor plate come with a reman transmission?
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NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 465
| Re: Transmission rebuild
Any feed back to end this post otiswesty. I've been reading and waiting...
Do diligence request? |
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| Re: Transmission rebuild
I had the G at the dealer for about 3 weeks. Waiting on parts from Germany mostly. A sad reminder of the frustrations I encountered with 460 G-class ownership.
The dealer felt that there was likely a problem with one of the solenoids on the conductor plate in the trans. They got in a new one from Germany, pulled the trans pan, filter and conductor plate. All of the solenoids tested okay, so that turned out to be a false alarm. The ignition switch was sticking in position 3, so that was replaced with a new part from Germany as a possible cause. I had recently replaced the shifter assembly with a new unit from the dealer, they found this to be faulty by diagnostics, and replaced it again under warranty. Also did further work cleaning grounds. Trans plug was replaced under warranty as well.
O2 sensors were also replaced due to CEL fault.
I got the car back last week. Everything seemed okay....
I still have a problem with the vehicle occasionally stalling when shifting from P to R/D , cold engine. Also had the vehicle stall driving but at idle yesterday. I have taken the G back in and am waiting for further info.
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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 rebuild
otiswesty - 12/28/2015 3:05 PM
I still have a problem with the vehicle occasionally stalling when shifting from P to R/D , cold engine. Also had the vehicle stall driving but at idle yesterday. I have taken the G back in and am waiting for further info.
Bummer. Is it throwing any codes? |
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| Re: Transmission rebuild
There was a code for the K40, which I had changed out for a used unit, we'll see if this returns. A code for the transmission solenoid, one for the O2 sensor, maybe others. |
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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 rebuild
otiswesty - 12/28/2015 3:29 PM
There was a code for the K40, which I had changed out for a used unit, we'll see if this returns. A code for the transmission solenoid, one for the O2 sensor, maybe others.
Present this last time you turned it in to the dealer? |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| Re: Transmission rebuild
otiswesty - 12/28/2015 12:05 PM ...I still have a problem with the vehicle occasionally stalling when shifting from P to R/D, cold engine. Also had the vehicle stall driving but at idle yesterday. I have taken the G back in and am waiting for further info. This has an ECU controlled throttle, right? If it is just a little slow to open with the extra load of going into drive then the engine will stall. Perhaps it is gummed up and sticky when cold. Can't hurt to check it or swap it with a known good one.
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ILIAN
Veteran
Date registered: Sep 2014
Location: Boston MA
Vehicle(s): 2000 G500 1999 CL500
Posts: 181
| Re: Transmission rebuild
Maybe it's time to clean the throttle body and the crankcase ventilation holes. The holes are very small and they clog up over time. The throttle body builds up gunk in the small openings that allow the airflow in the closed position when idle. Also a malfunctioning EGR or not enough flow can cause the engine to stall at idle. My engine has about 800 RPM when in P and N and drops to about 600 or a bit less when in D and R. |
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NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 465
| Re: Transmission rebuild
Thank you for the update
Man, you deserve a break here!
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| Re: Transmission rebuild
These issues have all occurred since the trans went out. The dealer's thought on this latest, is that it may be related to high pressures in the trans cooler circuit, possibly from tranny gear metallic chips and debris that are impacted in the air/oil trans cooler. They are going to pull and test it with bidirectional power flushes. |
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NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 465
| Re: Transmission rebuild
That theory isn't very comforting otiswesty!
If they find debris in the cooler circuit, then some of this debris may have reentered the transmission since the swap.
Fingers crossed they do not find anything.... And even if they don't, just the idea warrants multiple flushes and filter changes to make sure?
Yikes, good luck with this.. |
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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 rebuild
NHDave - 1/2/2016 7:06 AM
That theory isn't very comforting otiswesty!
If they find debris in the cooler circuit, then some of this debris may have reentered the transmission since the swap.
Fingers crossed they do not find anything.... And even if they don't, just the idea warrants multiple flushes and filter changes to make sure?
Yikes, good luck with this..
Hopefully, the return line from the cooler re-enters the tranny on the dirty side of the filter. |
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