Nag1 TECH ALERT

[josephpampliega]

Originally Posted by abittenbinder

Technically your transmission did not 'go to neutral', it lost all drive.

Only a few transmission fault codes can result in intentional loss of drive and your 2108 shift P solenoid circuit code is not one of them. If the 2108 code did not reappear after the solenoid actuation test then it is likely an unrelated, older, stored fault code.

Did you replace the filter? I suspect fluid pressure is low. You should be able to check pressures with your DAS.

Doktor A

I replaced filter too with new one. I will go ahead and check pressure and post my results.

I hope the pump or torque conveter did not get destroyed for whatever reason as the level was correct prior to draining.

Thanks for the reply.

[Kubbie]

Originally Posted by abittenbinder

Now, using the same T-30 Torx bit, you used to remove the pan- loosen all the bolts and remove all but 2 (opposing bolts) holding the valve body in place. Supporting the valve body carefully-remove the last 2 bolts and lower the valve body down and carry it immediately into your surgically clean(?) workshop.
A

I removed the 10 bolts and cannot drop the valve body. I also have adapter plug unscrewed.
Is there something I am missing that is preventing it from dropping? ( I put two back in to come inside to type this...)

Edit: never mind - need to learn to count to 10.

[mackconsult]

Wow I am surprised that I never noticed this write up. Thanks Dr A.

My sprinter has had pretty light use and sitting on 119k. Right after I bought it @ 67k I changed tranny fluid and filters. Planning on a tranny change again this summer so I will be sure to do my transmission plug and this procedure when I do it.

[abittenbinder]

Originally Posted by mackconsult

Wow I am surprised that I never noticed this write up. Thanks Dr A.

My sprinter has had pretty light use and sitting on 119k. Right after I bought it @ 67k I changed tranny fluid and filters. Planning on a tranny change again this summer so I will be sure to do my transmission plug and this procedure when I do it.

I am now recommending this procedure (R+R of valve body for inspection and cleaning of the speed sensors) only when symptoms and/or fault codes are present.

Doktor A

[Ro3bert]

Doctor A

With respect to the speed sensors gathering particles, is there any way to cover those magnets with some sort of plastic, something resistant to the transmission oil? That would certainly make cleaning them a cake walk especially if the plastic was removable.

Robert

[abittenbinder]

Originally Posted by Ro3bert

Doctor A

With respect to the speed sensors gathering particles, is there any way to cover those magnets with some sort of plastic, something resistant to the transmission oil? That would certainly make cleaning them a cake walk especially if the plastic was removable.

Robert

The speed sensors are Hall effect sensors, one of which is already covered with plastic. Transmission fluid does not harm the.

Cleaning them requires dropping the valve body and I now recommend cleaning is only necessary if corresponding fault codes are present and/or excess metallic debris is found in the pan.

Doktor A

[calvin]

Haven't had any problems with my trans as of yet (240k).. but just wanted to thank everyone for the time and effort put into gather and posting this information. (btw, I've changed my atf fluid to amsoil and have had no problems for 40k :) )

Thank you all

[mawsea]

Originally Posted by mawsea

It's back!!!!!!! so about A month ago I did the Fluid change to the shell ATF, the speed sensor clean and valve body clean, new connector and even did the DARF mod. The results were amazing.....for about a month. Now the shudder is back worse then ever. To be frank I've been reading these forums for the past seven years since the yahoo days. I really don't feel like re-reading every post on the RSN subject. So does anybody have an Idea why the shudder was gone and then reappeared?

So I took it into a Mercedes dealer today, thinking maybe it was just low on fluid or a code need to be cleared. Mercedes said I needed a new $1400 torque convertor.

[abittenbinder]

Originally Posted by mawsea

So I took it into a Mercedes dealer today, thinking maybe it was just low on fluid or a code need to be cleared. Mercedes said I needed a new $1400 torque convertor.

Ask the dealer to reset transmission adaption. Do not bother with any relearning procedure, just the reset.

Doktor A

[jdcaples]

There are several DAD scan tool owners in Seattle. You may be able to leverage the community to get a free, or substantially cheaper transmission control module adaptation reset than at the local dealership.

-Jon