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#1
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saga cont...P0175, relaced conductor plate, now no gears...help!
I finished replacing the conductor plate in the tranny today.
Removed 1.3gal fluid,(way more than the 3-4L expected), only refilled with 4L, thats all I had on hand. Old fluid was dirty with particles and few micro specs of metal, but nothing serious, just incredibly dirty. After re-installing everything, I started it up, shifted into D (which was noticebly smoother already), and slid slowly out of the garage. I stopped to back up and Reverse, and no go. Then back to D, no go again. There was no engagement by the tranny into any gear, nor was there a clunk when doing so. So, it seems to me that the valve body isnt engaging, its electrical, or an acuator. My tranny electrical connector did have a little oil in it, but it wasnt flooded, I cleaned it thoroughly before reinstalling.. Any ideas would be great right now!! Thanks, Chris |
#2
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Even if you disconnect the electrical connector there will be 1 gear going forward. That is a mechanical connection.
Have you correctly checked the fluid level?
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Doc,
I KNOW its low on oil since I only put back about 3.5L and I removed about 5.5L, so we are 2qts low. Could this indeed be the problem? Not enough hydraulic pressure in the system to actuate the valve body? R and D feel like N, engine revs, absolutely no lurch or movement. **new thoughts There were 2 areas I thought of and checked. 1. Metal lever which slides into gear slot, its seated as when removed. 2. Sliding piston with orangy/red plastic square piece on end. It had to be pushed in/retracted into valve body, in order for the entire assembly to go back into the tranny. (i noticed when i removed the valve body, it slid out slowly) Last edited by chlubb; 02-04-2008 at 09:21 AM. |
#4
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update:
Correct oil and tranny now functions in R and D. Just need to get the reset done. Has anyone had any success with any independents anywhere?! My MB dealer is 25 min by highway and at 30mph and a lot of backroads its quite a haul. Thanks, Chris |
#5
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Why 30 MPH???
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#6
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because the tranny is in limp mode, 1st gear only, at 3500rpm its about 30mph.
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#7
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Getting the transmission out of "limp" mode doesn't require clearing the fault codes. The transmission will resume normal operation once the actual malfunction is resolved. The fault codes will still be "stored" in the ETC module, but the shift quality will return to normal.
Perhaps you're confusing the term "reset" with erasing the fault codes. The "reset" usually refers to re-setting the adaptation data. While sometimes helpful in diagnosing transmiission issues, adaptation data at the limit shouldn't put the transmission in limp mode. It sounds like you've still got a problem. FWIW, have you checked to see if the transmision control module is contaminated with ATF? It's been known to happen. Last edited by ILUVMILS; 02-11-2008 at 07:56 PM. |
#8
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hmm, this is different data than I have read on the boards.
Almost all say that even after replacing the bad part, that the TCM needed to be cleared, reset or whatever they want to call it. Some posted specifically that after replacement of the new part, the tranny was still in limp mode, they took it to the dealer and they wiped the errors and it was back to normal. I have not checked the computer for oil. Please indicate if all of the other posts are incorrect as it has been a hot topic. Thanks, |
#9
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Quote:
Check the control module for ATF. It only takes a few minutes!!! |
#10
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i have read posts saying the module was under the shifter or under the dash. do you have quick instructions for where the module is?
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#11
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What model MB do you have?
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#12
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2000 ml320
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#13
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The transmission control module is just above, and to the right of the accelerator pedal. Just remove the under-dash panel and you'll see it.
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#14
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thanks!
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#15
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ok TCM fine, dry as a bone.
Now, new but old problem. Tranny again will not or barely engage R or D. Heres the entire story. I replaced the conductor plate draining 5.5L of fluid. I put in 3L because thats what I had on hand, tranny wouldnt engage, slid right into R and D like they were N, no thump or jump as if a gear was engaged. I put in another 1.5L and measured with disptick tool. Tranny engaged great but was still stuck in limp mode. Dipstick says I am 1/2inch over max fill. I remove 1L and let the car sit for a while. Disptick measures acceptable level. I let the car sit because I needed to take it to the dealer the next day for the TCM/ECU. ok, so again, car doesnt move, total oil replaced is 3.5L of 5.5L removed, but dipstick says I am at max when warm. SOOOO, logic woudl dictate that fluid is low, thus the lack of engagement of gear, but dipstick says otherwise, whats the deal????? FYI, when car started today, it moved slightly in R and D but after a few feet just started revving the engine, stopped moving. Waiting a few minutes, tried R and D again, moved a little bit and then revving. Please someone give me the answer or is it just in front of me, forget the dipstick and put the same amount of fluid back in that I extracted, which was factory fill??? |
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