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#1
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722.6 Shift from 2nd to neutral
I have read various posts and saw a few recommendations on similar situations. I have a 1996 SL600 which was received as a wreck. I do not know how well the transmission performed prior to or right after the wreck. But after servicing this trans and reinstalling it it now shift's from second to neutral, when trying to shift to third. Stays in neutral until you slow down long enough to get it to down shift.
In accordance with previous posts. Checked and adjusted fluid level. When the trans was out of the car there was evidence of oil wicking into the connector that was cleaned and a new material (white, old one was red) seal was installed. Examination of the power flow for this transmission indicates to me that the K2 clutch is not engaging. Using Carsoft 7.4 software I get no EGS codes. Considering each time I pull the pan on this it's $100.00+ I would like to get your thoughts. Should I pull transmission and do a complete overhaul or maybe pull valve body and replace 2-3 shift solenoid. Can I do a pressure check of the K2 clutches with the VB removed. I am very familiar with overhaul of automatic transmissions in American cars only. But I've yet to do an MB. I can think of three sources of manuals for overhauling transmissions. Does anyone have anything more appropriate. MB 129 service CD ATSG Transmission manuals All Data Your thoughts
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To see my 129 parts for sale visit: http://stores.ebay.com/The-Mercedes-SL-Store John Roncallo |
#2
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http://www.auto-video.com/ go here and but the 722.6 package they have. i've not done any rebuilds myself, always buy them. just a valve body here and there. i can't say why the 2-3 shift is doing that. never seen that in a 722.6 good luck, chuck.
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#3
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I think you better tell it how fast you are going. Why the H would it shift when you aren't even moving.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician |
#4
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Quote:
I did more testing today with live data. It appears to not be getting a command to shift. This also happens whether I start in W (second gear start will go from 2nd to neutral) or in S (first gear start will go from 1st to neutral). The command to shift is never given but neither is the command to go into neutral. The transmission will just hold its gear either first or second at long as it is under acceleration. The sift to neutral occurs at a time that the transmission would normally up shift like when you let up on the gas or just attain a high enough speed.
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To see my 129 parts for sale visit: http://stores.ebay.com/The-Mercedes-SL-Store John Roncallo |
#5
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http://www.peachparts.com/shopforum/tech-help/145652-722-6-transmission-issue.html#post1098330
E420 Transmission Control Problems
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-Justin 91 560 SEC AMG - other dogs dd 01 Honda S2000 - dogs dd 07 MB ML320 CDI - dd 16 Lexus IS250 - wifes dd it's automatic. |
#6
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Quote:
I haven't gotten much over 30 mph yet due to rain but I so far got 1st second and third no limp home mode no problems yet. This car without ESP in the rain can get away in a heartbeat so I have to be real careful. Thank you Steve Most transmission shops around hear probably would have charged me $4000.00. Just one more example of the value of these boards.
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To see my 129 parts for sale visit: http://stores.ebay.com/The-Mercedes-SL-Store John Roncallo |
#7
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Quote:
Add this thread to your list.
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To see my 129 parts for sale visit: http://stores.ebay.com/The-Mercedes-SL-Store John Roncallo |
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