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yes you are right about TCU name. Passenger floor board under carpet is where it is located. Should be an easy swap to go back to factory unit. unplug aftermarket flashed unit plug in factory unit, they are not VIN coded like ECU. Yes, TCU tune is just a reflash of the factory unit.
Can you clear the Trans codes with your reader?
I am under the impression that those had to be cleared with a Mercedes SDS?
Perhaps BBirdwell will chime in, he one of the rockstars with these cars, I take his word as automotive e55 gospel
I am not sure if I can clear the codes, I did take the car on a long trip with my family and the transmission was great. I've put about 500 miles on it, since the repair/service, I think I fixed it. I am going to throw the oem computer in to see how it responds to that.
Good to see you have it back on the road and restoring it to its glory.
I would posit that the code (shown as "past" code) was mechanical-hydraulic. The transmission (IIRC) will shift and stay in 3rd gear or the last known good gear. The limp home mode can be cleared by just a key on/off.
If the code is caused by an electrical fault, the transmission will only engage 2nd gear or reverse. Expect the shift from Park or Neutral into either of those to be harsh as the electronic control is deactivated. In the case of an electrical fault, the limp home mode can only be cleared by use of the diagnostic system.
Sorry to miss all the fun but the last month was spent troubleshooting and modifying an energetic particle detector that was having some serious issues. It's for an upcoming solar exploration mission and launch dates don't wait so there was a wee bit of pressure on the team to identify and correct the problems. :-)
Good to see you have it back on the road and restoring it to its glory.
I would posit that the code (shown as "past" code) was mechanical-hydraulic. The transmission (IIRC) will shift and stay in 3rd gear or the last known good gear. The limp home mode can be cleared by just a key on/off.
If the code is caused by an electrical fault, the transmission will only engage 2nd gear or reverse. Expect the shift from Park or Neutral into either of those to be harsh as the electronic control is deactivated. In the case of an electrical fault, the limp home mode can only be cleared by use of the diagnostic system.
Sorry to miss all the fun but the last month was spent troubleshooting and modifying an energetic particle detector that was having some serious issues. It's for an upcoming solar exploration mission and launch dates don't wait so there was a wee bit of pressure on the team to identify and correct the problems. :-)
Thanks for the information. When I replaced the conductor plate the filter was not attached to the valve body. I think that cleared up most of the problems I was having. It still has a slow engagement when going from park to reverse, and reverse to drive, 2-4 seconds. I really only notice it when the car has not reached operating temperature. I'm not sure if this is a characteristic of this transmission, but I have read of other people having the same issue. Any thoughts on that? Thanks in advance.
Not yet, I am going to wait until after I repair the exhaust. I don't want the techs to have to pull down a one piece exhaust system. I don't really want to give them a reason to charge me extra, and that exhaust is a pain to lower. I've had to do it twice already.
Good to see you have it back on the road and restoring it to its glory.
I would posit that the code (shown as "past" code) was mechanical-hydraulic. The transmission (IIRC) will shift and stay in 3rd gear or the last known good gear. The limp home mode can be cleared by just a key on/off.
If the code is caused by an electrical fault, the transmission will only engage 2nd gear or reverse. Expect the shift from Park or Neutral into either of those to be harsh as the electronic control is deactivated. In the case of an electrical fault, the limp home mode can only be cleared by use of the diagnostic system.
Sorry to miss all the fun but the last month was spent troubleshooting and modifying an energetic particle detector that was having some serious issues. It's for an upcoming solar exploration mission and launch dates don't wait so there was a wee bit of pressure on the team to identify and correct the problems. :-)
Sounds like you have an interesting job. Should have ask on the forum, most of us know how to fix energetic particle detectors:-P
Thanks for the information. When I replaced the conductor plate the filter was not attached to the valve body. I think that cleared up most of the problems I was having. It still has a slow engagement when going from park to reverse, and reverse to drive, 2-4 seconds. I really only notice it when the car has not reached operating temperature. I'm not sure if this is a characteristic of this transmission, but I have read of other people having the same issue. Any thoughts on that? Thanks in advance.
STAR or Xentry diagnostic systems allow you to monitor the "fill" rates inside the transmission. A value of 0 is new, a value of 15 means time to rebuild because the mechanical parts are so worn the electronics cannot compensate.
STAR or Xentry diagnostic systems allow you to monitor the "fill" rates inside the transmission. A value of 0 is new, a value of 15 means time to rebuild because the mechanical parts are so worn the electronics cannot compensate.
As others have said, glad you're able to do all this wrenching yourself. Can't imagine what the dealership would take outta your back-side for what you've remedied so far.
As others have said, glad you're able to do all this wrenching yourself. Can't imagine what the dealership would take outta your back-side for what you've remedied so far.
Thank you. I'm sure it would be a very expensive bill.
I finished up the front end work today and replaced the oil cooler seals and the little timing case cover seal. Started working on the exhaust also. Degreasing the valve covers. I had to take about an inch out of the magnaflow x-pipe so it would fit in the tunnel. OTC, amazing tool. Just got it on amazon. Oil filter housing gaskets. I think this seal was the leak. The start of the exhaust. Added some flex pipes too.
It still has a slow engagement when going from park to reverse, and reverse to drive, 2-4 seconds. I really only notice it when the car has not reached operating temperature. I'm not sure if this is a characteristic of this transmission, but I have read of other people having the same issue. Any thoughts on that? Thanks in advance.
Late to this party, but my 03 has a slow cold shift from P to R and then to D as well. Always has. All else is normal, and the shift is much faster when the car is warm.
Late to this party, but my 03 has a slow cold shift from P to R and then to D as well. Always has. All else is normal, and the shift is much faster when the car is warm.
FWIW, prior vehicles of mine with the same transmission picked up this issue. One started after the dealership overfilled the unit. The other (I assume) was from excessive torque input >600ft lbs).
OP: Just curious, but are you planning on replacing the line on this caliper? Looks like just the outer casing is shot, but I'm not 100% sure.
Late to this party, but my 03 has a slow cold shift from P to R and then to D as well. Always has. All else is normal, and the shift is much faster when the car is warm.
it seems to be pretty common, there are a few threads on it.
I'm suffering from "shop envy"! What I could do if I had access to all those tools...you have a very nice setup, Harambe.
Question...what is the part in the photo in which you replaced the seals you believe caused the oil leak?
Thank you. I'm pretty sure the leak ended up being the timing case cover gasket, not the round one in the oil filter housing. After seeing it I remembered doing one on a e320 awhile ago. It's a lot easier on a v6.
FWIW, prior vehicles of mine with the same transmission picked up this issue. One started after the dealership overfilled the unit. The other (I assume) was from excessive torque input >600ft lbs).
OP: Just curious, but are you planning on replacing the line on this caliper? Looks like just the outer casing is shot, but I'm not 100% sure.
I looked at the other side also, same way. The actual rubber line underneath of that rubber looks pretty solid. I might just monitor it for the time being, I think it is fine.
Nice enhancement to the exhaust. I like it.
most Benz trans are cold natured. It is normal until the engine is warmed properly.
Slow upshift and late engagement. All normal.
Enjoy.
03-02-2017, 08:13 AM
