C36 AMG, C43 AMG (W202) 1995 - 2000

Tranny issues...oh boy

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Old May 4, 2010 | 08:23 PM
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From: north jersey
99 c43,90 mustang gt supercharged convertible,07 acura tl type s, Hummer H3t pickup
Tranny issues...oh boy

Drove the car for an hr trip down to the jersey shore it ran flawless.Get off the exit coast to about 20 mph thn get on it HARD.Tranny drops down engine revs car hesitates hesitates then i let off it ''catches'' then goes and shifts flawlessly for the next 85 miles home...and i got on it trying to duplicate it only did it once when I manually shifted into 2nd romped on it itrevved and didnt go anywhere for a second then rocked foward....wtf! All shift thru the ranges are buttery smooth and firm as they should be under mid/heavy load.Purchased the car in jan of this year and hve put only about 500 miles on it since running flawlessly[sunday car].The trans was rebuilt about 30k ago.Receipt says gear assembly replaced front sun gear 30 teeth,rear etc.There is no avaliable warranty.I had an engine oil leak which was repaired recently it was the oil cooler and noticed the blue trans plug which runs under the trans was covered pretty good with engine oil,could ths be the cause,any idead before i bring it in??
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Old May 5, 2010 | 12:44 PM
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I've had some similar occurrances with my tranny over the ~20k miles and 4.5 years I've owned my C43. There are only 45k miles on the car now.

Just like you experienced on the rest of your drive home, there have been no other symptoms. And, no other negative issues have developed with my car over the longer term. I've written the behavior off as something endemic to the mechanics or software, and not a failure.

I've had the trans fluid "changed" twice, but that's really only 4 quarts out of the 12 that the trans and converter hold. It's generally recommended to do this service to help with the life of the trans.
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Old May 5, 2010 | 06:16 PM
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99 c43,90 mustang gt supercharged convertible,07 acura tl type s, Hummer H3t pickup
HMM.....Thats VERY interesting!! Yes and im having the tranny flushed new gasket and filter on sat.Just spoke to the previous owner and the trans rebuilt@90k car now has 136k.Time for a servicing.Its weird ths happened after i did the ecu reset.After i get it serviced im goin to reset again and take it from there.Funny as it shifts great and there are no noises.Just that one event
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Old May 5, 2010 | 06:22 PM
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1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
Originally Posted by John-in-Dallas
I've had some similar occurrances with my tranny over the ~20k miles and 4.5 years I've owned my C43. There are only 45k miles on the car now.

Just like you experienced on the rest of your drive home, there have been no other symptoms. And, no other negative issues have developed with my car over the longer term. I've written the behavior off as something endemic to the mechanics or software, and not a failure.

I've had the trans fluid "changed" twice, but that's really only 4 quarts out of the 12 that the trans and converter hold. It's generally recommended to do this service to help with the life of the trans.
The tranny holds 9.6 quarts according to Mercedes. If you take it to the stealership they have a machine that will force out all of the old fluid (including the torque converter) and put in new tranny fluid, costs around $250-$300. The problem with the leaking oil following the wire, this is a common issue with the C43, the wire connector on the transmission leaks fluid into the wiring harness. If it is not repaired, the oil will migrate through the wiring harness and damage the transmission control module. A new harness and control module will be needed to fix the problem.
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Old May 5, 2010 | 06:25 PM
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"Tranny drops down engine revs car hesitates hesitates then i let off it ''catches'' then goes and shifts flawlessly for the next 85 miles home" Are you sure it's a tranny problem??? I was having a hesitation problem and it turned out to be 2 bad plug wires and a MAF. New wires new MAF and shes FLYING!!!!
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Old May 5, 2010 | 06:30 PM
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1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
Originally Posted by John-in-Dallas
I've had some similar occurrances with my tranny over the ~20k miles and 4.5 years I've owned my C43. There are only 45k miles on the car now.

Just like you experienced on the rest of your drive home, there have been no other symptoms. And, no other negative issues have developed with my car over the longer term. I've written the behavior off as something endemic to the mechanics or software, and not a failure.

I've had the trans fluid "changed" twice, but that's really only 4 quarts out of the 12 that the trans and converter hold. It's generally recommended to do this service to help with the life of the trans.
I WISH i had 45K on my C43.......LOL I thought my 108K was low
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Old May 5, 2010 | 10:03 PM
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99 c43,90 mustang gt supercharged convertible,07 acura tl type s, Hummer H3t pickup
Now that i really think about it when i was able to duplicate the quirk I had manually shifted into second and romped on it it immediatly bogged then shot foward.It might be the MAF after all as that doesnt sound like a trans problem.Getting it checked saturday.
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Old May 6, 2010 | 03:24 PM
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Get back to us and let us know what it was. My tranny acts weird sometimes too. Ill bet anything its my maf coz I have K&N filters
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Old May 6, 2010 | 05:43 PM
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Originally Posted by PJmak
Get back to us and let us know what it was. My tranny acts weird sometimes too. Ill bet anything its my maf coz I have K&N filters
The K&N filters are notorious for gumming up the MAF. The oil the K&N filter uses is the culprit. Be sure to LIGHTLY oil the filter to avoid this problem.
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Old May 6, 2010 | 06:47 PM
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99 c43,90 mustang gt supercharged convertible,07 acura tl type s, Hummer H3t pickup
Yes I will get back to you all saturday.The car goes into an independant shop My realitive reccommended.Called Globe mercedes here in Jersey to get the price on a tranny flush and was quoted get this $429.00 ARE YOU SERIOUS.
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Old May 6, 2010 | 06:52 PM
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Also the MAF has never been changed has 136k on it.What do you think,possible culprit???
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Old May 6, 2010 | 08:00 PM
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From: PDX
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Originally Posted by 99CEEFOURTHREE
Also the MAF has never been changed has 136k on it.What do you think,possible culprit???
Mine went bad @ 107K, wouldn't be surprised if that was the issue.
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Old May 6, 2010 | 08:06 PM
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Originally Posted by 99CEEFOURTHREE
Yes I will get back to you all saturday.The car goes into an independant shop My realitive reccommended.Called Globe mercedes here in Jersey to get the price on a tranny flush and was quoted get this $429.00 ARE YOU SERIOUS.
I suggest you take it to the stealership, they have a special machine that will force out ALL of the fluid (tranny + torque converter) not to mention I called an independent shop and they told me it was 9.9 quarts of some weird gear oil, AMG says it's 9.6 quarts of MB tranny fluid. I tend to trust the manufacturer, especially when it comes to potentially over filling my tranny. I JUST had this done at the local mercedes shop here (portland, OR) and paid $235 for the whole shebang-a-bang (flush + filter + labor). At the time I thought I was paying a lot but it sounds like I got a good deal.
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Old May 6, 2010 | 08:28 PM
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Hi all - newbie to the forum and have a question. What is "MAF"? I'm guessing it's the computer control module?
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Old May 6, 2010 | 09:58 PM
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Originally Posted by Steve155
Hi all - newbie to the forum and have a question. What is "MAF"? I'm guessing it's the computer control module?
(M)*** (A)ir (F)low sesnsor
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Old May 7, 2010 | 01:58 AM
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12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
Search

Google is your friend and Wikipedia a good source of info:http://en.wikipedia.org/wiki/Mass_airflow_sensor
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Old May 7, 2010 | 02:02 AM
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Originally Posted by 503C43 ////AMG
I suggest you take it to the stealership, they have a special machine that will force out ALL of the fluid (tranny + torque converter) not to mention I called an independent shop and they told me it was 9.9 quarts of some weird gear oil, AMG says it's 9.6 quarts of MB tranny fluid. I tend to trust the manufacturer, especially when it comes to potentially over filling my tranny. I JUST had this done at the local mercedes shop here (portland, OR) and paid $235 for the whole shebang-a-bang (flush + filter + labor). At the time I thought I was paying a lot but it sounds like I got a good deal.
I think you sure did get a good deal there. Certainly here the ATF would cost at least that price and I use an independant mecanic (67 years old and a bottomless pit of knowledge) who is MB trained.
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Old May 7, 2010 | 10:19 AM
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Thank you for the info - I appreciate it. I'll ck out the link as well.
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Old May 7, 2010 | 10:45 AM
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hey guys just a cool tip go to the local auto store and get your self a mass air flow cleaner.. we in the shop and a lot of shops use this cleaner to diognose it. if we on flat rate we just get the car in spray the cleaner do not use qu tips lol. just use the cleaner u will be suprised how well u get the car response. try it everytime u change your air filter its a good service tip.
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Old May 7, 2010 | 05:07 PM
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Thanks

Great tip. Will keep in mind for next time.
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Old May 8, 2010 | 02:19 PM
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99 c43,90 mustang gt supercharged convertible,07 acura tl type s, Hummer H3t pickup
MAF gummed up! phheewwww! Didn't think it was the trans as it was rebuilt 40k ago.New air filters,mobil 1 change,new maf she's ROCKIN!!!
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Old May 9, 2010 | 02:36 AM
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Originally Posted by 503C43 ////AMG
Mine went bad @ 107K, wouldn't be surprised if that was the issue.
HAHA told you, glad to hear you are up and running again
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