4MATIC System - Smoothness of Shifting
Member
Joined: Oct 2006
Posts: 162
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German
4 matic rear end clunk/tug
BUMP!!!!!
Been searching for answers, I figure I revive this thread.
Anybody know for certain what causes the clunk/tug on the rear end?
I have noticed on mine it only does it when not under load,( foot off the gas)
essentially while coasting at slow speeds and then when transmission shifts the jab sound resonates from the rear. Normal/spirited driving transmission shifts like butter.
Hoping its just a mount, flex disc and not TC.
Been searching for answers, I figure I revive this thread.
Anybody know for certain what causes the clunk/tug on the rear end?
I have noticed on mine it only does it when not under load,( foot off the gas)
essentially while coasting at slow speeds and then when transmission shifts the jab sound resonates from the rear. Normal/spirited driving transmission shifts like butter.
Hoping its just a mount, flex disc and not TC.
Senior Member
Joined: Dec 2006
Posts: 299
Likes: 15
From: Boston, MA
2002 E320 4matic 92K (bought 12/20/06). 2000 E430 4matic (RIP 12/9/06) :(
Seems to happen to enough people that it can be considered "normal", I guess, unless anyone here has had serious tranny problems in conjunction with this symptom? Thanks for bumping, Martz!
Senior Member
Joined: Dec 2006
Posts: 299
Likes: 15
From: Boston, MA
2002 E320 4matic 92K (bought 12/20/06). 2000 E430 4matic (RIP 12/9/06) :(
I agree with you about Foreign Motors West (now part of the Herb Chambers Family). Try visiting the guys at EAS in Waltham. Check them out at www.virtualeas.com They are great! They keep my 2000 E430 4-matic in good working order.
Seriously, I never would have considered selling it even at $4 a gallon. I have heard great things about EAS from some of my father's customers (he owns a business on the same street). I go to Accel on Linden Street because of the relationship my father built w/ them when he owned an Alfa 164L back in the day; they used to do work for Alfa when they were right next door to that DD/Petco/CVS plaza. Do you live in Waltham, Boston? Have I asked you this already?
Junior Member
Joined: Sep 2008
Posts: 17
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From: SFV, Los Angeles
2006 C230 Sport; 2002 C230 Coupe; 1979 Porsche 911
It's not exactly a problem with the transmission shifting per se.... the transmission shifts beautifully and I love it..
The problem is more like a slight "clunking" that doesn't happen all the time and generally seems to feel as if it's coming from the rear of the car... Basically, it feels like slack in the drivetrain....
Let's use this example.... doing about 15mph foot off gas and brake and coming to a red light. Light turns green before you stop, you floor it... then you feel a light "thunk" from the rear of the car....
I don't know how to describe it really, it feels similar to driving a land rover...
I hate to bring it to the dealer again and be charged for finding "nothing wrong"...
The problem is more like a slight "clunking" that doesn't happen all the time and generally seems to feel as if it's coming from the rear of the car... Basically, it feels like slack in the drivetrain....
Let's use this example.... doing about 15mph foot off gas and brake and coming to a red light. Light turns green before you stop, you floor it... then you feel a light "thunk" from the rear of the car....
I don't know how to describe it really, it feels similar to driving a land rover...
I hate to bring it to the dealer again and be charged for finding "nothing wrong"...
Senior Member
Joined: Sep 2008
Posts: 293
Likes: 3
From: Chicago
2002 E430 4MATIC
I have noticed on mine it only does it when not under load,( foot off the gas)
essentially while coasting at slow speeds and then when transmission shifts the jab sound resonates from the rear. Normal/spirited driving transmission shifts like butter.
I have the same symptom - always under light throttle especially right after coasting at slow speed. 90% of the time it is an upshift but I have felt it on a downshift, but never under any kind of spirited driving. I'm of the opinion it's the rear differential putting some slack in the drive train.
I had something similar in our old '97 but that was directly related to a delayed and hard 2/3 upshift under light load - turned out to be some kind of sticking valve in the tranny. It felt like it was just banging into gear.
essentially while coasting at slow speeds and then when transmission shifts the jab sound resonates from the rear. Normal/spirited driving transmission shifts like butter.
I have the same symptom - always under light throttle especially right after coasting at slow speed. 90% of the time it is an upshift but I have felt it on a downshift, but never under any kind of spirited driving. I'm of the opinion it's the rear differential putting some slack in the drive train.
I had something similar in our old '97 but that was directly related to a delayed and hard 2/3 upshift under light load - turned out to be some kind of sticking valve in the tranny. It felt like it was just banging into gear.
Senior Member
Joined: Dec 2006
Posts: 299
Likes: 15
From: Boston, MA
2002 E320 4matic 92K (bought 12/20/06). 2000 E430 4matic (RIP 12/9/06) :(
Since the transmissions in these cars are generally long-lasting and reliable, I don't think it's a symptom of a major problem since so many owners tend to have this issue. You have to consider that the shifting is computerized and changes w/ the driving style in this model, and as far as I know this is one of the first benz models to have such a transmission, so maybe it's just a kink that got worked out in the w211?
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Change
the transmission fluid ,filter and transfer case fluid and rear diff fluid.
the kink lies in the lifetime fluid claim that benz came up with for the 722.6 trans.Now they say every 39k miles.
mb fluid only.Diy on benzworld.org w210 section and mercedesshop.com
if anyone reading this has a newer model without the trans dipstick tube they can't do the diy,as it takes a special machine to fill the trans via the vent tube located on the pan.
A 4matic should be seamless in shifting,fluid change will help and resetting the tcu via the trans adapt feature will also help a bit.
ohlord
the kink lies in the lifetime fluid claim that benz came up with for the 722.6 trans.Now they say every 39k miles.
mb fluid only.Diy on benzworld.org w210 section and mercedesshop.com
if anyone reading this has a newer model without the trans dipstick tube they can't do the diy,as it takes a special machine to fill the trans via the vent tube located on the pan.
A 4matic should be seamless in shifting,fluid change will help and resetting the tcu via the trans adapt feature will also help a bit.
ohlord
Senior Member
Joined: Jun 2008
Posts: 259
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From: COSTA MESA
99' E320 4MATIC ESTATE / 92' 190E 2.6
Same klunk here on my 99 4matic wagon. it just seems like i feel it when going from braking ti back on accelerator. It is subtle as stated by others. I have just performed the 100,000 mile "tune up" and had all the proper fluids replaced or topped off/checked etc. Its still there but she purrs like a kitten and there were no leaks from anything. I took it to Jeff at OC Benz in Costa Mesa CA. They treat you right!
Also had front and rear suspension done on the 92" 190e/front brakes and rotors/belt and tensioners/fluids/filters and a few other tweaks. $1500.00 and well worth it as the car feels like new. It is amazing that a 16 year old car with 160,000 miles just keeps on going and looks great too. Here in So Cal, there are so many exotic/luxury cars and still you see 190's everywhere. Mercedes owner for Life. Buy them used and maintain. They will last and last!
Also had front and rear suspension done on the 92" 190e/front brakes and rotors/belt and tensioners/fluids/filters and a few other tweaks. $1500.00 and well worth it as the car feels like new. It is amazing that a 16 year old car with 160,000 miles just keeps on going and looks great too. Here in So Cal, there are so many exotic/luxury cars and still you see 190's everywhere. Mercedes owner for Life. Buy them used and maintain. They will last and last!
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Yes
but have you had your trans fluid and filter changed.1999 had a torque converter drain so you can drain almost all the fluid.Per the diy.Or your trusted indie can do it
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Joined: Oct 2006
Posts: 162
Likes: 2
German
the transmission fluid ,filter and transfer case fluid and rear diff fluid.
the kink lies in the lifetime fluid claim that benz came up with for the 722.6 trans.Now they say every 39k miles.
mb fluid only.Diy on benzworld.org w210 section and mercedesshop.com
if anyone reading this has a newer model without the trans dipstick tube they can't do the diy,as it takes a special machine to fill the trans via the vent tube located on the pan.
A 4matic should be seamless in shifting,fluid change will help and resetting the tcu via the trans adapt feature will also help a bit.
ohlord
the kink lies in the lifetime fluid claim that benz came up with for the 722.6 trans.Now they say every 39k miles.
mb fluid only.Diy on benzworld.org w210 section and mercedesshop.com
if anyone reading this has a newer model without the trans dipstick tube they can't do the diy,as it takes a special machine to fill the trans via the vent tube located on the pan.
A 4matic should be seamless in shifting,fluid change will help and resetting the tcu via the trans adapt feature will also help a bit.
ohlord
Transfer case is sealed, there is a fill plug but no drain plug and mind you it's a Mercedes!!!!
Rear diff was serviced !
Front diff is sealed!
According to my mechanic my flex disc, trans mounts, engine mount's look good. I am still hoping that maybe the flex disc may look good , but still could use an R & R which is what I am going to try eventually.
The kink does not lie on the fluids. As much I respect your knowledge on these cars, I have to disagree with you on this one. It's more than just a fluid change. Look at this thread at 15k miles he had the same issue. Problem found was engine mount was bad or so they say......may have to try that too.
Another said Planetary gears on the TC....OUCH!!!! dont like that!
http://www.benzworld.org/forums/w210...20-4matic.html
Last edited by martz; Sep 26, 2008 at 01:03 PM.
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Not
saying in all cases ,but at 100k miles if a 722.6 is shifting poorly a fluid change is in order,sooner than later
your case sounds like something entirely different.
722.6 transfer case fluid can be changed and mercedes on the later model 722.6 states at 39k miles.Maybe your indie does not have the tools to do it?Several members have changed their transfer case fluid,don't know why yours would be any different.They suck it out.
I hope they find your problem before it gets worse
your case sounds like something entirely different.
722.6 transfer case fluid can be changed and mercedes on the later model 722.6 states at 39k miles.Maybe your indie does not have the tools to do it?Several members have changed their transfer case fluid,don't know why yours would be any different.They suck it out.
I hope they find your problem before it gets worse
Member
Joined: Oct 2006
Posts: 162
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German
saying in all cases ,but at 100k miles if a 722.6 is shifting poorly a fluid change is in order,sooner than later
your case sounds like something entirely different.
722.6 transfer case fluid can be changed and mercedes on the later model 722.6 states at 39k miles.Maybe your indie does not have the tools to do it?Several members have changed their transfer case fluid,don't know why yours would be any different.They suck it out.
I hope they find your problem before it gets worse
your case sounds like something entirely different.
722.6 transfer case fluid can be changed and mercedes on the later model 722.6 states at 39k miles.Maybe your indie does not have the tools to do it?Several members have changed their transfer case fluid,don't know why yours would be any different.They suck it out.
I hope they find your problem before it gets worse
TC... They suck it out! .. any threads you can point me to , for specifics? Can a manual extractor accomplish this? Or must it be one of those sophisticated ones. My indie was looking for a drain plug. ( I also assumed there was one) Heck, I only found out there is a fill hole by searching through benzworld and from what I've read its not really that easy to get to.
BTW I have 85k on the clock. I cant say that it shifts poorly, more like a flaw within the 4 matic drivetrain. Are you implying that fluid change is the fix?
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Man
that is a tough call.The service sheet calls for fluid change at 39k ,and it is a B to get to.Give me about a week and I will get you a diy or more info.I am going to be dropping one with a local member sometime in the next week or so.
Have you reset the trans control?
Have you reset the trans control?
Member
Joined: Nov 2005
Posts: 213
Likes: 1
From: New England
2000 E 320S4 210.282 4Matic Estate
Fix is planetary gearset
BUMP!!!!!
Been searching for answers, I figure I revive this thread.
Anybody know for certain what causes the clunk/tug on the rear end?
I have noticed on mine it only does it when not under load,( foot off the gas)
essentially while coasting at slow speeds and then when transmission shifts the jab sound resonates from the rear. Normal/spirited driving transmission shifts like butter.
Hoping its just a mount, flex disc and not TC.
Been searching for answers, I figure I revive this thread.
Anybody know for certain what causes the clunk/tug on the rear end?
I have noticed on mine it only does it when not under load,( foot off the gas)
essentially while coasting at slow speeds and then when transmission shifts the jab sound resonates from the rear. Normal/spirited driving transmission shifts like butter.
Hoping its just a mount, flex disc and not TC.
Clunk occurs when the car downshifts into first gear as you're rolling to a stop. I found that by switching transmission program into W mode permanently helps a lot. You don’t get to hear the clunk that often.
There are a few threads on the forums on the topic but for some reason word never spread out as to the cause and fix of the problem, which has been posted only a couple of times without any major public reaction. See:
http://www.benzworld.org/forums/w210...-e320-awd.html
https://mbworld.org/forums/showthread.php?t=72671
This is the fix:
Slack in the planetary gearset: the recommended repair under TSB AF28_10-U-1600AG is to replace the planetary gearset with a friction plate.
Hope it helps.
Cheers.
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From: Philadelphia area
2010 ML550, 2010 E350 4M, 1966 Corvette Convt C2
Member
Joined: Oct 2006
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German
TCU reset
I reset my TCU and you know what, the clunking, slight jolt has disappeared. I hope I am not jinxing myself. I also can not correlate on how and why.
Logic points to the driveshaft and is surrounding parts. Or worse case scenario TC.
Ohlord....thanks for the tip.
Logic points to the driveshaft and is surrounding parts. Or worse case scenario TC.
Ohlord
....thanks for the tip.
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From: Seattle WA
99 E320
for models with electronic, adaptive transmissions:
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
use the SEARCH feature to review past posts/threads
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
use the SEARCH feature to review past posts/threads
