3 Tips for BULLETPROOF Mercedes-Benz Transmission (722.6 5-Speed, 722.9 7-Speed)

Рет қаралды 27,325

Күн бұрын

Пікірлер: 100

@AccentOnCars 5 ай бұрын

Tip 4: don’t lift off for downshifting or up shifting when shifting manually. The computer got you. Don’t confuse it. What other tips do people have? P.S. check out my 10 tips for bulletproof engine: kzbin.info/www/bejne/mXi3pmSMoLdpZqs

@makantahi3731 5 ай бұрын

I don't agree with two of your tips, the first one is not to change gears manually - if I let it change itself, then it shifts to a higher gear with which it cannot be accelerated, so you have to wait a few seconds to change the gear, and then it's too late, so do it manually I always keep it in a lower gear so that it spins, another tip is to relax the pressure on the gas pedal: then the gearbox has to slow down or speed up the rotating parts through friction, which wears out those friction surfaces and thus the entire gearbox, so when shifting from a lower to a higher gear, you need to ease off the gas ( don't take your foot off the gas) so that the difference in revolutions is as small as possible, when changing the gear to a lower one, increase the gas a little in order not to brake the engine and thus wear the gearbox.I have been doing this for years and when changing the oil in the gearbox, the oil is almost completely clean

@Munakas-wq3gp Ай бұрын

On the 7-speed watch out carefully while test driving, if the up-shift jerks even a little bit, run away. This is a problem that will eventually get worse and be really annoying in start and stop traffic, essentially the 1st gear doesn't engage for 0,5 seconds (occasionally, not always) and then it will slam on with a big jerk. I had this issue in my C320 4-matic (2008) and the dealership was not able to fix it.

@paul1der 3 ай бұрын

you have good sense of humor my man! keep it sprinkled in your videos, very good information! thanks

@AccentOnCars 3 ай бұрын

Thank you for the comment! Comments like this really make me happy and inspire to create more videos 🤝👍

@ginco_bnz 4 ай бұрын

That’s what the green up arrow is for when you’re in manual mode, it tells you when the car would shift for maximum fuel economy. In a non-AMG also “manual” shifting is really just a gear limiter, the car will not listen to your shift commands anyways if it doesn’t want to be in that gear.

@AlanThomas-g7b 2 ай бұрын

Nice video,I never really felt the need to shift with the shifter as you point out the computer knows.722.6 electrical connecter plug can leak and oil travels up the connecter cable to the tcu and can flood unit in severe cases!

@AccentOnCars 2 ай бұрын

Thanks 🙏 And yes, that’s another potential issue 👍

@handmade4674 5 ай бұрын

I ROFL at tip number 3 🤣 Quote of the day, “It’s not your gf leg” - accentoncars 😂

@JettaRedIII 5 ай бұрын

I believe the 7G trannies were link connected to the transmission. I know my 2004 SL500 was. My 7G-plus that I now have is completely electronically controlled.

@Munakas-wq3gp Ай бұрын

You could see the linkage at the bottom in the video he linked lol.

@goddesseddog 5 ай бұрын

it is NOT shift by wire! as your video shows, there's a mechanical link to the transmission. also, 5G tronic was introduced way back in 96 in the W140

@AccentOnCars 5 ай бұрын

Good catch. I sounded confusing about dates in the video. I was talking about the dates when 5g and 7g made appearance in w211 chassis specifically. Otherwise, 722.6 was introduced in 1996, you’re right. Regarding shift by wire. My point about not resting your hands on the shifter is more true about transmissions with mechanical connections. My car is equipped with 7g and it is shift by wire, isn’t it?

@JettaRedIII 5 ай бұрын

In addition to the mileage requirements for changing tranny fluid, there are also time limits. Some cars have low mileage but are beyond the recommended time limit for changing. For example, my 2015 SL400 has 45,000 miles. The maintenance manual says to change the tranny fluid and filter every 77,500 miles or five years. Not realizing the time limit, I just recently changed the tranny fluid (dealer service) with the car being 9 years old.

@AccentOnCars 5 ай бұрын

You’re 💯 right! Thanks for adding that to the list of recommendations for others to follow. Don’t forget to hit the like button so that more Mercedes owners see the video 🤝

@gurumeditation8911 5 ай бұрын

The 7G is a workhorse. Just keep the maintenance schedules, repair small issues immediately, keep your hands off and let it do it's own thing and it will serve you well for a lifetime. These will never pperform like DCT's, so it's pointless to try and push them.

@anona3918 23 күн бұрын

7g is garbage compared to the 5g 722.6

@anona3918 23 күн бұрын

Why want your car to shift a thousand times to catch up speed rather than have a few long and powerful gears.

@gurumeditation8911 23 күн бұрын

@@anona3918 No it's not. 5G is an old generation sequential box and is forced to use an intermediate gear when skipping gears.Huge difference. The 7G is also generally better performing with higher/more granulated resolution across the rev range (i.e better torque management) it weighs quite a bit less than the 5G and is more fuel efficient too. The 5G was fine for the years it belongs to but the 7G is the undisputed choice among the two. The 7G is probably one of best and most reliable boxes in the torque converter series from Merc. And the 9G takes things a big step up from 7G and is pretty much the best you get before going DCT.

@rodgerreed4990 Ай бұрын

I’ve seen issues with the orings on the solenoids going bad as well. You can drain the torque converter also when doing the service

@MacDaddyThis 3 ай бұрын

%100 agree!!! Do NOT keep you hand on the shifter!!! Auto or manual. These are NOT shift by wire as stated. There is a shift locator module in the floor shifter that will fail prematurely because of minor movements over time. You may physically be in drive, but as soon as that sensor looses position for a split second, limp home mode... 😭

@joeferreira657 5 күн бұрын

Great thanks

@AMG19698 2 ай бұрын

The 7G tronik uses only green fluid!.236.15 The video was very good!!!

@AccentOnCars 2 ай бұрын

Thanks for chiming in. That’s very strange about the fluid color though: my 2013 E550 had blue fluid. I saw it with my own eyes as the MB tech at the dealership emptied and filled it. The fluid in w211 E63 is red.

@munashe89 25 күн бұрын

mine is red

@AccentOnCars 25 күн бұрын

@munashe89 it should be red in earlier 7g and blue in later years 7g plus.

@teamfo95 2 ай бұрын

Great video

@AccentOnCars 2 ай бұрын

Thanks for watching! 😎

@anona3918 23 күн бұрын

722.6 was used produced in 1997

@wernerdanler2742 5 ай бұрын

I had an 01 e320 until about a year ago. It shifted very smoothly, and you could never feel it. However, if you stepped on it, even just a little, it sounded like someone shifting a manual geatbox. Kind of a clutching gear change sound, but you didn't feel it. I thought it was the weirdest automatic gearbox I have ever had, but kinda cool. Is that normal for these?

@bushdance6 2 ай бұрын

In 6 (or more, presumably) cylinder models, the transmission is programmed to take off in 2nd gear, unless you hit the gas/accelerator beyond a threshold, which will initiate an immediate kickdown to 1st for takeoff. That might be what you've perceived... though you didn't specifically indicate takeoff as the event. Otherwise, you might just be describing a generic kickdown, from any speed where a lower gear is available and called for via the gas/accelerator.

@Munakas-wq3gp Ай бұрын

You most likely had a worn transmission bushing which let the transmission move too much and cause a sound while accelerating harder. The gearbox itself makes practically zero sound.

@TheMuzikall 20 күн бұрын

Be Specific Benz with 4 speed Automatic are unbreakable W124 W201 W126 W140 After that the 5 speed boxes onwards. were troublesome ✅

@stevanmilenkovic4064 4 ай бұрын

Noone asked nor mentioned is it recommended to change it to N when you are waiting, for example for a red light. I practice to change it to N when I know I will wait more than 10,20 seconds, because of heat generating in torque converter. Otherwise, when I am in dense traffic with short stops, I don't move it from D. Someone says this should be done, someone says not, but my logic is why to torture it when you know that you will be at standstill for half a minute or minute, change it to N to let it "relax"... I see you are well informed about those stuff, i will like to hear your opinion.

@AccentOnCars 4 ай бұрын

That’s a good question. I put it in neutral only if the stopping time is more than a minute. For example, if the traffic fully stopped or there is a train passing. I don’t shift into neutral on red lights and stuff. The computer does all necessary things for you. Actually, I read that you “hurt” more by frequent shifts from D-N-D as the converter and engines are out of sync when in N, and shifting into D causes a minor slippage until the clutch locks. In a nutshell, don’t overthink it. Enjoy it.

@stevanmilenkovic4064 4 ай бұрын

@@AccentOnCars Thank you, брате😁 That is how I actually do, but just needed a confirmation from you.

@AccentOnCars 4 ай бұрын

🤝🤝🤝

@vandijk1698 8 күн бұрын

I also shift to N for longer stops (+ 1 minute) and when I’ve had to brake hard, to let the discs cool so they don’t get distorted. I’m always able to get maximum lifespan out of my discs without any vibrations.

@iwanbotak08 5 ай бұрын

Mine 7G tronic plus, electric plate replaced on 80km😢

@AccentOnCars 5 ай бұрын

Sorry to hear that. Mine was replaced too. It happens sometimes. 😉

@phillm156 5 ай бұрын

Great advice. The same can be said for manual transmission guys who rest their hand on the shifter. You are wearing out the throw-out bearing. What I really like about the AMG 7speed is the ability manually lockout higher gears. In sport mode I can use the paddles and limit the amount of gears. It seems to hold each gears longer before upshifting.

@AccentOnCars 5 ай бұрын

🤝

@energymc22 5 ай бұрын

Not true. The throw out bearing is not linked to the gear shifter in any way.

@phillm156 5 ай бұрын

@@energymc22 my mistake. It’s the shift fork and collar that will be damaged.

@pfoxhound 5 ай бұрын

At high mileage toque converter lock solenoid will fix the problem.

@AccentOnCars 5 ай бұрын

👍

@confoozled3737 2 ай бұрын

If a 722.9+ has not been serviced, say for 10 years or 125k+ miles, is it still advisable to change the fluid or should you leave it alone? There seems to be conflicting information in online communities. Some will say change the fluid ASAP, and others will talk of varnish buildup on the valve body being dislodged by the new detergent fluid and therefore causing issues.

@AccentOnCars 2 ай бұрын

I don’t have a definitive answer either. If we think logically, if the oil was dirty then the problems would reveal themselves or will likely start to happen soon anyway even if you don’t touch it. So it may be worth replacing fluid, filter and examining the condition at the same time. Maybe some cleaning of the components will be needed. On the other hand, if you’re not planning on keeping the car much longer then don’t bother.

@totome2206 2 ай бұрын

I was exactly in the same situation. I did a fluid and filter change Everything was ok, no problem at all

@confoozled3737 2 ай бұрын

@@totome2206 Thank you for your response!

@commodoreras 4 күн бұрын

Change the fluid, filter and gasket, do NOT do a flush. You will be fine. I changed my buddy’s fluid at 136K that was the first change, after the change, shifting improved dramatically, have done another fluid filter and gasket job on that at 150K and after that every 40K changes. He sold the car at 365K a year ago and it was still the original transmission. 2005 E320 4Matic with 722.6

@confoozled3737 4 күн бұрын

@@commodoreras Again, very much appreciate the feedback. 🙏

@seryil4806 5 ай бұрын

I have a 9g and sometimes gears get stack on 2nd gear or 1st! Sometimes there is different symptoms like clutch slip feeling. I usually switch off and back on again and gets back to normal. Millage is 72k. I am suspicious about speed sensor but will risk a transmission oil and filter change and see what happens. Just waiting for better weather in uk lol😂 when I asked mercedes about conducting plate they said it needs to be programmed and they wouldn’t sell it to anyone but there authorised repairers. they sell reconditioned units so they want old one back.

@AccentOnCars 5 ай бұрын

Get it diagnosed for sure. Changing the fluids may help. Give it a shot it you are willing to try. And that’s right, I got mine done by an authorized independent shop too.

@seryil4806 5 ай бұрын

I can’t believe you done the head bolts and all the other work but didn’t attempt gearbox. Makes me think shell I just get it done 🤔

@AccentOnCars 5 ай бұрын

I don’t have a lift and don’t like being under the car on jack stands for too long.

@seryil4806 5 ай бұрын

😂 I feel the same about jacks and stands. I was going to use railway wood ( thick) and raise the suspension as i have the raising option 😂

@thangqt1859 3 ай бұрын

Sounds like transmission oil low. I once changed my transmission oil, and didn't put enough in, it slipped 1 to 2 gear. I topped up and issues went away.

@Random38346 4 ай бұрын

7g-tronic jerky when i press the gas when the car it's down shifting automatically I fell a jerk like if I don't give the car enough time to down shift, and the car car has to down shift abruptly

@AccentOnCars 4 ай бұрын

Very likely it’s the conductor plate like I discussed in the video .

@jdm542 2 ай бұрын

i have the 2 - 1 downshift clunk, like a loud clunk sound when coming to a stop, i have been going crazy about to do a rebuild, have you heard of this?

@AccentOnCars 2 ай бұрын

Most likely it’s one of the issues I talked about in the video. 2-1 can be a bit rough at times but clunking is not a good sign.

@LevisAlimuci 2 ай бұрын

Hello! Thanks for the informative video! I have a cls 350 cdi 2012 with thr 722.9. When I am on Economy, in traffic situations, the shift from 2nd to 3d or 3d to 2nd feels like an earlier shift of a manual car. It's like you when you release the clutch a bit early on a manual car and you feel that the car "breaks" a short bit and you are pushed a little bit forward. I hope you understand what I mean. Its not a hit but I definitely feel the gear change and happens only when i move from still in traffic or when upshifts 2nd to 3d or downshifts 3d to 2nd. Based on your experience what could it be? Already did the reset and adaption from star, changed oil and did the manual reset with key and throttle pedal. Regards!

@AccentOnCars 2 ай бұрын

Sorry to hear about that. It’s really hard to say with 100% certainty without diagnosis, but some generic suggestions are: - service the transmission fluid and filter. Inspect the fluid for any metallic shavings - have latest transmission control unit software version installed and calibrated

@deyoviC 5 ай бұрын

6:28 Can you please explain how did your speed sensor failure manifest itself? What were the symptoms? Sometimes I experience slippage from 1st to 2nd and 2nd to 3rd and rough downshifts uphill or downhill. Not all the time, sometimes it happens when cold, sometimes when hot... I have the 722.6 or 5G-Tronic. Thanks.

@AccentOnCars 5 ай бұрын

Mine would get stuck in gear. One time it got stuck in 5th gear as I was merging the highway at slow speeds. It took me ages to build speed. I was so embarrassed 😂 Your symptoms are definitely not good. Definitely could be the conductor plate. But slippage is unfortunately the sign of hardware failures. Get it scanned. Hopefully it doesn’t actually slip and just feels like that to you. I used to have e350 with 5g and ignored rough shifts until the transmission took a cr*p completely. It should shift smoothly.

@deyoviC 5 ай бұрын

@@AccentOnCars They can identify slipping by scannig? I thought they need to drive the car. I might take it to a well known local shop that specifies in repairing conductor plates and components. Thanks

@Spidepig09 4 ай бұрын

@@AccentOnCarswhat were rough shifts like?

@AccentOnCars 4 ай бұрын

Down and up shifts are roughly. Almost feels like clunking noise from under you. Happens when slowing down usually.

@Spidepig09 4 ай бұрын

@@AccentOnCars man mine shifts like that sometimes but Ive done the proper maintenance since new.. changing the conductor plate helped a lot though. So might be a solenoid.

@LOMBAX0RATCHET 5 ай бұрын

MCT AMG 7G’s can feel jerky on down shift as a general characteristic.

@AccentOnCars 5 ай бұрын

Haven’t had MCT equipped car, I have heard later year ones are smoother. Is that true?

@kevhauser 16 күн бұрын

@@AccentOnCars Cold startup under 50 degrees F results in agressive Start Off Clutch to grab too much. Causes bucking...aggravating. Mercedes was aware 2009 SL63 AMG. I have to slowly engage the Slowly engage STO to avoid harsh engagement.

@MohamedAli965 5 ай бұрын

What about long shifts? I dont feel like my transmission is as snappy as the clip you showed on this video

@AccentOnCars 5 ай бұрын

AMG transmissions are snappier than non-AMG. If your transmission doesn’t feel like it’s slipping and operates well otherwise, then it’s probably just fine.

@DamiansChannel 5 ай бұрын

What's with the stupid notification crap? On that reason alone, I'm not subscribing. It's annoying..

@ShowMeWhatINeedToKnow 4 ай бұрын

Chill, bro.

@SDav21 29 күн бұрын

I have a 2014 E350 V6 diesel with the 7g tronic. When it's cold, it shifts up gears fine. But when I slow down it harshly kicks down back to first. But only about 3 times until it has warmed up then it's smooth again. Why?

@AccentOnCars 28 күн бұрын

These tend to act up when cold. If the issue persists regardless of the temp, it’s time to look further. Also, make sure you service it on time and software updates are installed.

@robertlifea6405 18 күн бұрын

change oil

@W212jay 5 ай бұрын

So if I have paddle shifters I shouldn’t shift it?

@AccentOnCars 5 ай бұрын

I explained what I mean, when to shift and not shift manually, what’s good and not good for the transmission in the video 👋

@franciscocaetano2908 Ай бұрын

🇵🇹My Mercedes A180 D, automatic transmission, has an extremely uncomfortable symptom. After the start/stop acts, when starting off there is a “jolt” or sudden movement that, in addition to being uncomfortable for the driver's neck, makes parking maneuvers extremely difficult and dangerous! I delivered the car to Mercedes with the aforementioned complaint and saying that this problem had not occurred before. It came into existence after a review with a gearbox oil change at Mercedes. At Mercedes they told me that there is no defect in the gearbox or clutch. And this feeling is normal! My advice is, don't buy the Mercedes A 180D and if you already have one, wait because one of these days you will suffer from this sudden crash not recognized by Mercedes🤨!!!

@Munakas-wq3gp Ай бұрын

I had this issue in my '08 C320 4-matic. The dealership tried reprogramming and oil change, didn't fix the issue.

@franciscocaetano2908 Ай бұрын

@@Munakas-wq3gp 🇵🇹Dear friend, I can say that in Portugal I finally found a workshop outside of Mercedes dealerships that solved my problem. What he did was program the clutch and gearbox, both with the car stationary and in motion, always controlling the engine temperature, in addition to controlling the temperature of the gearbox oil. I can't say anything more, simply that the car was impeccable!!!⭐⭐⭐⭐⭐!

@Munakas-wq3gp Ай бұрын

@@franciscocaetano2908 Nice to hear it worked for you. I ended up trading my car for a CLK500 with the old bulletproof 722.6. During the first winter I realized I made a horrible mistake to go back to rear wheel drive 😂 Kept that car for only 2 years and then went back to 4-matics.