DIY Mercedes manual transmission repair

In detail: do-it-yourself Mercedes manual transmission repair from a real master for the site my.housecope.com.

User
Messages: 3860
Registration: 11.6.2012
From: bum

simply and easily . the main thing is to disassemble it without breaking anything .. at autopsy it is better to mark it. what where if the first time is the parsing process .. and most importantly. DON'T BE AFRAID TO DO WHAT YOU NEVER DO. AFRAID TO DO WHAT IS IMPOSSIBLE TO DO. and everything will be. I believe in you

User
Messages: 6848
Registration: 30.3.2010
From: Gatchina Len region

Blessed is who the young E. Bet and in old age calmly bears
who regularly drinks vodka and does not trust anyone on credit.

The controversy on the forum is like an Olympiad among the mentally disabled, even if you won, you still d (at) a boob.

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W220 S350 2004; POLO 5 Hatch 2011; Kawasaki ZZR600 2008

Moderator
Messages: 7078
Registration: 12/31/2008
From: M.O. Pushkino

Administrator
Messages: 10885
Registration: 13.7.2007
From: Minsk

I'm not afraid of anything, it just makes sense to know the cost of the repair part. And also a busy garage for an indefinite period of time, when as a garage it is now a source of income for me.

To remove to put the box is 2 days of fucking from morning to evening. Where is the guarantee that the box will be better, or even not worse than mine?

Installation warranty. And I wrote it above to install it on ashka. and then the lover should immediately buy the seals of the semi-axles and buy oil, the last 235.10 pezdets which is not cheap.

I also thought about this, but you look at the prices for the same synchronizers and their clips, the price of 2 boxes is poured out there.

As for the vis, everything seems to be extremely clear. But the troubleshooting of bearings and all the same synchronizers is not described. How to check them, I haven't seen new ones, xs how it should look.

Video (click to play).

User
Posts: 1873
Registration: 3.7.2010
From: Nizhnevartovsk -> Minsk

User
Messages: 6848
Registration: 30.3.2010
From: Gatchina Len region

The motor, the box is given a 1 month warranty with us. I can ask you too.

Post has been edited wheelchair – 5.1.2013, 11:05

Blessed is who the young E. Bet and in old age calmly bears
who regularly drinks vodka and does not trust anyone on credit.

The controversy on the forum is like an Olympiad among the mentally disabled, even if you won, you still d (at) a boob.

Image - DIY Mercedes manual transmission repair


W220 S350 2004; POLO 5 Hatch 2011; Kawasaki ZZR600 2008

Moderator
Messages: 7078
Registration: 12/31/2008
From: M.O. Pushkino

User
Messages: 3860
Registration: 11.6.2012
From: bum

Image - DIY Mercedes manual transmission repair


W220 S350 2004; POLO 5 Hatch 2011; Kawasaki ZZR600 2008

Moderator
Messages: 7078
Registration: 12/31/2008
From: M.O. Pushkino

Moderator
Posts: 23113
Registration: 24.1.2007

Image - DIY Mercedes manual transmission repair


W220 S350 2004; POLO 5 Hatch 2011; Kawasaki ZZR600 2008

Moderator
Messages: 7078
Registration: 12/31/2008
From: M.O. Pushkino

User
Messages: 3848
Registration: 22.12.2010
From: Barnaul

User
Messages: 4860
Registration: 9.1.2007
From: Ukraine

You need to prepare yourself technically. understand what needs to be changed and what needs to be repaired.
People who are engaged in the repair of boxes - EARN.
That is. renovation brings income.
It makes sense to repair itself always if you have the strength.
If you can earn more in the time spent on repairing the box, then it is better to give it to specialists.

Himself personally repaired * an unprofitable 4-mortar * satisfied, it works. I got great pleasure from the repair.)))

Administrator
Messages: 10885
Registration: 13.7.2007
From: Minsk

They die only on the way, on ashki I personally bought 2 boxes for people. On whites, too often.
On the 202nd shed I also had problems with the box before the sale.
And what about to do, you yourself understand depending on how and what to do.

We also give it, if I take it from my own, then they will give it 3 months. Only blea, in the case of a bad box: I get on the oil seals, oil, the backstage repair kit, the rear switch is about Franklin and -2 days of life.

I also thought so, when I was sorting out the motor, I poured it into the Titan box according to the tolerance (it was not on the bank in the brochure), with warming up to operating temperature or with a 10-minute drive on the MKDA, the gears stopped normally, the rubber curtain was installed.Replaced with the original, tk. I did not do anything with the box, i.e. I could not push anything, everything became normal. Then he compared this titanium with the original, they differ decently, both in smell and in ductility. Titanium is worth something in the region of $ 8 a liter, the original is more than 30 euros.

I do not believe that in St. Petersburg the officials do not have it available, we do not even have the officials.

The flywheel is new, the clutch is new, the wings have been moved, the clutch hydraulics have been replaced. Korobas is 100%.

Everything brings income if you have something to think in your head)

Yes, strength and desire, then more than enough, in fact every now and then I do not trust anyone. Around only buggers are crooked.

Mercedes produces automatic transmissions on its own. This is done to make the cars and their behavior more in line with the company's vision of what a luxury car should be. Among modern competitors, the latest Mercedes automatic transmissions are quite reliable, but not at all eternal, like some Toyota ones. And if they fail, their repair is always very expensive and problematic. This is due to the complexity of the automatic transmission design and the very high cost of spare parts for cars of this class.

Automatic transmission Mercedes does not like aggressive driving, frequent shifting of the gear selector and dirty oil. These cars are designed for comfortable and imposing travel around the city and highway. Despite the powerful engines, these cars are anything but sporty.

These four- and five-speed automatic transmissions were produced until the mid-nineties for Mercedes S, C and E class in 140 and w 124 bodies with engines up to 6 liters. Automatic transmission 722 5 version for Mercedes in 140 and w124 bodies differs from 3 only in the presence of the 5th gear and mechanisms for its provision. For the four-stage variation, the automatic transmission repair of such a Mercedes was rarely required.

Unfortunately, the introduction of 5th gear in 140 and w124 bodies has significantly reduced gearbox life. The fifth gear in 140 and w124 bodies was the most unreliable place of this automatic transmission. Friction discs and some other paper-coated parts took 10-12 years to wear out completely, then they just crumbled. By modern standards of life, automatic transmission is still very good. In such a situation, one of the speeds usually stopped working. For the third version, the repair of the Mercedes 124 automatic transmission was rarely required before the expiration of these 10 years. The same goes for the newer 140 bodywork.

The pressure regulator in 140 and w124 bodies, if damaged, could squeeze the transmission fluid into the intake. Repairing these transmissions for the 140 and w124 bodies is so expensive that it was easier to buy a new one, especially now when parts are no longer easy to find. So it's better not to look at old Mercedes in 140 and w124 bodies without new boxes, repairs can easily exceed a couple of thousand dollars. Spare parts for them are rare and expensive.

Four-stage version of the 722.3 box for small engines of Mercedes E class. Their designs have very similar breakdowns: crumbling clutches, a pressure modulator, a centrifugal pressure regulator, if it breaks down, then the selector knob does not allow the first gear to be engaged.

This five-speed gearbox was created to replace previous generations of gearboxes.

According to experts, this box is the most problematic of the entire line of Mercedes, since in almost all cases it requires a major overhaul. Sad statistics arose due to the frank dampness of the development and from the fact that many parts from the factory were of insufficient quality. The main reasons for the failure of these boxes are the rupture of the clutch band and the failure of the hydraulic plate.

Sliding bush. Until 1999, slide bushings were the weakest point of the box, they broke one after another. The more powerful the engine was, the faster it collapsed and stopped connecting the input and output shafts, immobilizing the car. At first, a backlash formed, without any symptoms and signs, then the sleeve collapsed along the way, contaminating the entire box with its remnants.

Automatic transmission 722 6 series for Mercedes S, E and C class

After 2001, Mercedes engineers, trying to fit the automatic transmission under the new label of maximum efficiency, made it work faster. This was achieved by reducing the thickness of the friction discs, which now easily broke together with the gearbox at the slightest slip.

Factory defects of the spool led to slippage when changing the first gears. The input and output shaft sensors became a headache; The automatic transmission was taken out of emergency mode without being removed, however, not for long. The sensors still needed to be changed.

Spare parts for this automatic transmission will not be cheap. It is better not to buy used or reconditioned ones. Shafts and bearings that have worked will no longer have the strength with which they were released at the factory.

This is a five-speed automatic transmission, installed on Mercedes A class, w168, for example. Their design differs markedly from the rest of the line of automatic transmissions familiar to Mercedes. The w168 box resembles a three-shaft mechanic. Automatic transmission for w168 is the first of the Mercedes ECU developments. The unit was placed in the body of the automatic transmission itself and combined with a hydraulic plate (almost mechatronic). This "ingenious" decision led to the fact that in the event of failure of any component of the valve body, it was necessary to change it entirely in the body of the w168. Now inside the valve body there were: an electronic control unit, solenoid valves, sensors, etc. The more complex the mechanism, the easier it breaks.

Mercedes W168 with automatic transmission 722 7 series

The variator was installed on Mercedes A and B class. The electronic control unit fails, microcracks appear in the pump.

The seven-speed electro-hydraulic automatic transmission, which replaced the 722 of the sixth version, has been installed since 2005 on Mercedes E, S, and C class, for example, in the body of 211. The first series for the 211 body was so crude that not a single transmission was finalized before the end of the warranty period. Unlucky Mercedes 211 car owners, who rarely operated their executive class car and drove their 40,000–60,000 km, after the end of the warranty had to repair them at their own expense. Spare parts for 211 bodies are very expensive. After reworking almost all the mechanical parts for the 211 bodies, the transmission became quite reliable.

Valve body for automatic transmission 722 9 series for Mercedes E, S and C class

The body electronic control unit 211 is, according to the new concept, located next to the valve body. An immobolizer is mounted in it, which controls the ability to start the engine and change gear, which greatly complicates the repair. The electronic control unit is the most problematic place of the new 722. They generate a lot of software control errors and firmware, solenoids, speed sensor malfunctions or breakage of connecting lines. The interruption of the communication lines of the solenoids on 211 occurs directly on the integrated microcircuit, which is impossible to fix - everything is so small that it is simply impossible to find or solder the interrupted fragment with the help of human hands and eyes. The control unit has proven to be so technologically advanced that hackers now have the ability to hack it and erase the binding to cars. Fortunately, such control units were discontinued after 2010 for the 211 body.

The main malfunction of the mechanical part is the destruction of the rubber coating of the first gear clutch piston, which leads to slippage when the selector is switched in first and second gear. In second place is the destruction of the planetary gear set and sun gear.

Torque converter for automatic transmission 722 9 series

Less problematic, but still of poor quality, is the torque converter. Or rather, its frankly weak rivets on the damping system. Diesel variations of Mercedes have big problems during the operation of the torque converter lock, jerking and jerking when picking up speed, these problems arise due to slipping of the lock, which turns on immediately at the start of the movement,at this time, the motor torque is very large and it abrades it. Locking wear can be determined by the loss of dynamics at speeds over 80 km / h. When the blocking is erased, the automatic transmission control unit, based on the sensor readings, will clamp the power without signaling any malfunctions.

DO NOT SPEND MONEY ON REPAINING!
Now you yourself can remove any scratch from the body of your car in just 5 seconds.

This four-speed automatic transmission was installed on Mercedes Vito 638 and W168. Automatic transmissions Mercedes Vito 638 and W168 have two main faults. The first is the resolution of the sun gear bearings. The second main malfunction of the Mercedes Vito 638 and W168 automatic transmission is the failure of the torque converter lock and the subsequent breakdown of the oil pump and hub.

Automatic transmission ZF 4HP 20

Over time, automatic transmissions Mercedes Vito 638 and W168 wears out the turbine sliding support washer. Its remains contaminate and disable the valve body on the Mercedes Vito 638 and W168 automatic transmissions. The pressure regulator fails next and on the automatic transmission Mercedes Vito 638 and W168 3 and 4 speeds disappear.

In some cases, reverse gear disappears on automatic transmissions Mercedes Vito 638 and W168

Automatic transmission Mercedes Vito 638 and W168 is not serviced and does not imply an oil change. The owners of Vito 638 and W168 as a result regard these boxes as "eternal", but this, of course, is not so.

After the symptoms of abnormal behavior of the Vito 638 and W168 boxes become obvious, it is too late to go to the service and repair the Mercedes automatic transmission.

Automatic transmissions from Mercedes are of their own production and differ from their counterparts. They are considered difficult to diagnose and repair, especially new ones. It is often difficult to find a service station that will take care of repair work or carry it out properly. The repair itself costs about the same as for other automatic transmissions, but the cost of spare parts is always very high. Each Mercedes automatic transmission is accompanied by a comprehensive instruction describing the principle of operation of the box, its mechanisms and basic repair procedures, which is a significant advantage. If the car owner has the necessary knowledge and the right tool, he can try to repair the automatic transmission on his own, but it is better to leave it on the shoulders of experienced professionals. Even if the motorist had solid experience in self-repairing the mechanical part of the car, he is unlikely to be able to repair the valve body on his own. You can only carry out an oil change on your own and take the box out of emergency mode.

Mercedes-Benz Mers 124 gearbox repair