I need to know what transmission will fit my 1990 190E 2.6 automatic. What is my transmission number 722.4xx? It is the original. What do the last two numbers (xx) mean anyways? I have seen 722.3xx or 722.4xx but I don't know what that means. I have seen a few rebuilt transmissions, in particular a 1990 190E 2.6 (722.4xx) and also a 1990 300E (722.429 I think, or to be safe 722.4xx). Will a 300E transmission be a simple plug n play installation? If there are two different models, i.e., 300E and 190E both having a 722.4xx, are they interchangeable without doing anything weird other than bolting it on to the motor and calling it a day? Sorry for so many questions in post, just trying to make sure those that reply aren't confused and can answer accordingly.
Cheers!

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1990 190E 3.0L

722.3 is a 4 speed auto

722.4 is similar looking 4 speed but smaller than the 722.3

722.5 is a 722.3 with a built in overdrive unit at the end.

Near as I can tell none are a direct bolt in with each other and may require drive shaft mods.

The xx at the end is a variation code, that is sometimes shift points / pressures / number of clutch packs not sure what will interchange as there are too many.

Have a look at car-part.com and sniff around for interchanges, the info isn't 100% ( sometimes you can go one way and not the other , sometimes they don't list parts that will interchange. ) but will give you a pretty good idea what will work.

You need a transmission from another 2.6 (the 190E 2.6 or 260E) to get the right valve body and governor setup. There are some changes over the years that will include some extra hydraulic plumbing on the left (driver's side in the US).

Here's list of a zillion benz transmission types...

Mercedes Benz 722.6 transmission application guide

-CTH

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- cth350@gmail.com
http://www.111lakeside.com/

Some of that left side plumbing is a governor bleed. It reduces gov pressure to cause late shifts so the cats warm up faster.

Does the 260E need to be a 1990 as well?

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1990 190E 3.0L

MODEL...... YEARS...... CHASSIS.. ENGINE ..........TRANSMISSION ........STEERING

190E 2.6... 1986-93... 201.029... 103.942 KE ......717.432/722.409 .........765.903

Attached Files

Fault code scanner_model engine.pdf (80.1 KB, 561 views)

W201's used the 722.4. W124 260e's 300e 2.6 and some early 300d's used the 722.409

The 2.6 litre engine of either the W201 190e 2.6 or the W124 260e (300e 2.6) use the 722.409 transmission.

The 722.4 transmissions in the W124's and W201's used a different ratio diff than the 722.3 equipped cars.

The 722.3 transmissions handle a lot more torque than the 722.4 varieties.

I have installed a 722.3 transmission in a W124 260e. It wasn't very successful. The 2-3 gear ratios were sluggish in combination with the diff.

The main physical differences between the 722.4 and 722.3.
Torque converter splines are different
The connecting flange between the tailshaft and the transmission on the 722.4 is smaller than the 722.3
The kick-down cable connector on the transmission is physically a different shape.
The oil cooler lines that run off to the radiator are different lengths and different banjo bolt diameter at the transmission end.
The 722.3 is around 3 -4 inches longer than the 722.4
The 722.3 is 50% heavier than the 722.4
The transmission dipstick tube is a different shape - the 722.3 is physically bigger.

For ease of installation you need a 722.409 transmission for the W201 190e 2.6
A 722.4 transmission out of a 4 cylinder W201 190 is a risk.

To install the 722.3 in the 260e I needed to
(a) use the torque converter from the 722.4 in the 722.3
(b) Change the rear tailshaft/flexdisk connecting flange from the 722.4 to the 722.3
(c) cut the kick-down/lockout connector off the 722.4 transmission and splice the 722.3 onto the wiring to suit.
(d) Change the transmission to radiator oil cooling lines.
(e) Adjust the vacuum regulator to set the shift points correctly.
(f) Install the 722.3 dickstick tube

The 722.3 transmission fitted into the W124 260e however it maybe too large to fit on a W201 body.

When you have the transmission out, change the rear main engine seal.

How do I tel what transmission mine has in regards to the exact nubers, i.e, 722.409 or 722.429? Afterreading several of the helpfu replies I think I'd just go with the exact match. Io not wnt to mess around with modifying and cuting things to make it fit, nor reprogramming anything. Also, yes, I have been informed to replace the rear main engin seal while the transmisson is out so I will definitely do that as well. Anything else that can be replaced while I am having the transmission done?

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1990 190E 3.0L

Take a look at the pan rail on the left and right sides. There should be a train of numbers stamped there.

Flex disks.

But. Here's the thing. Sourcing a decent 722.409 will be your hardest task. Because so many of them have gone faulty good second hand units that don't require near seals or K1 or K2 valves are scarce.

I have put three replacement transmissions in the 260e. In frustration at getting a good one I actually installed a 722.3 instead. (As mentioned above this was less than satisfactory.).

If your car is worth it, it maybe of more practicality to have your existing unit rebuilt.

Does the 722.3 physically fit into a 190e 2.6 W201?

I have been told it does not fit, it is too large for the w201 transmission tunnell.