722.6 5g oil change , small particles in oil

[Wighty]

Here's a question what's the difference between 236.14 and 236.13 both are red?
According to https://bevo.mercedes-benz.com/bevolisten/231.1_en.html
.14 is for the 722.6 gearbox and .13 is for the xfr case in the 4matic is my reading of this correct?

No idea buddy . But if it is for the transfer case , then it's not for the auto box .

 

[DREAMER NO2]

Before i do any oil change i do one thing before i tip any oil in to my engine or auto box .Pick up a sieve and put all you new oil through it first .Reason i do this is on every bottle of oil i have used over the past 10 years will have this tin foil seal over the bottle opening .And to get the oil out first you have to puncture this tin foil . Nothing saying that bits of this tin foil will never end up or enter your rocker box .Worth thinking about this .

 

[thebiglad]

If you're going to do a complete flush of the TC, cooler and lines you can get a kit with the sump gasket, bolts, washer, filter, pilot bushing (electric connector) and even the little red locking tab for the "dip stick" hole bung. it's at least worth getting this filter and gasket. https://www.auto-doc.fr/febi-bilstein/1886347
In France I've found Oscaro, Web deal Auto very good as well, price and delivery wise.
Buy soon before the £ reaches 90p to the €!!!!!!

Thanks for that Oldspanners. I've used Oscaro.com quite a lot for various vehicles, but couldn't find any of the correct atf at either place.

I'm thinking that I might buy a few litres of atf Dexron 111 as a flush/wash-out oil. So I empty out the old oil - maybe 3.5 ltrs which I think will be minging, fill up with Dexron 111 - tick over for 5-10 mins, then empty out - do again with the cheap stuff and empty out - then refill with good quality up to spec fluid. Using this approach I hope to be able to get to a stage where the 'box/cooler/TC are all washed out and replaced with good quality clean oil.

 

[Wighty]

Thanks for that Oldspanners. I've used Oscaro.com quite a lot for various vehicles, but couldn't find any of the correct atf at either place.

I'm thinking that I might buy a few litres of atf Dexron 111 as a flush/wash-out oil. So I empty out the old oil - maybe 3.5 ltrs which I think will be minging, fill up with Dexron 111 - tick over for 5-10 mins, then empty out - do again with the cheap stuff and empty out - then refill with good quality up to spec fluid. Using this approach I hope to be able to get to a stage where the 'box/cooler/TC are all washed out and replaced with good quality clean oil.

But then you will have to do the same again to get the Dexron out ?

 

[thebiglad]

But then you will have to do the same again to get the Dexron out ?

Hi Wighty, since reading your comment I've been thinking it through.

I really want to get rid of whatever is in there (who knows??) because it looks horrible almost black and only shows any red on the kitchen towel I used to wipe the stick. (so whatever I put in I'm sure will be an improvement ), and end up with a full circuit of good spec oil.

If I could find someone halfway nearby to do a full power flush that's what I would do.

Just found this Youtube vid and this is how I will do mine :

The good stuff starts at about 19 mins.

 

[Wighty]

Hi Wighty, since reading your comment I've been thinking it through.

I really want to get rid of whatever is in there (who knows??) because it looks horrible almost black and only shows any red on the kitchen towel I used to wipe the stick. (so whatever I put in I'm sure will be an improvement ), and end up with a full circuit of good spec oil.

If I could find someone halfway nearby to do a full power flush that's what I would do.

Just found this Youtube vid and this is how I will do mine :

The good stuff starts at about 19 mins.

I've watched them all over the last couple of years , before I did my 5g and 7g . Jim2 did a very good write up last year . There is also some good stuff in the forum diy section on the 5g ATF change .
When you said you had some odd gearbox problems don't spend too much in case you need the sump off again for some other repair ?
Maybe an 80% change is good enough to start with ? If that fixes the shifting problem then just drop the sump 3L out again and voila you are at 100% ish ?

 

[malcolm E53 AMG]

Interesting thread, as a point I would only fit genuine parts some aftermarket filters aren’t up to the job. This probably isn’t the case here but worth mentioning.

 

[Oldspanners]

Hi Wighty, since reading your comment I've been thinking it through.

I really want to get rid of whatever is in there (who knows??) because it looks horrible almost black and only shows any red on the kitchen towel I used to wipe the stick. (so whatever I put in I'm sure will be an improvement ), and end up with a full circuit of good spec oil.

If I could find someone halfway nearby to do a full power flush that's what I would do.

Just found this Youtube vid and this is how I will do mine :

The good stuff starts at about 19 mins.

As Wighty says Jim2 did an excellent write up complete with pictures and I would recommend this way as once you're below the car and getting all oily you won't have to repeat the process.
In the end it will be no more expensive and you'll know it's completely changed.

 

[Wighty]

Just spent a couple of hours sweating in the heat under the car . Front wheels on wheel ramps (drive is sloped so it sort of makes the gearbox level ) .
I had bought a Febi filter and sump gasket kit for £10 ish recently , I was going to save it for a while but there wasn’t much wind today so I thought better in the car than in the garage . I have 8L of Fuchs 236.14 on the shelf as well .
Last ATF and filter change was @79k and 3 years ago ….now on 97k . I actually change the sump ATF yearly with a Pela pump anyway so this wasn’t too excessive for me . I did change the gearbox electrical connection last year so actually missed my normal ATF change anyway .
Much easier than the 7g to change and I’d done it a couple or so times before ,so no stress involved .

The sump shot was with magnets removed and before I cleaned it . No metal horrors were spotted .
I will check the level after a run in a couple of days l I just replaced what I took out , which was 3L

 

[ajlsl600]

Panic is over buddy . I had the w & t as wear and tear , the d and p had me stumped

D. Don't P. Panic.

 

[ajlsl600]

A black dust like residue in trans oil or bottom of sump is normal and comes from friction discs in trans clutch packs . Larger bits ain't. And when not changed at reccomended intervals the residue can get past solenoid valve filters and cause other issues.
The engineered (for end users) headache involved in changing benz trans oils on modern benz really pss me off.pumping oil up thru tube in drain! Nutss There was nothin wrong with dipstick, drain plug and hot, cold level on stick system is simply engineered to push us into dealers . I simply can't see any other reason.
Assuming no leaks, drain it at operating temp catch all measure it. Put back what came out. If I had cause to remove tranny I would find a way to tap an access able inlet and do just that dumping the f tube in sump then maybe dropping half oil a week later to allow something of a TC oil change as well. Mine is due change soon. Right now that's a real ballache for me, car weighs 2 tonne and for next Yr n half I not likely to have replaced my car lift.

 

[rich.g.williams]

Just spent a couple of hours sweating in the heat under the car . Front wheels on wheel ramps (drive is sloped so it sort of makes the gearbox level ) .
I had bought a Febi filter and sump gasket kit for £10 ish recently , I was going to save it for a while but there wasn’t much wind today so I thought better in the car than in the garage . I have 8L of Fuchs 236.14 on the shelf as well .
Last ATF and filter change was @79k and 3 years ago ….now on 97k . I actually change the sump ATF yearly with a Pela pump anyway so this wasn’t too excessive for me . I did change the gearbox electrical connection last year so actually missed my normal ATF change anyway .
Much easier than the 7g to change and I’d done it a couple or so times before ,so no stress involved .
View attachment 84507 View attachment 84508
The sump shot was with magnets removed and before I cleaned it . No metal horrors were spotted .
I will check the level after a run in a couple of days l I just replaced what I took out , which was 3L

That looks very clean - just small inevitable amount of dust from friction material. Good idea to change ATF often.

 

[rich.g.williams]

There's a simple way to work out how clean ATF in your transmission is. The formula is:-

{full/(full-drain1)} x {full/(full-drain2)} x {full/(full-drain3)} = df where df is the dilution factor


Some examples,

let's say one ATF change that drained 4L

so {8/(8-4)} df is 2 that's saying 1 part old ATF to 1 part new ATF that's same as saying 50% of ATF is still the old stuff.

let's say two ATF changes first change drained 4L second change drained 4L

so {8/(8-4)} x {8/(8-4)} so df is 4 that's saying 1 part old ATF to 3 parts new ATF that's same as saying 33.3% of ATF is still the old stuff.

let's say two ATF changes first change drained 7L second change drained 4L

so {8/(8-7)} x {8/(8-4)} so df is 16 that's saying 1 part old ATF to 15 parts new ATF that's same as saying 6.67% of ATF is the old stuff.

let's say three ATF changes first change drained 4L second change drained 4L third change drained 4L

so {8/(8-4)} x {8/(8-4)} x {8/(8-4)} so df is 16 again that's saying 1 part old ATF to 15 parts new ATF so 6.67% of ATF is the old stuff.

let's say four ATF changes first change drained 4L second change drained 4L third change drained 4L fourth change drained 4L

so {8/(8-4)} x {8/(8-4)} x {8/(8-4)} x {8/(8-4)} so df is 32 that's saying 1 part old ATF to 31 parts new ATF so 3.2% of ATF is the old stuff.

-

 

[Wighty]

There's a simple way to work out how clean ATF in your transmission is. The formula is:-

{full/(full-drain1)} x {full/(full-drain2)} x {full/(full-drain3)} = df where df is the dilution factor


Some examples,

let's say one ATF change that drained 4L

so {8/(8-4)} df is 2 that's saying 1 part old ATF to 1 part new ATF that's same as saying 50% of ATF is still the old stuff.

let's say two ATF changes first change drained 4L second change drained 4L

so {8/(8-4)} x {8/(8-4)} so df is 4 that's saying 1 part old ATF to 3 parts new ATF that's same as saying 33.3% of ATF is still the old stuff.

let's say two ATF changes first change drained 7L second change drained 4L

so {8/(8-7)} x {8/(8-4)} so df is 16 that's saying 1 part old ATF to 15 parts new ATF that's same as saying 6.67% of ATF is the old stuff.

let's say three ATF changes first change drained 4L second change drained 4L third change drained 4L

so {8/(8-4)} x {8/(8-4)} x {8/(8-4)} so df is 16 again that's saying 1 part old ATF to 15 parts new ATF so 6.67% of ATF is the old stuff.

let's say four ATF changes first change drained 4L second change drained 4L third change drained 4L fourth change drained 4L

so {8/(8-4)} x {8/(8-4)} x {8/(8-4)} x {8/(8-4)} so df is 32 that's saying 1 part old ATF to 31 parts new ATF so 3.2% of ATF is the old stuff.

-

Im not sure you realise how simple I actually am .

 

[V6Matty]

Im not sure you realise how simple I actually am .

Just keep to the Wighty schedule and you’ll be fine

 

[rich.g.williams]

When I was reassembling the 722.6 I changed the ATF in the Torque Converter by filling it right up and emptying as much as possible out, did that three times. Pure guesswork but let's say only 250mL of old ATF was left in the Torque Converter, so working out my df as follows:-

using {full/(full-drain_1)} x {full/(full-drain_2)} x ...............{full/(full-drain_n)} = df

{8/(8-7.75)} so df is 32 that's saying 1 part old ATF to 31 parts new ATF that's same as saying 3.23% of ATF is the old stuff.

If I didn't know it already the formula highlights the importance of getting as much of the old ATF out as possible for each ATF change.

 

[Wighty]

Measured the level after a 20 minute drive , added 0.5L . Good to go for another year .
I‘be now got the E class 7g box to do

 

[Wighty]

I’m beginning to suspect mental issues
CLK ATF history
35k MB gearbox service
40k ATF sump change , me
56k Sump+ filter ,me
62k ATF sump change ,me
73k “
79k Sump+ filter ,me
86k ATF sump change ,me + electrical connector
92k. “
97k Sump+ filter me
I think that covers it !

 

[rich.g.williams]

I’m beginning to suspect mental issues
CLK ATF history
35k MB gearbox service
40k ATF sump change , me
56k Sump+ filter ,me
62k ATF sump change ,me
73k “
79k Sump+ filter ,me
86k ATF sump change ,me + electrical connector
92k. “
97k Sump+ filter me
I think that covers it !

Hmm, I think I could extend my formula so that it produced a graph of ATF age versus time (or mileage).

Another take home from the formula is how much new or recently new ATF gets thrown away with every ATF change lol