Recently did a transmission fluid and filter change. Followed spec, filled to overfill then got the dripping and sealed it, how its explained in the tech docs.

What is happening is that normal driving in S+ or C is fine. No issues what so ever. However, once i put heavy load on it (80% or full WOT from a stop, 1st rolling, or 2nd rolling) it almost as if it doesn't grab the gear. I hit rev limiter and it then grabs OR it hits revs and then the whole car shakes for a moment then it grabs and goes. Hard from 3 to 4 is completely fine, had to find a long enough empty road to test it - but it works.

Trying to see if this is something that will work its way out or if its something that requires attention right away.

I did do the readapt (car on, not started, lights on dash, gas pedal down to kick down for 10s, turn car off, release, wait 2 min) and it didn't seem to help. Ill also say 1/5 times i go from 2nd to 3rd hard, it does grab the gear correctly and work..


2014 E63s Wagon 4Matic 95k miles.

 

https://www.fcpeuro.com/products/mer...-moly-7229late

Kit used.

 

https://mbworld.org/forums/e-class-w...tf-change.html

may need manual adaptation


was there lots of metal debris on metal plate?

Possible you didn't drain all fluid before adding new fluid? Too much fluid can do this at times

 

So update


Did adapt for the 5th time, now 3rd no longer shudders, but it also doesn't kick hard, it's a smooth grab and change....so...going to keep an eye on it...not sure if fluids high or low but if there is an issue I'm thinking it's fill related....

 

There's a line pressure issue ... it may work itself out in 200 miles

 

You may not like this answer, but I had shift flare issues after a service using that FCP kit with the Top Tec fluid. That is not MB approved despite Top Tec saying it will work, I ignored another review stating the same thing and figured the guy hadn't set the level correctly.

Knowing that I did, I bought the other kit with the Pentosin 134 FE fluid that IS approved and it got rid of the flare. FCP will credit it but I have to send all my old fluid back which is just a pain in the rear....

I highly recommend avoiding this fluid, apparently our transmissions are quite picky!

 

Yeah.... ****. Im slipping into 2nd on a hard acceleration....guess she's getting drained again.

 

OEM fluid is a must and filter please. Also, sometimes, some miles after a fluid change or adaption change, will help work things out.

 

Well, intent is to always use oem or equivalent, however trusted off both FCP Euro & LiquiMoly site...both said this is what's needed for our transmissions...the top tech atf.

 

Posting now because i failed to update, and i got here based on a google search and i don't want to be this comic:




I drove it another week. No change kept slipping and hard - even on not super enthusiastic acceleration. I swapped the kit out for this - https://www.fcpeuro.com/.../mercedes-722-9-transmission... and the issue was solved. It was still a smig sketchy for about a day, but only REALLY hard acceleration caused it (RS) - however that cleared up in about a week.

 

nice! I added this to the sticky thanks for completing the story

 

Thanks for the update. Glad it is resolved for you.

 

Thank you for sharing. I am going through this exact same thing at the moment. Had a fender bender and the car was down for a few months. The trans cooler was shot so I had them top off the trans fluid. As soon as I got it back it wouldn't even go WOT. Felt like the trans would pop out of gear and then pop back in. Slipping or complete throttle cut. Regardless, I drained it and filled it with the only 236.15 fluid I could find locally. (I was impatient) and now, I think I'll have to do this all over again. What a PITA but thank you for the post.