Originally Posted by NoVAe63s

Sounds like throttle closure. Any way to datalog ie HPT?

I'd be bummed too, but from what I've seen the track record for EC is usually they come through to make it right.

Originally Posted by C2 Turbo

Hope you get it resolve soon but didn't you know about this issue going in, I thought you did, no?

Originally Posted by kenneyd

I did not.
I read through just about every post here with eurocharged in the title, both the post I referenced above flew under my radar since they didn't have it in the title.

Originally Posted by wolves.creed

The initial problem with the hard shift is 90% the tune, 10% the bushings of the rear diff. I'm probably the only one who has gone through so many tunes from different companies. I have had 7-8 different tunes, Weistec Morendi Gad motors and so on. Its simple stuff, i have two ecus, one with stock 585hp flash and no cat delete euro 2 ticked (so i don't get check engine light for my decat exhaust) and the second one st2 where i took all the good bits from different tunes and made it into one perfect tune. You guys must understand that every tune will be different and will have its benefits and bad sides, there are so many things to consider when you flash your car. for example there is a bug in weistec tune where you radiator fan works in one speed and your oil temps rise hard over 125c. Until i pointed it out they didn't even know about it, it happens when you flash your car and during that flashing process it will make the radiator fan stick to one speed no matter how hard you drive your car, the only solution is to reflash it again. My car has 18000 miles on it, its almost brand new, and my last tune was from Gad Motors where they offered me to do the engine tune and tcu tune. I know my car really well i know every jitter and push it does in gear change and every sound it makes, after the flash started experiencing hard shifts from 2-3 and i am 100% sure if i drove the car more like this it would brake something. Told the guys and got the same answer as the TS, must be your gearbox is dying (my car has 18000 miles on it). I just got my money back and put my stock ecu on and the problem went away. So if you didn't have these problems before the tune, just flash back to stock and see if the problem goes away, if it does get your money back and find someone who will get you a perfect tune. I mean we are talking about a cars that are 7 years old now and people could give away their tunes for free, i did ))) I have a amg crew WhatsApp group and i just gave my tune for free to 14 people there, they only paid to flash it to their cars. I mean tuners are not interested in these cars anymore and the cost of the tune is so low in my country that you might as well get it for free. If you guys need it, i will send it to you without any problems. All you need to do is find someone who will flash it, usually it costs about 150-200$. Hope you get your problem sorted.

Originally Posted by baldmike73

sounds like you need to upgrade and buy a TCU tune - my car and others that are tuned have all had the same issue essentially its the TCU retarding the amount of power being sent to the trans essentially keeping it from failure - i am not articulating it well, but its too much power and the TCU is holding it back - but my car 2014 does the same in S+ 2nd to 3rd is hard - look for the thread about the TCU tune - its long, but really helfpul.

Originally Posted by Mojo20032004

"Star tool, re-adaptation of wet-clutch system then drive the car in S not S+ for 100 miles or so to allow for the driver self learning feature. Put back in S+ and problem should go away"

This the answer I got from a friend who owns a shop that sells ecu and tcu tunes for our cars.

Originally Posted by thesaintusa

Hope you sort it out.

Data logging would show what is going on when you feel that hard shift, i.e. throttle body position, boost etc.

Originally Posted by 5soko

Sorry to hear!
As your trans was just updated I don't find that to be a solution, it seems like its a Tuning issue or tq reporting issue on the tuners end that needs some fine tuning.
I am on original 2014 ECU and TCU software and all is fine for me with my tune from another company, not to start a tuner vs tuner thread, but just giving a example.

I know personally some peoples car has been cured from this with TCU tuning from EDOK, BUT it should absolutely should work crisp and perfect just like factory without a TCU tune even with stock TQ limiters in place.

May be a specific ECU or TCU version that the tune isnt playing nice with possibly?

Originally Posted by kenneyd

I'm going to try data logging tomorrow and biting the throttle position


​​​​​​
I mentioned earlier that my TCU was updated. That was based on an entry into on my cars VMI stating that.
When I talked to Jerry today, he said the version I have is still from 2014. And there are newer ones. But he also said that, that is not the issue.

Originally Posted by brutus_tx

I know this deviates from the general consensus in this thread, but have you ruled out engine mount issues?
Take five minutes to rule that out before going down too many rabbit holes.. and yes, go to MB and get the latest updates for your transmission as well.

If you are having issues with a particular tune that no one else is, then that tells me there may be a mechanical issue behind it. I'm not ruling out software by the way, just suggesting look to mechanical issues first.

Originally Posted by kenneyd

My motor mounts are fine.
Like mentioned before, the car has 11k mile from a 82-yr old PO, I bought it and everything worked perfect. I flash STG1 on there and everything is perfect except S+ 2-3 shift. Flash back to stock and the problem goes away. If it was the motor mounts, it still be there.
Jerry sent a couple test tune with stock Tq management vs modified it may have changed the severity of the 2-3 shift.
Remember, Im not talking about a overly hard or firm shift, im saying the shift has a brief deceleration in if that causes a very uncomfortable jolt. Perhaps this is what is breaking peoples mounts??
And as we have found out, many people have reported this, not just me.

Anyway EC came back today saying it was likely the outdated version of the TCU software 0009021222. Apparently they think it might not be able to relearn shift adaption, and the suggestion was made to go to the dealer do have them perform a shift adaption. I have a xentry, so I then reset all the adaption learning, and then ran the upshift 2-3 adaption specifically. This was this afternoon, I drove it for about 10 miles after this, but the traffic was bad and and it wasn't going to be safe testing the 2-3. I got maybe 2 or 3 tries and I wanna say is felt slightly better, but no where near what it felt like with a stock tune.
I planned on driving it for 100+ miles over a few days before declaring a verdict

BUT, just now i was able to use my xentry/vediamo to flash to 0009028526, which not the newest, but it is exactly was jerry recommended. I will test this tomorrow and report back.