C55 change TCU
I would like the changes to happen faster with the paddle.
I am watching this https://www.weistec.com/722-6-tcu-upgrade.html
Thank




In any case, do you notice faster/smoother/harsher shifting in normal auto and paddle shifting? Are shift points raised? Would appreciate your feedback. There's not much out there as far as real world experience with the Vtech TCU.
https://www.weistec.com/722-6-tcu-upgrade.html
I have not decided yet when to buy, but I want the changes to pass faster, Vtech is much cheaper




In any case, do you notice faster/smoother/harsher shifting in normal auto and paddle shifting? Are shift points raised? Would appreciate your feedback. There's not much out there as far as real world experience with the Vtech TCU.
I’ve been running the Vtech TCU for a couple months now. Shifts are more aggressive with driving normally and can be jerky at times. If using the paddle shifters, it lets you use up until 7k rpms (I’d shift earlier personally and so you can avoid the car bogging). Downshifts are also pretty aggressive (DTK is more aggressive though).
With the DTK TCU (I haven’t ran it in a couple months so this is off of my memory) I don’t recall noticing any harshness when driving normally. It doesn’t give you more RPMS and isn’t too much faster than stock. It was very aggressive downshifts and whenever I was on backroads I loved it personally.
Summary: I’d say the DTK is for the person who daily drives their C55 and wants the occasional fun. If you’re serious about going fast though, go with the Vtech TCU. It’s still very fun but I’d say the DTK one was slightly more fun. This is just my personal opinion though.
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I’ve been running the Vtech TCU for a couple months now. Shifts are more aggressive with driving normally and can be jerky at times. If using the paddle shifters, it lets you use up until 7k rpms (I’d shift earlier personally and so you can avoid the car bogging). Downshifts are also pretty aggressive (DTK is more aggressive though).
With the DTK TCU (I haven’t ran it in a couple months so this is off of my memory) I don’t recall noticing any harshness when driving normally. It doesn’t give you more RPMS and isn’t too much faster than stock. It was very aggressive downshifts and whenever I was on backroads I loved it personally.
Summary: I’d say the DTK is for the person who daily drives their C55 and wants the occasional fun. If you’re serious about going fast though, go with the Vtech TCU. It’s still very fun but I’d say the DTK one was slightly more fun. This is just my personal opinion though.
Also, on FB DTK states they only work on cars with the 55k motor, yet they provided you with a TCU for your C55?
Last edited by brauhaus313; May 30, 2021 at 03:08 PM.








Also, on FB DTK states they only work on cars with the 55k motor, yet they provided you with a TCU for your C55?
DTK doesn't publicly list that they make a C55 TCU, but if you ask them they do. At the end of the day we all share the 722.6 transmission.
I just want the changes to happen faster




A question, is it plug and play or is it necessary to record the VIN?
Last edited by pttk; May 30, 2021 at 09:27 PM.




TCU install is also quite easy. Firstly, remove the front passenger floor mat. Then pull back the carpeting and you'll see a foam movable piece along with a silver piece that is bolted in. Simply unbolt the four bolts that hold it in (can be a little hard to do but shouldn't take more than 5 minutes). If you push it back you'll see the TCU.
TCU install is also quite easy. Firstly, remove the front passenger floor mat. Then pull back the carpeting and you'll see a foam movable piece along with a silver piece that is bolted in. Simply unbolt the four bolts that hold it in (can be a little hard to do but shouldn't take more than 5 minutes). If you push it back you'll see the TCU.
Thank




