[81bear]

Originally Posted by m3atyg80x

I also ended up flashing the trans tune back to stock. The aggressive downshifts were enough to make me reconsider going back. Over time I assume wouldn’t be good for the tranny with how much it jerks the car forward

I must say I don’t have any issues with downshifting. In my car it’s smooth and not unsettling at all. I couldn’t remember what the stock programming was like so I checked some YouTube G80 reviews. From what I can see they are identical to the CS tune with the downshifts speed a bit slower in stock form. I do notice in D3 with hard braking the CS tune drops an extra gear and holds it there far longer than the stock tune, hence why most people daily on D2 not D3.

It’s unfortunate you haven’t had the same experience I’ve had with the tune as I think this is one of the best bang for the buck mods available.

[SaMaster14]

For those interested, here’s a video of how the car sounds - stock - with the CS transmission coding! Downshifts are a *real* difference

https://youtu.be/sHZlfcT3T60?si=lLfW0kmcnJb-duOK

[m3atyg80x]

Originally Posted by 81bear

I must say I don’t have any issues with downshifting. In my car it’s smooth and not unsettling at all. I couldn’t remember what the stock programming was like so I checked some YouTube G80 reviews. From what I can see they are identical to the CS tune with the downshifts speed a bit slower in stock form. I do notice in D3 with hard braking the CS tune drops an extra gear and holds it there far longer than the stock tune, hence why most people daily on D2 not D3.

It’s unfortunate you haven’t had the same experience I’ve had with the tune as I think this is one of the best bang for the buck mods available.

I had the opposite experience, and I'm not sure if the tune was fine-tuned to allow blips on throttle, but hard braking or downshifting resulted in a straight clutch dump. I was more concerned about the d3 downshifts coming to a halt because the tranny appeared to be uncertain what to do.

I did notice that xHP users have the ability to change a variety of transmission settings, including throttle blips, so that could be an option in the future.

[81bear]

Originally Posted by SaMaster14

For those interested, here’s a video of how the car sounds - stock - with the CS transmission coding! Downshifts are a *real* difference

https://youtu.be/sHZlfcT3T60?si=lLfW0kmcnJb-duOK

This is very similar to how mine behaves. Nice crisp downshifts.

By the way is the audio captured through the GoPro or are you using an external mic? I was meaning to get some exhaust clips. All I have is a pair of headphones attached to an iPhone in the trunk and the audio keeps clipping and you can’t hear sh!t. Lol!

[SaMaster14]

Originally Posted by 81bear

This is very similar to how mine behaves. Nice crisp downshifts.

By the way is the audio captured through the GoPro or are you using an external mic? I was meaning to get some exhaust clips. All I have is a pair of headphones attached to an iPhone in the trunk and the audio keeps clipping and you can’t hear sh!t. Lol!

Just the go pro! The way I positioned it, it’s able to pick up the exhaust sound with minimal wind noise, but still not the best sound vs an actual mic.

[m3atyg80x]

Originally Posted by SaMaster14

For those interested, here’s a video of how the car sounds - stock - with the CS transmission coding! Downshifts are a *real* difference

https://youtu.be/sHZlfcT3T60?si=lLfW0kmcnJb-duOK

I'm jelly. That looks buttery smooth!

[Rodizzle]

I wonder if there are differences in these TCU codeboxes. I imagine there are, which might explain why some of us experience clutch dumps, like I do. What I’ve observed is that in manual mode, on any setting, downshifting works as it should from 4th to 3rd gear. Beyond that, I just let it downshift on its own, and I experience ZERO jerks. It’s smooth as butter.

Also, I wonder if a reflash would help. I wouldn’t mind paying again for a reflash to see if it would address the issue. XHP seems to have their share of problems as well, so it’s a mix of good and bad. It’s interesting that no company has produced an actual TCU tune. Correct me if I’m wrong, but isn’t the TCU from BMW unlocked, allowing tuners to create a genuine transmission tune?


Maybe kubax86 could inform us if there are different versions of codeboxes. I would imagine so since the outcome isn’t identical for everyone.


-Ro

[Needsdecaf]

Originally Posted by Rodizzle

I wonder if there are differences in these TCU codeboxes. I imagine there are, which might explain why some of us experience clutch dumps, like I do. What I’ve observed is that in manual mode, on any setting, downshifting works as it should from 4th to 3rd gear. Beyond that, I just let it downshift on its own, and I experience ZERO jerks. It’s smooth as butter.

Also, I wonder if a reflash would help. I wouldn’t mind paying again for a reflash to see if it would address the issue. XHP seems to have their share of problems as well, so it’s a mix of good and bad. It’s interesting that no company has produced an actual TCU tune. Correct me if I’m wrong, but isn’t the TCU from BMW unlocked, allowing tuners to create a genuine transmission tune?


Maybe kubax86 could inform us if there are different versions of codeboxes. I would imagine so since the outcome isn’t identical for everyone.


-Ro

XHP isn't a TCU tune?

[chris3g]

Originally Posted by Rodizzle

I wonder if there are differences in these TCU codeboxes. I imagine there are, which might explain why some of us experience clutch dumps, like I do. What I’ve observed is that in manual mode, on any setting, downshifting works as it should from 4th to 3rd gear. Beyond that, I just let it downshift on its own, and I experience ZERO jerks. It’s smooth as butter.

Also, I wonder if a reflash would help. I wouldn’t mind paying again for a reflash to see if it would address the issue. XHP seems to have their share of problems as well, so it’s a mix of good and bad. It’s interesting that no company has produced an actual TCU tune. Correct me if I’m wrong, but isn’t the TCU from BMW unlocked, allowing tuners to create a genuine transmission tune?


Maybe kubax86 could inform us if there are different versions of codeboxes. I would imagine so since the outcome isn’t identical for everyone.


-Ro

not sure what you mean, XHP is an actual TCU tune. In addition to the OTS tunes they will also make you a custom tune if you pay them.

[Rodizzle]

Originally Posted by chris3g

not sure what you mean, XHP is an actual TCU tune. In addition to the OTS tunes they will also make you a custom tune if you pay them.

I understood now; XHP appears to offer user-configurable tunes. I wasn’t previously aware they provided custom tunes. If they do, then why isn’t everyone opting for that? From the ratings I’ve seen on their threads, there still seem to be issues.

[kubax86]

Originally Posted by Rodizzle

I wonder if there are differences in these TCU codeboxes. I imagine there are, which might explain why some of us experience clutch dumps, like I do. What I’ve observed is that in manual mode, on any setting, downshifting works as it should from 4th to 3rd gear. Beyond that, I just let it downshift on its own, and I experience ZERO jerks. It’s smooth as butter.

Also, I wonder if a reflash would help. I wouldn’t mind paying again for a reflash to see if it would address the issue. XHP seems to have their share of problems as well, so it’s a mix of good and bad. It’s interesting that no company has produced an actual TCU tune. Correct me if I’m wrong, but isn’t the TCU from BMW unlocked, allowing tuners to create a genuine transmission tune?


Maybe kubax86 could inform us if there are different versions of codeboxes. I would imagine so since the outcome isn’t identical for everyone.


-Ro

There are only 2 tunes - CS and CSL.
CS is for all xDrive cars (G80/G81/G82/G83)
CSL is for all RWD cars (G80/G81/G82/G83)

You can't put CS for RWD cars since CS is intended to work with xDrive only.

there is no difference between models (G8x)

[Rodizzle]

Originally Posted by kubax86

There are only 2 tunes - CS and CSL.
CS is for all xDrive cars (G80/G81/G82/G83)
CSL is for all RWD cars (G80/G81/G82/G83)

You can't put CS for RWD cars since CS is intended to work with xDrive only.

there is no difference between models (G8x)

Thank you for the info.

[chris3g]

Originally Posted by Rodizzle

I understood now; XHP appears to offer user-configurable tunes. I wasn’t previously aware they provided custom tunes. If they do, then why isn’t everyone opting for that? From the ratings I’ve seen on their threads, there still seem to be issues.

XHP offers off-the-shelf maps in 3 stages along with a customization module which you can use to modify some of the map parameters yourself (via an app).

I guess that most people do not want to pay ~ $600 for xhp and then another $600 for a custom map when the value of custom mapping the TCU has not really been established. People who want to go as fast as possible are happy with xhp stage3, i use if myself and don't have any complaints about it. If you want faster than stock but without any harsh or jerky shifts you can use stage 2.

[Team Tonka]

Might be nice to have these options when doing a transmission tune (at least for xDrive) - is something like that possible?

D1/S1 = CS Transmission Tune (but in the CS D2/D3 configuration)
D2/S2= OEM Transmission Tune (but in the OEM D3/S3 configuration)
D3/S3 = CS Transmission Tune (in the CS D3/S3 configuration)

[TopJimmy]

Originally Posted by Team Tonka

Might be nice to have these options when doing a transmission tune (at least for xDrive) - is something like that possible?

D1/S1 = CS Transmission Tune (but in the CS D2/D3 configuration)
D2/S2= OEM Transmission Tune (but in the OEM D3/S3 configuration)
D3/S3 = CS Transmission Tune (in the CS D3/S3 configuration)

Sorry, the TCU (trans) flash isn’t “slots” like programming the M1/M2 buttons, so we can’t have different tunes per slot. D1/D2/D3 are more like levels of aggression using the same “shift logic”, if that makes sense.

Perhaps if you worked directly with XHP on a custom trans tune you might get close to what you ask for.

[beachBmmr]

Originally Posted by Rodizzle

I just don’t drive it in S3; it’s too damn harsh. Like you said, the “jerky jerk” isn’t good at all for the mounts or transmission. It’s snappy as hell, whether upshifting or downshifting on throttle. Anything under 40% throttle is just harsh.
I’ve been lurking in this thread and others to see if anyone else has had the same issue. You’re the first who seems to have come out into the open. I know we’re not the only ones experiencing this. It’s now at a point where it’s pretty much debatable, but I want to go back to stock and consult the other guy who flashes these files to see if there are any differences.
I noticed this right away and described it in my review (though not to this extent).

I don’t experience any of these symptoms.

https://youtu.be/UYUz9_ywrt0?si=9_qbDVerqOUPmIBR

[Needsdecaf]

Originally Posted by beachBmmr

I don’t experience any of these symptoms.

https://youtu.be/UYUz9_ywrt0?si=9_qbDVerqOUPmIBR

Thanks for posting.

I took one look at your video and said....Texas. LOL. It's so easy to recognize having lived here over a decade.

[beachBmmr]

Originally Posted by Needsdecaf

Thanks for posting.

I took one look at your video and said....Texas. LOL. It's so easy to recognize having lived here over a decade.

Especially traffic moving at 85 at all times

[Team Tonka]

Does it bother anyone else in D3 and Engine in Sport + how long it holds the RPMs at a real high RPM for what I'd consider quite a long time when I'd argue it could shift up sooner?

[TopJimmy]

Originally Posted by Team Tonka

Does it bother anyone else in D3 and Engine in Sport + how long it holds the RPMs at a real high RPM for what I'd consider quite a long time when I'd argue it could shift up sooner?

I notice it, but level 3 is meant to hold RPMs in the powerband for instant performance.

Imagine being on track and an opportunity pops open for a split second. I want that shot.

[Needsdecaf]

Originally Posted by Team Tonka

Does it bother anyone else in D3 and Engine in Sport + how long it holds the RPMs at a real high RPM for what I'd consider quite a long time when I'd argue it could shift up sooner?

No, see below.

Originally Posted by TopJimmy

I notice it, but level 3 is meant to hold RPMs in the powerband for instant performance.

Imagine being on track and an opportunity pops open for a split second. I want that shot.

Exactly. That's what D3 is for. If you think this car is bad (and I don't have THAT much seat time) you should drive a Porsche PDK in Sport Plus. LOL. That mofo downshifts and puts you about 1,000 RPM from the redline. And it will NOT upshift unless you basically hit the limiter. Basically it's meant for extreme driving / track use where you don't want to shift it yourself. It's designed to shift like you would if you were tracking and shifting via the paddles.

I am pretty sure that in most if not all of Porsche's Nurburgring record attempts, they let PDK shift itself.

[christianb5s4]

Originally Posted by beachBmmr

I don’t experience any of these symptoms.

https://youtu.be/UYUz9_ywrt0?si=9_qbDVerqOUPmIBR

That's a great video, probably one of the best in showing real world changes the CS flash brings. Thank you!