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+--- Forum: Engine / Transmission (https://forums.spaycetech.com/forumdisplay.php?fid=8)
+--- Thread: Polestar TCM Tune Actually Enabled? (/showthread.php?tid=991)
Polestar TCM Tune Actually Enabled? - csecrist13 - 08-21-2025
Hey guys just wanted to put some feelers out there. I bought a 22 xc90 and used orbit to enable the "Transmission Tune". I understand the awd split, engine, etc is all an actual software update. I had the chance to drive a Polestar Optimized xc90 at work that was traded. (Im a JLR tech). Unless I messed something up, orbit does not enable the trans tune. The shift patterns and holding times are completely different. It is notably faster at shifting and is almost a track only kinda tune. Has anyone else had this experience as well or just me?
RE: Polestar TCM Tune Actually Enabled? - leandro.vitali - 08-22-2025
Polestar Optimization may or may not be included in your CEM firmware version. Some users have activated it via Orbit and report good performance results (or a placebo effect). Most report no change in practice (as in my case).
RE: Polestar TCM Tune Actually Enabled? - x119 - 08-22-2025
(08-22-2025, 05:08 PM)leandro.vitali Wrote: Polestar Optimization may or may not be included in your CEM firmware version. Some users have activated it via Orbit and report good performance results (or a placebo effect). Most report no change in practice (as in my case).
Sorry, but these statements are wholly incorrect.
Polestar is a number of things; it’s an engine tune, a transmission configuration and a AWD configuration.
The transmission tune can be enabled on most, if not all vehicles. AWD flash is possible, but requires individual software. The engine tune isn’t available - you can only purchase via dealer.
So, OP, you’ll be getting 1/3 on your vehicle - if it’s set correctly. What did you modify?
RE: Polestar TCM Tune Actually Enabled? - kistigun - 08-23-2025
How do you flash the awd?
RE: Polestar TCM Tune Actually Enabled? - Kuikka123 - 08-23-2025
Is it possible the polestar config alone changes the AWD ratio on a T8? have a 2020 V90 T8 currently on “polestar engineered edition” option. In hybrid mode the power meter/electric power ratio is completely different compared to stock. Accelerating on electric only used to be a challenge, any real electric power was right on the switch point where ICE starts. On the polestar config electric power delivery it’s much more linear and i can easily accelerate without ever starting the ICE by accident. I guess this is “the pedal map” change but on a T8 it seems to be more than just a pedal/power ratio.
RE: Polestar TCM Tune Actually Enabled? - x119 - 08-24-2025
Potentially for the ERAD based vehicles there isn't a flash required, it might simply feed off the CEM configuration.
For the AWD models D/T then you can get a hold of the software file for the DEM and flash it manually - but this isn't something offered by OrBit.
Edit to clarify: OrBit can flash files, that's no issue. It's the procurement of said files
