# Gearbox torque reduction

**URL:** <https://community.ecumaster.com/t/gearbox-torque-reduction/3893>\
**Category:** EMU PRO\
**Created:** [June 19, 2025, 12:32am UTC](https://community.ecumaster.com/t/gearbox-torque-reduction/3893 "2025-06-19T00:32:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ScottSmith](https://avatars.discourse-cdn.com/v4/letter/s/cc9497/32.png) [@ScottSmith](https://community.ecumaster.com/u/ScottSmith)\
**Post date:** [June 19, 2025, 12:32am UTC](https://community.ecumaster.com/t/gearbox-torque-reduction/3893/1 "2025-06-19T00:32:26Z")

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I’m looking to implement flat upshifts and rev matched downshifts on an H-pattern manual for closed circuit racing. I have DBW on a naturally aspirated port injected 6 cyl.

1. Under Drivetrain/Gearbox/Torque Reduction, I see tables for Ignition Correction, Cylinders Cut, and DBW target correction. Two of the tables use “Gearbox Torque Reduction %” while the third table uses “Gearbox Torque Reduction Requested Value %.” What’s the difference?
2. Under Drivetrain/Gearbox/Gear Shift/Downshift/Activation, there’s a table for “Max RPM.” Can I set that very high (10k) and trust that it won’t work unless the next gear is below my revlimiter? Or do I need to do the math to ensure each downshift is possible?
3. Under Drivetrain/Gearbox/Gear Shift/Downshift/RPM Matching, why is there so much to set up? Can’t it just operate like another RPM limiter but using the math for next gear ratio & wheel speed? Or, do you have guidance on how to configure ignition correction and cylinder cut?

Thanks!