AF40 TCM Tuning
$250.00
Custom Aisin AF40-6 TCM and E55 ECM Tune Update
Description
Aisin AF40-6 Transmission Custom Tune!
Adds Aisin AF40-6 TCM Reading, Flashing, Datalogging and Custom tuning to your existing Saab 9-3 2.8T Autocal V3 handheld system.
The factory automatic transmission limits the allowed torque to 380 Nm (280 lb-ft) in 1st and 2nd gear and 450 Nm (331 lb-ft) in gears 3-6. Brake torque was also limited to ~ 188 lb-ft which prevents building torque while stationary by pressing the accelerator pedal while the brake is applied. All of these factors severely limited the acceleration performance for the 0-60mph and 1/4 mile times. Raising these limiters now allows for aggressive launches at full power with much quicker 60ft, 0-60mph and 1/4 mile times.
In the past, when we tuned the 2.8T engines on Saab 9-3 Aeros with the automatic transmissions we had to hide how much torque the engine was actually making so that it transmitted a value to the TCM that was below the factory TCM torque limiters. If the TCM sees an engine torque value higher than an allowed torque limit it forces the engine to reduce torque to below the limiter. The TCM can command the ECM to reduce both the throttle angle and the ignition timing to reduce torque below the gear torque and brake torque limits. We can now update both the ECM calibration to reflect the accurate torque it is making while simultaneously optimizing the transmission calibration to provide increased line pressures for improved torque holding capacity and quicker/firmer shifts. This combination will dramatically improve the acceleration performance and reduce transmission slipping and flaring under much higher than stock torque and power levels. I have tested torque levels of over 505 lb-ft shifting at redline without noticeable shift flare (converter slip).
Data logging the AF40-6 after the ECM and TCM custom tune updates are applied will now capture the actual engine torque and power. If you own an eSid3 then this will also show torque and hp accurately on your eSid3 dash displays after the updates are installed.
Download the Aisin AF40-6 Tuning instructions here:
Saab 93 2.8T Aero TAF40A instructions EFILive Autocal v3.pdf
Demo Videos:
Saab 93 AF40 TCM Flashing Demo.MOV
Saab 93 AF40 TCM Read Demo.MOV
Aisin TCM Tune Turbo X (Stage 2+) Launch Demo.MOV
Alex Zaferacopoulos (verified owner) –
This is a MUST if you enjoy sportier driving and want to have a more modern shifting experience. I have had the Vtuner stage 0 for about 14 months before I tuned the AF40 (Automatic 6 speed). Stage 0 alone completely changes the feel of the car and after tuning the transmission it takes it to a whole other level. I finally feel like I have power in 1st and 2nd gear (which were previously boost cut). The shifts feel so much better and also gives the car a firmer feel as if you were driving in manual, it always feels engaged. The only downside I’m noticing is that city driving I’m down about 2 MPG but that is likely because of how much more fun it is in the lower gears. I’d seriously recommend it for anyone looking to modernize the feel of the driving experience.