[SRTengineers]

Originally Posted by HEMEEE

Posted for ResumeSpeed:


A.) The 1-2 shift hesitation TSB has still not been released, can you give us the latest time frame on when we might see it?

B.) Will the TSB apply to both the LX and WK models?

C.) Is it true that dealers are now able to download the Flash file to perform the finalized update, ahead of the TSB release?

We know we owe you detailed information on the LX SRT8 1-2 shift hesitation TSB.

The target date to have the TSB out is 12/22. We were not able to get the TSB number for you for this chat session, as it hasn’t been assigned one, yet.

The issue (in drive as well as autostick) is that the engine accelerates faster than the transmission controller can anticipate when the shift can occur. The solution was to rewrite the software. Because we changed the calibration, we had to ensure that we did not adversely affect any other portion of the transmission calibration, which means electronic validation of the Transmission Control Module needed to be performed by our German supplier.

The shift speed for the SRT8 is and has always been 40% quicker (300 vs 500ms) than the Hemi equipped LX. The TSB will not affect the shift speed. The TSB calibration will eliminate the "comfort step" in the shift sequencing by pre-filling the 2nd gear clutch. This allows the shift to commence slightly sooner. This change may be perceived by the customer as a slightly bumpier WOT shift or an increased "Kick-in-the-ass” factor. Although it has been a long and painful wait, the end result is the issue is fixed.

Please note that a reflashed vehicle can not return to the previous calibration.

The auto-upshift feature has been incorporated in this change because it is more consistent than the driver. Everyone frequently hits fuel shutoff trying to time the 1-2 shift in autostick. The tach has some lag. It takes time to execute a shift. Nothing happens instantaneously. The TCM calculates when to start the shift process in order to execute the shift at the proper RPM. It was a hard decision to change this feature, but we think we made the right one for our customers.