"tranny shudder" at 45-50 miles per hour

[charlie9092000]

I am getting "tranny shudder" at 45-50 miles per hour when using 89 performance mode, it doesn’t do it when at stock or when the custom 89 tow tune is used.

I have 2005 5.4

The invoice # is 4469 invoice date is 5/4/2011
Hex RXCM5E4

Any help would be great .


Charlie

[Longshot270]

If you have the monochrome gryphon try raising the torque converter lock/unlock points.

[Jackpine]

Originally Posted by Longshot270

If you have the monochrome gryphon try raising the torque converter lock/unlock points.

He could do this with the CS/CTS platform too, Longshot.

- Jack

[charlie9092000]

I have the monochrome gryphon , any suggestions on the values that I need to enter? Should I copy the values that the tow mode is using?

[Longshot270]

In the custom tuning options you'll find torque converter lock points. These are speed and throttle based events that when the vehicle reaches the point the torque converter locks or unlocks. Your vehicle is currently sitting in a grey area where it can't make up its mind. Go to that setting in the custom options menu and raise both the locking point and the unlocking point by one and give it a drive. Keep raising it until the shudder goes away.


The tow tune will most likely show 0 for the locking/unlocking points because these settings are a change from the baseline.

[charlie9092000]

I raised both the locking point and the unlocking point by two and that fixed the issue.