Cold and Incline Slipping from 3rd to 4th or Maybe 2nd to 3rd

Is anyone else experiencing this? I can't have the dealing test it because it only happens when cold and on an incline within a minute or two after starting. My street goes uphill.

 

How fast are you moving when this happens? When you say slipping, do you mean that you have an auto tranny that is downshifting?

How cold is a cold morning where you're at?

SB

 

ECU/TCU update available to fix this symptom. See sticky

 

OP, I know exactly what you're talking about. My truck does the same thing.

 

The latest TSB made some of my shift points shittier/harsher.

I'll be snagging a shiftsense when they start selling them again. I've spent more money on dumber things, and I'd like to see how it handles bumper-to-bumper DC traffic.

 

It will do it when the trans fluid is cold. If I let the truck warm up for a couple of minutes before leaving my drive way then it doesn't do it. I have the latest TSB. Just had it done last week. It helps but not completely. It just happens faster but I can still hear it.