[Robby]

As I read this thread, I'm leaning towards paranoia.

This 6 speed auto, under normal throttle positions (means not deep throttle) engages the lock up torque converter and applies third at the same time.
As a result, the 2nd to 3rd upshift often is interpeted as 'Harsh' when compared to the other upshifts........the description currently fits for normal operation of this unit.

It has been so long since your car has operated properly I suspect you are somewhat 'Hypersensative' to every action the car makes.
The slight flare you see is the torque converter locking immediately behind the 2/3 upshift IMO.

Rob

 

[Robby]

Naturally, from where I sit, I can only go on your descriptions.

Untill the trans fluid attains a pre determined temperature, the torque converter lockup is disabled.......so, that lines up with your experience when you drove it 'cold'.

The torque converter, when it locks, is almost instant......that could translate into your perception of the engine/driveline rocking.
It could also be an indicator of a failing motor mount......Lord knows they have been disturbed enough times.

But since this feeling is new and occured after this described downshift event, my thoughts are leaning more towards a motor mount concern.

Like I said, best I can offer from my desk.

Rob

 

[Robby]

Generally one failing mount won't harm much more than your nerves.

Rob

 

[Robby]

Well I am just glad & hoping my transmission isn't going bad. & have some relief that my car shifted smoothly when not on the gas going into 3rd, so I may get appointment setup & see if the mount(s) are going bad & if so go ahead & get them replaced under warranty.

So Robby, would you be more inclined on thinking this is a mount(s) issue where the 3rd gear shifted smoothly while not on the throttle at all. Because again as I was in 2nd gear & right before it hit the shift point RPM I let off completely on the throttle & watched the RPMs drop & that is literally only way I could tell it was in 3rd, plus after the initial shift I confirmed it was in 3rd by pushing it over to M+ to see - so that made me feel a little better in hopes it wasn't more major.

I would rather not speculate further untill a tech. has had a look/see.

Rob