Over the past 2-3 months I've been noticing a very slight bucking upon acceleration and deceleration.. both at low speeds (30mph and below). Tonight however the bucking was a bit more jarring. As I proceeded beyond a stop sign it was very noticeable. I can't replicate this on my own, it just happens on it's on. It happens at all different times and under different conditions (weather, temperature, etc etc).

The car is an 08 Base TL, Auto. Less then 35k miles. I'm the only owner.

Thanks.

 

Happens to me too, think it's normal.

 

Yeah I've been experiencing the same thing with my TL '05, but I have around 80k miles.

 

if its on a hill its the grade logic i believe ... i have the same "issue" with my 07 type S ... 76k miles

 

is the "bucking" happening when the car is shifting or while engaged in gear?

 

Good question.. I'm not 100% sure but I'm going to say while engaged.

 

Going by memory, I'm going to say that if you drive normally the TL would be shifting into third around ~30mph. So if it bucks around there or while braking/decelerating, it's probably your pressure switch. Mine does it too.

How do you fix it?
- 3x3 Redline ATF
- Switch out the 3rd and 4th gear pressure switches.