First gears are not happy

[grounch]

Hello there

Since i have the car i have that infamous jerk from 2 to 1 when coming slowly to a stop (red light or stop). Putting in S mode make it downshift earlier and almost remove the jerk.

Now i changed the rear tires couple of weeks ago.
I know, should change all the 4, but it was urgent before travel as the rear ones were shot and front ones still have around half thread - the difference probably comes from my old steering angle sensor issue which disabled the 4x4.

Since that (i don't think it was present before or very light) i have some weird feel on low gears (1 and 2) on very slow speed and low rpms, between 800 and 1500rpm.

It feels like micro gas cutout, or small jerks.
When putting more gas, no issue and the gears pass fine.
When driving at the same 800/1500rpm range in higher gears, no issue.
Seems to not happen when the car is cold.


Where could that come from, and how to get rid of? Do i really need to change the front tires as well? As it's a 2005 facelift model i understood that the 4x4 system is more permissive than the pre-facelift.