When going from first to second gear. It's. fine, but when it goes from second to first gear. It does a very aggressive. Jolt And also when jerking the wheel left and right. It makes a good good clunking sound
Is it a regular 6 speed auto?
How many miles are on?
When have you changed the ATF?
Open your hood and check it, it’s the red dipstick (Assuming it’s the 6 speed) - post your findings on the forum so we can assist you.
In theory, assuming your fluid is fine - you can do a relearn procedure.
(Hyundai-Kia’s 6 speed does have a tendency to adapt well to upshift smoothly but often do not adapt well to downshifting without shift shock.
The fact the values your car initially used now cause such a shock usually incites that either your transmission rad is dirty and it has been running hot, or that your fluid is past due for replacement - sometimes it just needs a relearn but that’s assuming the fluid is at worst brown and not black)
It's has 94k 6 speed auto. And no I haven't changed atf yet. Would it be a good idea to clean the Selenoids to
What do you mean by “clean the solenoids”? - cleaning out a valve body requires disassembly and equipment.
At 96k miles, it might be to late to change the ATF for the first time, it can be all charged and burned.