What transmission is in 2nd gen?
 

is the transmission in the 2nd gen the same aisin az6 in the 1st gen? I cant find any info on them

I believe they are the same, save for some changes in the shifting feel. There were specifics like shifting feel from 3rd to 4th that were said to be improved. I think the consensus is that both gens feel just about the same - which is a good thing!

I hope they improved 2nd gear, would be nice if people in cold countries could use that gear aswell. Its kind a big annoyance for cold daily driving.

From Toyota UK press launch material.
The six-speed manual and automatic transmissions in GR86 have both been revised in line
with the engine’s increased power and torque and to play their part in the car’s essential funto-drive quality.
The manual system benefits from a new carbon synchroniser that makes for easier shifting
into fourth gear. Using a new low-viscosity oil and new bearings ensures shift smoothness is
maintained with the higher engine output. To fully exploit the car’s performance potential,
the driver can switch to Track mode, or switch off the Vehicle Stability Control. The shift
lever has been redesigned for a short stroke and snug fit in the driver’s hand.

It is the same aisin az6 in the 1st gen gut smal,
but small changes have been made. the synchro ring on the 3rd and 4th gear has been given a coating and the shift sleeve has been adjusted