What gearbox are these cars running?

Are the same as the tarago of the same vintage?


Problem:

only sometimes when pressing the throttle I get like a slight miss sensation or jerking which feels like with gear changes.

Besides that the car shifts up find and downshifts fine and smoothly.

Definately not engine as it only happens with that condition.

New spark plugs too.


I have checked the transmission fluid. Wiped it on a piece of white paper. Its reddish but has slightly burnt stuff on the side.
So first things first I am changing the filter and ATF. Hopefully thats all that is.