they go into it in the season 5 during the perfect cell saga
Perfect Cell Saga: 139. Saiyans Emerge
After goku wakes up from his heart virus.
when Goku trains Gohan in the chamber
goku only has 2 sons: gohan and goten. he has a grandaughter, pan and a great-great-grandson goku jr
he changes in the hyperbolic time chamber during the cell saga
Goku. Gohan has more potential, but Goku never stops training. Gohan only trains when he needs to.
Well it isn't exactly called the Time Chamber it is called the Room of Spirit and Time. and anyway Goku trained his son Gohan to become a Super Sayian and after this he fought Gohan as a sparring partner and then Goku surpassed the boundaries of Super Sayian 1 and 2 and went on to 3 and a muscle form which goku said "killed his speed".
episode 154
In episode 153 (episode 168 in the original, non-dubbed episode) of Dragonball Z, Gohan and Goku emerge from the hyperbolic time chamber. After Goku and Gohan leave the time chamber Piccolo, Vegeta and Trunks then use the chamber for themselves.
cell saga...meet me in the ring episode 153.
he did that to train him and goku and gohan would never do that tohis father
They train in the hyperbolic time chamber where one day in the real world is a year in there. they train in the hyperbolic time chamber where one day in the real world is a year in there.
when he is training in the hyperbolic time chamber with goku, his father this occured when they were prepping for the Cell Games. Gohan is about 9 or 10 years old
when Goku trains Gohan in the chamber
Goku gave Gohan a hair cut just after he turned into a super saiyan. He cut his hair since it was getting too long and it would interfere with Gohan's fighting.
Gohan turns super saiyan in episode 145 while training with his father Goku in the hyperbolic time chamber. Goku was blasting Gohan with a Kamehameha wave and while Gohan was blocking it he transformed into a super saiyan! To add to this, Gohan thinks/remembers all the times when he let his friends down, then while blocking the attack he starts to get upset/angry with himself for letting them down, then he turns super sayan for the first time, but he can calm down so Goku tells him what to do then he is in normal form again and on his knees because he is tired from transforming. I hope it helped.
While training to fight Cell, Goku and Gohan went into the Hyperbolic Time Chamber (Room of Spirit and Time in Japanese) to train. 1 year of training in the chamber equaled 1 day on earth. During that time Gohan learned to go Super Saiyan.
if you mean teen gohan then after he goes in the time chamber
Kid Gohan only turned ssj when he trained with Goku in the Hyperbolic Time Chamber. Vegeta kneed him on the stomach on namek when searching for the dragonballs