Help with G1 Grimlock

Is there a place that could tell me how to transform Grimlock (G1)?
I got a nm one in the mail today without his booklet and would like to see him in robot mode. His joints are pretty tight and I don't want to bust him up.
I got a nm one in the mail today without his booklet and would like to see him in robot mode. His joints are pretty tight and I don't want to bust him up.