Yeah, as far as I've seen and practiced modern competitive SJ doesn't.
It is possible to speculate that they existed in the past and were evident in the influence on Japanese arts. But that is speculation based on legend and apochrypha. Unless someone can point to something more substantial I have to basically say no.
Mongolian wrestling which influenced Shuai Jiao does have some form of submission wrestling. The extent of the influence of these techniques on Chinese wrestling is debatable.
http://en.wikipedia.org/wiki/Mongolian_wrestlingThe Secret History of the Mongols (written in Mongolian in 1240 AD) in Chapter 4, Paragraph 140 records a wrestling match between Buri the Wrestler and Belgutei that took place in Eastern Mongolia on the Year of the Monkey (1200 AD):
One day Genghis Khan had Buri Bokh and Belgutei wrestle each other. Buri Bokh belonged to the Jurkhin tribe. Formerly Buri Bokh was able to hold on to Belgutei by one hand, drop him to the ground by one leg and keep him immobile there on the ground. Buri Bokh was a nationally famous wrestler. However on this occasion when Buri Bokh and Belgutei were made to wrestle with each other Buri Bokh fell on the ground despite being an undefeated champion. Belgutei managed with great effort to press Buri Bokh down at the shoulder and proceeded to sit on his belt area. He then glanced at Genghis Khan from the corner of his eye. Genghis Khan bit his lower lip. Belgutei understood the meaning of this, held Buri Bokh firmly, jerked him at the chest and buttocks and broke his back. Buri Bokh said with his back broken: “I never lost a match to Belgutei. I fell purposefully to please the Khan out of fear but now I have lost my life.” Having said this he died. Belgutei broke his back, dragged him and then left his body.