That's the binary-bonded partner for the Autobot Motorvator Lightspeed. The Motorvators were released as part of G1 in 1991 and were repaints of the Autobot Brainmasters, but without the component parts to form Roadcaesar. Lightspeed is a repaint of the Brainmaster Braver.

P.S.: these kinds of questions can be posted in "Kup's Discussions and Questions" section.