Guy I work with his hires hand on his farm is trying to check the oil in his transmission on his 91 chevy pickup with a 5 speed. He said its a big hex shape and a 1/2" ratchet is too small in the hole. I haven't seen it myself but hoping maybe someone here knows what size off hand so they can just go buy the tool. I have a set of allen sockets that go to like 7/8 but won't see him till monday now.
