He's right, there's an electrical connection that you pull, then unbolt the shaft with like an 11mm wrench or so. Pull the shaft out, pop the retaining clip off the gear, pull the gear out, put the new one in, and put everything back together. 10 minute process, as long as your catalytic converters are somewhat cool. I crawled under mine to change my gear and about burned the **** outta my arm cuz I had just got back from lunch.