In the FAQ section on this site it gives the following instructions,

"found that my oxygen sensor deep socket, the type with a slot in the side for the sensor wire, was a 7/8". Not only would it slip on the switch but the end of the sensor socket had a hex shape which would take a 1" open end wrench. I put the socket on the old switch, gave about a 1/3 turn with the 1" wrench and the switch came out the rest of the way with just my fingers. Reversed this to put the new switch in. Took about 10 minutes for the job once I realized the sensor socket would work. If you have this sensor socket remember it may work for this job too. "

Does that mean you don't have to lower the transmisson to get to the 4th gear lockout switch or is it saying you can use the socket when the transmission is lowered. The prior part of the FAQ paragraph I took this from says that the books are saying you need to lower the transmission. But it sounds like with the O2 sensor socket you don't. ? I've got the switch and need to replace it soon.