Neutral Safety Switch / Range Sensor Questions
 

As we approach colder weather I need to try to solve a problem with my tranny. Sometimes when it's cold out side and I start up the rig and put it in reverse nothing happens. I have to shift it back into Park and then back into reverse and it works. Sometimes when I start up the rig I will feel the tranny "jump" into gear (Park).
Here are my questions:
1- My research says it's likely to be an issue with the neutral safety swith/range sensor. Are there other things I should be looking at ?
2- Where is the nss/rs located and is it fairly easy to replace?

The mileage is 223,000+. I checked the fluid level while the engine was running, both in neutral and park. Both measurements were about 1/4" above the top hole. The color of the fluid was a light brown/tan color and I didn't see any material in the fluid. Looks like a flush and refill is going to happen very soon. I would change the filter but I don't care to lay in dirt covered in tackweed that long.

With 223.000 k+ for millage - DO NOT DO A FLUSH - clutches in trans are worn and need some grit contained in the fluid too help them bite and not slip - fluid in pan drop and filter change only

I have to apologize for my forgetfulness. That mileage is for the engine. The transmission was replaced about 5-6 years ago and probably has under 50,000 miles on it.