71 Satellite 360/904. Trying to get my speedo working, it used to work intermittently and I would have to press it in at the connection behind the dash. Then it went out completely and now doesnt work at all. So I ordered a new one and after removing the old one, I saw that the plastic clip that attacheds behind the dash is broken, and the new speedo that is for a 71' satellite doesn't fit at the trans connection because, Oops, I forgot that I found out that the trans is and '84 A-904, panrail numbers are PK4295887 8561 2973. So I took the new plastic clip and transferred it to my previous cable, lubed and reinstalled it, then hooked it all back up. Still doesn't work. Then I go down to the trans and take a closer look at this thing you see in the pics below.




What is it. I also found that the part of this thing that screws into the trans broke off. Thats it that you see lying beside it, and the next pic shows where it broke off at. So I fished it out and hooked my speedo cable directly to trans instead of through this thing, still doesn't work, as I expected. So, my questions are:

1. What exactly is this thing.
2. Do I have to have this thing hooked up? If so where do I find it, what do I look it up as?
3. What car do I order a speedo cable for in order to get this thing working.

Thanks
roe

Anyone? I really need some help. I don't know what it is and can't find anything kilobit they the parts stores. Also it has an electrical connector that comes offing it and plugs into the wiring down by the Trans.

I don't belive you need it in your set up. Check to see that the cable is in the speedo gear by turning the cable core at the top where it attachs to the speedometer. You shouldn't be able to turn the core if it's in the trans correctly.

It is a type of speed sensor. Used for many things. The newer cars need speeds sensors for alot of things but older cars it could be for an emission device that needs to know car speed or for cruise control. Ron

pretty sure that was an emissions or somehting like that adapter.
gave a ground signal at like 35 mph.
people have been collecting them for the od transmissions.

Correct, it's a centrifugal switch that supplies a ground at 40 mph...used on some '71 and later NOX systems.

I pretty much know it wasnt overdrive, but figured it was worth checking as guys on here have way more knowledge on this stuff than I do. Can't know for sure until you ask right?

Anyway, I guess I'll just hit the parts store and troll around until I find something thats long enough and has the right size "nut" at the trans connection. We'll see.

Thanks again everyone
roe

My 71 challenger with N-95 emissions had one of those. I just replaced the speedo cable with a cable from a challenger that didn't have N-95.

Well, I have my speedo working now. I went and trolled around two parts stores until I found something useful. I found one that was the right length and had the right size connecter at the trans, but it had the wrong connector for the dash, part# 03153 at Advance Auto Parts for $10. So I took that home and made a speedo cable with the casing and cable from the new one, and the dash connector from the old one. Then I had to disassemble and lube it, and cut the new casing down about 1" in order to get the cable to stick out far enough to engage the dash and the trans. Reads fairly accurate too. Seems to be within about 3-4 mph of the GPS speed, and sometimes it seemed t be dead on. I have to get used to reading the speedo again, and it could be even more accurate than I thought because I was trying to drive, and watch the speedo and GPS at the same time.

roe

Glad you got it figured out. I was going to suggest finding the part with the gear, that goes into the trans from a 71 and putting it in your trans. They do interchange don't they?

I didn't know that was an option. Looking at it though, I would think it should work.