Hey guys, new poster to the forum. Long time Nissan 300zx owner. I have an 86 GLL NT manual analog dash. I have decided to fix a long time problem to get the car safetied. In my reading it appears my speed sensor and oil in the speedometer cable may have been the problem. I replaced the speed sensor as suggested. I also checked the back of the gauge cluster for fluid. My question is it looks likes there is grease in the cable. It was all over the back of the mount for the cable to the dash as well. Is it supposed to be greased or is it gummed transmission fluid? I'm wanting to put it back together but need to know if I need to re grease it again. I wiped it out thinking it didn't belong. Thanks guys.

Perfect, thanks! Now I just have to get it back together lol.

So to go a bit farther, I hooked the speedometer cable back up after replacing the speed sensor. When I tried running the car the speedometer would jump all over and settle back in. Could it be the cable? When I pulled the dash apart there was no oil on the back of the gauges. Just grease. Any suggestions on where to look next? I don't want to put it back together to have to rip it apart again lol

thanks!