Hey guys, I have a 74 LT I just picked up recently, going through locating leaks and trying to replace what I can. I have a leak at the transmission pan (TH350), no biggie, but I'm also finding red fluid on what I'm assuming is the speedometer cable. There are two parts. the first is attached to the extension housing, then goes to the subframe, attaches to some other "thing", then another cable goes up through the firewall. All the couplers look pretty good but I keep finding a little leak and a small puddle under that "thing" and I don't know what to call it to either replace or repair. Both pieces are driver side. If I can attach these two pics...

 

Probably the O ring on the speedo sleeve. The O ring can be easily replaced once you pull it out. Ignore the part labeled "stealth conversions".