My speedo... cable

I am having trouble with my speedometer cable loosening at the transfer case connection. I am having difficulty getting a wrench on the nut to tighten it well. And as a result it leaks oil, and loosens frequently.
Anybody have any tricks.

Also, how long should an intermediate shaft last in a Dana 18? I replaced and rebuilt mine about 2000 miles ago and I'm starting to get a little more whine.

 

That speedo cable connection to the t-case has been a problem for me also. There's not room to get in there and tighten it. Mine is also leaking and I have read on here in the past that you can add an o-ring (or there's supposed to be one) at the connector to help seal in the oil. Mine does not take a wrench - it's just a knurled connector that you "tighten" by hand (well, you would tighten it if you could get your hand in there!).

The intermediate shaft will last a lot longer than 2000 miles if you used a good quality one. There are apparently many poor quality ones being sold that do not last. I paid the extra $ and got a Novak shaft several years ago.

 

I'll try the RTV , but I'll have to drop the crossmember to get at it. Thanks Chuck!

 

I had the same problem about a year ago. I was able to get an open end wrench on the adapter with very little trouble and removed it - dressed the threads - added ultra black and relaced it. Put the speedo cable back on using light pressure and a small channel lock.

No leak there any more.

Now if I could just stop the leak at the main shaft and figure out why my speedo head gets stuck, I'd have a fairly functional Jeep

 

On the jeep (69 cj-5) I got, someone had made a hole in the frame in line with the speedo connection and the cable went straight into the connector and was able to be finger tightened without any problem.