I have rebuilt the floor shift three speed toploader transmission in my 1950 F1. I have found a small leak that I'd like to get sealed up some how. It appears to be coming from the area where the transmission gear shafts are supported at the rear of the case. There is a locking rod and cotter pin in the same area. The oil seems to be coming from that general area and then runs down the bottom of the case, accumulates around the drain plug and then drips off. The oil, a combination that is supposed to replicate the 600W oil that was originally used, slowly over time drips a small puddle on the floor.

I don't recall any seals for the ends of those shafts. Has anyone else experienced this issue?

 

Not sure where you saw that 600 wt oil was spec'd or used originally, just not so. SAE 140 was spec'd. Most people use 85w140 nowadays, GL-4.

Is your trans still out? About all you can do to attempt to seal those shafts is to push them forward slightly (with the lock rod out), degrease thoroughly, wipe on some Loctite sealant or RTV in the hole, and push the shafts back. You for sure do not want to push them far enough forward that they go completely out of the case!

 

I have pretty much abandoned the idea of getting my old F-2 to quite seeping oil. The technology to keep them tight and dry just did not exist. If you can keep the oil loss to a few drops a month, you are doing well.
If you have a puddle, there may be an issue here, but a simple slick stain, typical of a healthy truck.

 

I have used the newer shafts In my V8 trans.
They are made to accept an o-ring to provide the seal.

 

Do you have the p/n's for the newer style shafts, or the applications?

 

Sorry for the confusion ALBUQ-F-1. 600W was a nomenclature for Mobil's oil spec, it is not 600 weight. What I've used is a mixture between 90w-140w oils. Thanks all for your responses.