I tried doing a search but could not find an answer.

Today I noticed my transmission is leaking quite a bit of fluid with the engine running.  It is not coming out of the transmission itself but is actually coming out of the drive shaft yoke.  The rear transmission seal is dry as is the driveshaft yoke.  But on the back side of the yoke that faces the U-joint is wet and its dripping off one of the U-joint caps.

I know on certain scrubrolets they had a hole in the drive shaft yoke that they would leak from.  The fix we use at work is placing a solid steel spacer in to block the hole or welding the hole up.

I do not want to attempt this so this post is to ask how does one correct this issue?  It hasn't done it till now and the engine I got running again this past March/April.



~Update~

I did some reading and found out that the hole is for the slip yoke to slide without building pressure inside of the slip yoke.  I also found that on scrubrolets they have a Oring but my shop manual and even my parts and illustration guide shows no seal for this.

Now the question I am asking myself is I did jack the car up quite high by the frame to replace the front wheels as I took the spare off both sides (spare from my Mercury and spare from my '56) and installed the factory wheels back on with new radial tires I had installed today.  I am wondering if this caused this by shifting the fluid back resulting in the slip yoke being overwhelmed.  But then if that is the case what keeps the fluid from leaking out like this when you are going up hill.

I will be heading to bed as I post this as I cant wrap my head around this and I hope to hear something by tomorrow if not I will probably pull the driveshaft and cut a cork gasket material to fit the inside of the slip yoke and jam it up against the small hole to plug it.  Hate to do this if the purpose is to allow the slip yoke to slide without building internal pressure inside the slip yoke.



1956 Ford Fairlane Town Sedan - 292 Y8 - Ford-O-Matic - 155,000 mi