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FE Power Forums => FE Technical Forum => Topic started by: Wreckless Warren on May 13, 2016, 07:42:15 AM

Title: Top Loader Output Yoke Weeping Gear Oil
Post by: Wreckless Warren on May 13, 2016, 07:42:15 AM
Yesterday was fluids day on the P-Code project. Bled the brakes and gear oil in the rear end and transmission. Later, we were surprised to see a small spot of gear oil on the floor at the back of the trans and thought we had a seal problem but everything was dry in that area.

We used a plumb bob to locate where it was coming from and it is at the very back of the output yoke behind the u-joint. Is there a vent in the yoke there? ww
Title: Re: Top Loader Output Yoke Weeping Gear Oil
Post by: Lenz on May 13, 2016, 09:54:31 AM
Only vent on a toploader I know of is on the top cover and that must be in working order or you can push oil out during operation.  Since you are referring to this as a project I would assume you haven't driven it though.  The front driveshaft yoke is hollow for a good portion of course but I don't know whether there's a passage where oil could seep all the way to the end to come out at the u joint.  It seems unlikely, but if the trans is over full and/or there is enough play between the output shaft splines and the inputs on the yoke then oil could get past.  I've got a spare DK yoke at home, will have to check that out of curiosity.  Someone else probably knows for sure.
Title: Re: Top Loader Output Yoke Weeping Gear Oil
Post by: Phil Brown on May 13, 2016, 11:06:04 AM
I've seen some yokes that are hollow all the way through with a flat "freeze" plug in the very end right at the u joint. If you got that type maybe the plug is leaking ? 
Title: Re: Top Loader Output Yoke Weeping Gear Oil
Post by: jayb on May 14, 2016, 10:33:31 AM
I've seen that plug in the end of the yoke too.  Warren, maybe try cleaning that area and applying a little RTV to solve the problem.
Title: Re: Top Loader Output Yoke Weeping Gear Oil
Post by: fekbmax on May 14, 2016, 02:07:21 PM
+ 3 on the plug..