Reinstalling the propeller shaft. It’s been a year since I removed and cleaned it, so I can’t remember if it is just lubricated by transmission fluid, or if it needs its own grease.  Should I be greasing before I insert this back into the trans?

 

That gets soaked with transmission fluid.  Some grease on the seal might help it slide in but once it's in and the transmission filled it's wet with fluid.

If you put grease in the slip yoke you might even create a hydraulic seal that puts pressure on the output shaft.  Might not even be able to get the shaft installed because of the air pocket or excess incompressible grease.

It would be a fun and messy experiment.

Edited September 13, 20204 yr by Zed Head

1 hour ago, Zed Head said:

That gets soaked with transmission fluid.  Some grease on the seal might help it slide in but once it's in and the transmission filled it's wet with fluid.

If you put grease in the slip yoke you might even create a hydraulic seal that puts pressure on the output shaft.  Might not even be able to get the shaft installed because of the air pocket or excess incompressible grease.

It would be a fun and messy experiment.

As usual Zed, you are amazing. At some point I will figure out a way to repay you.

It's burned in to my brain since the time I forgot to drain the fluid when I was helping a friend change his clutch.  He thought I knew what I was doing until the fluid started pouring out on to me when I pulled the drive shaft.  It was a 68 Firebird but they're all similar.