700r4 to adapter seal question

[GaryN]

Afternoon All,
Just a newbie question - am done with my first trans rebuild, ready to reattach to the t-case adapter. Any reason I can't use an o-ring instead of reapplying permatex? The permatex made separating the two a real pain in the arse. Also, does the void created between the trans and adapter fill with trans fluid? I thought not, but see fluid. The t-case has its own oil, so perhaps the adapter needs it.

A picture of the tailend of the 700r4 is here: https://www.flickr.com/photos/gneier/16265425821/

thank you,
Gary

oring found here: http://www.ebay.com/itm/151332279466

 

[chicago]

Not the same trans, but my 4l60e has a rubber O ring there.
It mates surface to surface.

K

 

[shawnfj40]

The factory used an o-ring so I don't see any reason that you shouldn't. If it was had to get off though I would take that as a sign of sealer being the way to go. I have seen this setup get loose on the trail and it no fun once it get loose having to lay under it and work if you don't have too.

 

[GaryN]

Thanks Guys, will try the oring and perhaps a very small amount of permatex.
So.. that void fills up with tranny fluid? Any idea if its under pressure? I would imagine it might be. If the seal fails, then you'd lose fluid pretty quick

 

[srgould41]

Mine uses a seal. The trans housing is vented so I would not imagine the tail section is under pressure, but I may be wrong.

 

[GaryN]

Yea, I don't know either. I suspect it at least gets fluid. My 700r4 doesn't have the tailhousing - connecting right to an Adv Adapters unit, then to a Landcrusier 60 series split t-case. Without the tailhousing, the governor plastic gear is visible inside. Plus there is tranny fluid on the adapter side. Will see how it goes.. will post a picture once I get the o-right and try it out

 

[chicago]

On mine, I KNOW it gets flid!!
My mount (when I built it) did NOT allow for enough flex...
Long story short, the adapter started to separatefrom the t cases and it leaked quite a bit.

 

[Dynosoar]

The stock seal is a square O-ring.


Dyno