700R4 vent hose

[88sub4x4]

Does a 700r4 have a vent hose? I was looking at my truck last night, 88 sub 4x4, and it looked like an elbow for a vent hose at the top of the case, but I couldn't see too well. The trans was replaced in Feb. by GM so maybe they forgot to put it back on? I couldn't find any loose hoses hanging anywhere though. Thanks in advance

 

[BlazerGuy]

Nah, no tranny that I know of came with a vent hose. Just get some vacuum line go to town! /forums/images/graemlins/tongue.gif

 

[88sub4x4]

Thanks, thats what i figured i'd have to do.

 

[BAJA_BLAZER]

They have a small plastic (they often break off) vent tube at the top facing backwards just behind the bellhousing. You can see it in this picture.

 

[88sub4x4]

Thats exactly where i saw it, but this was metal.

 

[Derf00]

As stated, they do have small plastic vents from the factory, but some rebuilders replace them with metal. When I had my 700R4 rebuilt, I had it replaced with a metal one.

 

[cybrfire]

If you ever have your trans apart far enough you can pull out the metal or plastic that is there and tap it for an 1/4" pipe thread and throw a barb in there for a rubber vent tube which of course can be run up nice and high. There is plenty of meat there to tap NPT threads in.