O/T: '91 Dakota manual trans question

MeAnthony

Member
I have a '91 Dodge Dakota, 3.9L V6, 5 speed manual, 4x4. The transmission is a NP535/NV2500.

Now the problem: at the rear of the trans, on the top passenger side corner(about 1:00 o'clock position when viewed from the rear), there is a hole drilled in the case. It's a smooth bore, no threads, about 5/16" or so diameter. I am losing transmission fluid out this hole. I spoke to parts guy at the local Dodge garage this afternoon. He says yes, parts diagram shows a one-way valve of some sort there but is labeled NS-1, meaning no longer manufactured? So...no help from the Chrysler camp.

There is a metal pipe nipple on the top of the trans case, just behind the shifter, where the breather hose is attached.

What is this valve and where can I get one?

I don't recall ever seeing two vents on a transmission before. Can anyone explain why it has two?

Thanks,

Anthony
 
Not sure , but I believe he just meant it is "Non Serviceable" I think that transmission was used in the Jeeps as well. Maybe someone on a jeep forum can help?
 
It's not a vent just a little air "one-way-valve".

If you can take a mirror and peer down into that hole, you'll see it has a shoulder 'bout 1/4" down.

The little plastic check has come out. Put a welsh plug in it's place (earlier ones had the plug anyway.

You can get one at any hardware store.

Allan
 

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