Kickdown Solenoid - leaking?

[BENZOMANIAC]

Hey All!

I have this tranny leak in a 87 300E that I thought was coming from the kickdown solenoid. I replace the o-rings and crush washer and re-installed. Still leaks.

My question- Is there any fluid in the kickdown solenoid magnet coil housing? By design it looks like fluid passes through the bolt/valve but not in the solenoid housing. So there is no way it can be leaking, right? I bought a new solenoid housing but didn't install it because I noticed the fluid flow design when it was out.

BTW - Does anyone know if the case seal that is on gear selector and behind the neutral safety switch can be replaced with trans in car? This looks like the only other place that could be leaking.

[BENZOMANIAC]

Any 722 Tranny pros out there?

[Strife]

I have a spare one for my transmission and it looks like a coil made in cast epoxy - I can't see it leaking unless actually cracked.

[BENZOMANIAC]

Hey Strife,

Are the Orings on the solenoid bolt for dust, or fluid? Is there fluid in the housing around the bolt or for dust? My old solenoid has a rough mark in surface where the outer-most o-ring sits, but so does the new one I just bought. I didn't install it because I am going to send it back for another as I don't think the inner hole should be rough/paint flaking, like that. I'll try and get a clear enough pic tomorrow to post.

[david s poole]

first you shouldn't use crush washer between solenoid housing and trans case.the o rings are designed to seal and use of crush washer affects the depth of solenoid in the case.you need to check the large o ring or replace it and yes the selector shaft seal can be replaced from outside.

[BENZOMANIAC]

The Crush washer is factory and I replaced with new one from dealer. I don't understand how the trans case to solenoid connection wouldn't leak without the washer installed.