How do you change the selector shaft seal on a 727?

Do you have to remove the valve body?

Can it be done with the trans in the car?

KD use to make a tool to do it without dropping the VB but honestly dropping the VB is pretty quick & easy, with the VB out use a screwdriver from underneath to pop the seal then a "C" clamp & a couple sockets to push the new one in.. If you want to try the tool I have one but it's kinda tight to use in the car, especially trying to tap in the new seal...

Thanks Randy,

I have the change the pan gasket because I think its contributing to the Exxon Valdez under the car. So I think I'll pull the valve body. I think the c-clamp idea sound do-able.

The car had been sitting for 22 years, so a few leaks are to be expected

22 years, those seals are gonna be harder than dirt... Have fun... Might throw a dip stick "O" ring at it too..

Thats a great idea.

Where do you think would be the best place to find all those parts? I have had lots of MOPARS but never had to do this to one.

I just got done changing the valve stem seals...the ones that were still there were like little pvc pipe caps.

This was taken after the test drive with the new valve stem seals

While you are at it ....change the KD seal too.

Pulling the VB is the plan since it(selector shaft) will probably need to be cleaned-up well (wire-brush and/or 400 paper) so it will not eat-up the new seal.

Doc's right, I should have mentioned the KD lever seal.. Speedo seal & "O" ring plus the rear seal would cover the other easy external seals...
I generally just stop by a local tranny shop to get the seals, they will/should have them on the shelf.. & it won't cost much, I'd expect less than $25.00

Transmission shop, thats a good idea. Thanks

Just did this last week on my 71 Bee

Glad i pulled the Valvebody - Like mentioned that seal was harder then dirt

So hard in fact , it started to wear a slight groove in the selector shaft itself - So i cleaned that up with a Scotch Brite Pad

Then again like mentioned , headed down to my local Tranny shop - He gave me for free , yes i repeat FREE , three seals to bee exact - Two selector shaft seals and the grommet for the pressure valve/kickdown shaft

The two selector shaft seals , one was a deeper/thicker metal case outer like the factory original , and the other was a Timken/National #8609

I went with the #8609 - It had a thinner outer metal case compared to stock , but the inner seal itself was much tighter on the shaft - It just seemed to fit/seal better , and i figured it might seal in a different location on that shaft because of the thickness of the outer case

Anyways to pull it back in on the Tranny (Tranny still in the car) i had the Exhaust close by , the tranny cooling lines close by , another words not alot of room - First i tried the Socket and C-Clamp , no such luck - Couldnt get it centered

My next try was so easy - 15/16" Socket on top of the seal , a thick flat washer on top of that with the correct length bolt going thru the middle - A few flat washers inside the tranny along with the nut , tighten the nut up , and that bolt and socket will keep the Seal perfectly centered and pull it through into the case in 30 seconds

Not a drop all week , what a beautifull sight !!!!!!!!!!! Man the mess that seal would leave after winter storage for six months year after year

Scott

Good call on the through bolt...