727 oil leak

[westcoastdodge]

hey guys,need to replace that small seal on the selector shaft,it seems to p*** out when been parked is there a seal kit that is maybe available on ebay or whatever to do the job.is it do-able with trans in car thanks in advance guys

[tan top]

 really need  to drive  the oil seal on there square , i done mine with the box out , , valve body needs coming out also , so you can drive the old seal out ,  well thats how i done mine   , but there are guys on here know far more about 727s than i ever will , they prolly have a better way  

[Tilar]

I thought a 727 was designed to leak?    Every one i've had has leaked.

[Bob]

This a thread I did back in 2009:

Took about 30 minutes to get the old seal out with the transmission still in the car.
Removed the transmission mount, lowered the rear of the tranny. This will give enough room to play around. Disconnected the speedo cable, rear trans line, and linkages.
Removed the 2 shift/kick down arms.
Made a semi special tool, heated a long skinny 6" flat tip screwdriver bent to a 45 degree angle.
Pryed out old seal.
Remember to have the new seal ready to go in. The trans fluid ran into the drip pan since yesterday. About 2 quarts.
Today I will stop by NAPA and pick up the seal. 6 bucks.
I will use a socket and tap the new seal into place.
It's a good thing I had a spare tranny in the garage to practice on.
So, it is possible to change the seal with the tranny in the car.
There is actually 2 seals. There is a small rubber one that goes over the kick down rod that goes up through the shift select shaft. This one was not leaking. I used a mirror and observed the shift shaft seal for an hour and sure enough that is where the leak was.

It was easy installing the seal. Place a socket over it, use a small hammer and tap it right into place. I checked this morning after topping off the fluid last evening and not one little drop. Saved a lot of time and hassle by doing it this way. I did use your part number because the auto parts stores could not find it using there questionable search tools.

Bob

[Nacho-RT74]

I removed valve body ( pan gasket was getting damaged too anyway ) and used a bolt, nut, socket and BIG washers to install the seal.

[westcoastdodge]

cheers guys,there is some royal wedding or something going on overhere next week and got a couple o days off work,will have a play