tranny front seal
Thread Starter
Racer
Joined: Apr 2007
Posts: 275
Likes: 1
From: Lafayette/marquez La/tx
tranny front seal
My front seal on tranny was leaking on my 79. So I decided to relace it. Upon removing the Torque converter I noticed it had a groove cut in it. So I repalced (chance to justify a new stall one). Anyway after about 4 months of so it starts leaking again. It's a daily driver. I checked the tranny bolts to engine, flex plate bolts and torque converter bolts all of which were tight.. Any ideas
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Obviously, you did NOT replace the bushing in the charging pump 'snout'. The torque converter hub fits into the charging pump (those square slots in the hub drive the pump gear). Usually the front seal wears out because the pump bushing is shot. Since you just installed a new seal...but not a new bushing, it will just wear out in no time.
Now, you can do it all again and install just a new pump bushing. But with an 'old' automatic transmission, how long will it be until some other worn-out part shows up?
Bite the bullet and get it rebuilt when you pull it.
Now, you can do it all again and install just a new pump bushing. But with an 'old' automatic transmission, how long will it be until some other worn-out part shows up?
Bite the bullet and get it rebuilt when you pull it.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
And pack the back of the new seal with vaseline before you put it in. Driving it in can sometimes pop that little garter spring out if a new seal.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
A worn front seal is just the 'tip of the iceburg'. That seal doesn't wear out unless there is damage on the TC journal or there is heavy wear in the pump bushing. It is merely a sign that the tranmission is overdue for a rebuild.
Changing the seal is pretty easy....once you get the tranny out of the car and remove the torque converter.
But if you go that far, it would be foolish not to go all the way.
Changing the seal is pretty easy....once you get the tranny out of the car and remove the torque converter.
But if you go that far, it would be foolish not to go all the way.
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