C4 Transmission Leak
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Fleet Mechanic
Joined: May 2001
Posts: 1,396
Likes: 4
From: Cupertino
C4 Transmission Leak
I have a 67 F100 240 with a C4. . It is lightly used, 25k miles since a rebuild 20
years ago.. A quality shop recently pulled it and replaced all seals.
It still leaks onto the driveway after sitting for five or so days, Not as bad as bfore.
I am at a loss. What could be going on? Leaking torque converter flooding seals?
Anybody have any advice or ideas?
years ago.. A quality shop recently pulled it and replaced all seals.
It still leaks onto the driveway after sitting for five or so days, Not as bad as bfore.
I am at a loss. What could be going on? Leaking torque converter flooding seals?
Anybody have any advice or ideas?
Logistics Pro
Joined: Mar 2009
Posts: 4,853
Likes: 607
From: Minnesota
Do you have any idea about where the leak is? Could be as simple as a pan gasket leak from over tightening, could be the shaft seal on the shifter shaft. There are a lot of possibilities but you need to see about where its leaking.
Hotshot
Joined: Jul 2020
Posts: 10,471
Likes: 2,633
From: Near Salt Lake City
Well, I got one for you
First off
I am no trans man
However I do have a Ford masters in Chassis and have been fully schooled and such
Means 50cents and that'll buy a cup of coffee
Buddies '64 Falcon C4 leaked, been to every shop in town, finally got me over there
It had also been rebiult and all the seals replaced and a new torque converter
It leaked when parked like yours
I pulled the trans back out and resealed the front pump oince more and a new converter gasket
#rd time is a charm, right?
Wrong!
** the damn thing had a pinhole in the dipstick tube where the mounting tab was welded on there from day1 it looked like
First off
I am no trans man
However I do have a Ford masters in Chassis and have been fully schooled and such
Means 50cents and that'll buy a cup of coffee
Buddies '64 Falcon C4 leaked, been to every shop in town, finally got me over there
It had also been rebiult and all the seals replaced and a new torque converter
It leaked when parked like yours
I pulled the trans back out and resealed the front pump oince more and a new converter gasket
#rd time is a charm, right?
Wrong!
** the damn thing had a pinhole in the dipstick tube where the mounting tab was welded on there from day1 it looked like
Last edited by manicmechanic007; May 19, 2026 at 05:21 AM.
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