c4 transmission

j2quick · #1 (**permalink**) 03-07-2008, 07:27 PM

hey i have a 92 mustang with a 347 and a mighty might c4 the tail shaft seal is leaking, i have replaced the seal and it still leakes, so i replaced the seal again and replaced the yoke, and it is still leaking, it is not over full with fluid and the vent is not stopped up, the transmission has only about 700 miles since it was rebuilt. if you have any ideas please let me know, its driving me crazy. i should have left the tremec in i guess. thanks James

2stangBK · #2 (**permalink**) 03-09-2008, 06:56 PM

Not sure where the leak may be coming from because my first guess you already replaced...(tailshaft seal) Other than the leak are you satisfied with a C-4? Is it a street car or just a track car? I am looking to can the 5 spd in my GT (HCI-306) for a well prepped C-4.

j2quick · #3 (**permalink**) 03-11-2008, 07:42 PM

Quote:

Originally Posted by 2stangBK

Not sure where the leak may be coming from because my first guess you already replaced...(tailshaft seal) Other than the leak are you satisfied with a C-4? Is it a street car or just a track car? I am looking to can the 5 spd in my GT (HCI-306) for a well prepped C-4.

yes i replaced the tailshaft seal two times and also the yoke, its according to how much you like shifting gears, myself i like shifting so hind site i most likly would have just up graded from a standard tremec to at tko 600. but as far as reliability the c-4 is great it leaves a lot harder on the trans brake at 3 grand all motor then it did with the 5 speed at 6 grand on the spray. yes it is still a street car but it is too low geared for hwy speeds it has 4:30 in it now, but i have a blower and a set of 3:27 for it when i get a chance to start working on it again.

Scott V · #4 (**permalink**) 03-11-2008, 08:15 PM

I have ran into a problem like this before. Mine was a combo of problems.

Driveshaft out of balance
Bad tailshaft bushing

Here is a pic of the bushing and new seal. Hope this helps.

Bobby Kbro · #5 (**permalink**) 03-12-2008, 11:43 AM

Just a thought; have you checked the tailshaft housing for cracks. Some applications I have seen where the tranny is solid mounted, cracks appear in the tail shaft housing. You might want to get in there with an inspection mirror so you can see all around the tail shaft housing.

j2quick · #6 (**permalink**) 03-12-2008, 06:46 PM

scott you may be on to something about the bushing, i noticed it has a lot of play in the tail shaft, i have never worked on an auto trans before,other then installing them, did you change the bushing youreself? if so can you give me some advise on replacing it, or do i need to just pull it out and take to a trany shop. bobby i will check the housing for cracks also. thanks guys for youre input on this if you think of anything else please let me know. James

Fool_Fire · #7 (**permalink**) 03-17-2008, 05:45 AM

Quote:

Originally Posted by j2quick

scott you may be on to something about the bushing, i noticed it has a lot of play in the tail shaft, i have never worked on an auto trans before,other then installing them, did you change the bushing youreself? if so can you give me some advise on replacing it, or do i need to just pull it out and take to a trany shop. bobby i will check the housing for cracks also. thanks guys for youre input on this if you think of anything else please let me know. James

J2quick - what was the problem. Can you give us an update? Perhaps I can provide some tech assistance.

j2quick · #8 (**permalink**) 03-17-2008, 06:55 PM

i havent had a chance to check it, i am fixing to start working on my garage, so i was just trying to get some ideas,but i think scott was probably right about the tailshaft bushing, there was a lot of play at the tail shaft, im sure it needs to be replaced, if you can give some tech assistance on how to replace the bushing that would be great, i can work on eng, and 5 speed trans, but this is my first time with an auto i was thinking of buying a book, but any assistance you can give would be much appricated. thanks in advance. James.

Scott V · #9 (**permalink**) 03-17-2008, 07:42 PM

I have seen it done some "crude" ways, cutting the bushing with a chisel
and taking it out and installing the new one with wood and different pipes.
The way I would suggest is like I did. I took it to the trans shop
and in a matter of 5 minutes they were done and charged me like $10....
That was with the trans out of the car...Hope this helps keep us updated.

Fool_Fire · #10 (**permalink**) 03-18-2008, 06:44 AM

Quote:

Originally Posted by j2quick

i havent had a chance to check it, i am fixing to start working on my garage, so i was just trying to get some ideas,but i think scott was probably right about the tailshaft bushing, there was a lot of play at the tail shaft, im sure it needs to be replaced, if you can give some tech assistance on how to replace the bushing that would be great, i can work on eng, and 5 speed trans, but this is my first time with an auto i was thinking of buying a book, but any assistance you can give would be much appricated. thanks in advance. James.

I believe taking your transmission to a transmission shop is the easiest and quickest way to ensure your transmission will be repaired correctly.