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By Kingfisher - 3 Months Ago
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I have a Merc-o-matic behind a 312 in a 1956 Mercury. Both engine and trans were rebuilt recently, however there have been enough issues since to keep me from returning to that mechanic. The latest to surface is a leaky torque converter. It's probably always had an occasional drip but it is fairly consistent now. It leaks even when the car is not running.
I've removed the inspection plates and air duct to have a good look. If I wipe everything dry and come back next day, the fins are wet. The cover plate is always dry and the transmission is dry.
So it seems to me that the fluid must be leaking down the back of the torque converter and then dripping off the fins. And if that is the case, what is likely to be wrong? A seal of some sort I imagine.
I have not removed this before, so I guess I will need to pull the trans, bell housing, torque converter together and then remove the torque converter on the bench to replace the seal?
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By darrell - 3 Months Ago
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thats right theres a seal you can get a macs and the t bird site to replace it easy job ive done a couple.pulling everything apart is the big job.
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By Hoosier Hurricane - 3 Months Ago
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When you get it apart, check the fit of the converter hub in the front pump. There should be minimum play. If it is loose, you will need to replace the front pump bushing. That will require taking the pump off (4 bolts) and taking it apart (1 or 2screws) to replace the bushing. A loose bushing will likely cause the seal to leak. Parts should be available at your local parts store. Good luck.
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By 2721955meteor - 3 Months Ago
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good advise from hoosler,while you have trans out check the drive tabs that come loose allowing torqe. converter to flop around which wears the front pump bearing.. always reinstall trans and torqe assembled so as not damaging pump drive tangs.
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By Kingfisher - 3 Months Ago
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Can anyone point to the right parts/numbers for the seal and bush? And particularly where they might be available in Australia?
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By 2721955meteor - 3 Months Ago
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may have to purchase a new front pump assembly. I would go that way as installing bushing and seal risky if you have not don this be for
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By KULTULZ - 3 Months Ago
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http://www.autotran.us/fmkits1.html
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By 2721955meteor - 3 Months Ago
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EXCELENT INFO.
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By Kingfisher - 3 Months Ago
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I got the trans and converter out today and the photos show the story maybe. The first photo is the seal - not much to see I guess, but it will need to be replaced.
The second photo maybe shows the culprit. Is this the bushing that Hoosier mentions? I can't get excited about the rough finish and I reckon that lip is about where the seal sits. So I hope replacements are available.
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By Hoosier Hurricane - 3 Months Ago
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That stub on the converter is what rides on the front pump bushing and the seal. That hub that bolts into the converter is also sealed with a seal similar to an O ring but has a square cross section. Unbolt the hub to see the seal. Where the converter halves bolt together is also sealed with a square cross section "O ring".. Any of these seals could cause a leak in the converter area.
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By KULTULZ - 3 Months Ago
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Did you find the source of the leak or did you wipe it down?
These ILL's are from the MPC -
They will give you an idea of the assembly.
The 1st - MERC 1956/59 MPC -
The 2nd - FORD 1949/59 MPC -
BASIC PART NUMBER -
7A103 - FRT PUMP ASSY
7A108 - CONVERTER STATOR SUPT
7A248 - FRT SEAL
7B258 - FRT PUMP BUSHING
7025 - FRT CASE BUSHING
Hope that simplifies it somewhat.
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By Kingfisher - 3 Months Ago
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Unlike the large O ring which is soft and rubbery, the hub seal is reasonably hard. Unless they come that way it may have been a candidate for a leak.
I took a closer photo of the hub. The seal sits just above that shoulder I reckon. Should there even be a shoulder? Does the surface look ok? The seal looks good and feels good as I slide the hub on but I'll replace it anyway.
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By Lord Gaga - 3 Months Ago
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Have you checked to see if a redi-sleeve is available? Otherwise I'd use some crocus cloth on it and hope for the best.
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By Kingfisher - 3 Months Ago
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Having dismantled things it would appear that the front pump bushing and converter hub seal were 'old' and maybe at fault - somewhat disappointing after paying for a rebuild. So I've ordered those and a front pump seal and converter cover seal. I also dug deep and ordered a new converter hub. I'm not convinced that mine is particularly worn, but I don't want to pull it all out again. Now I just have to wait for the slow boat to Australia.
Thankyou all for your help. I'll let you know when it all works.
Cheers, Mark
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By Kingfisher - Last Month
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Just an update folks.
I replaced the converter cover seal, hub seal, converter hub, front pump seal and front pump bushing. I'm reasonably convinced that the hub and bushing were at fault as they showed visible wear. Fatsco in NJ were great for all parts. It's all back together and not 1 drip to be seen.
Thank you all for the advice.
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By 55blacktie - Last Month
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Good job! When I inherited my 55 Tbird, everything but the brakes leaked. I hope that's not the case when it's put back together.
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