c6 torque convertor swapabilty
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Senior User
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From: Newhall,CA
c6 torque convertor swapabilty
Hey guys i've got a 78 f250 4x4 with a swapped in 460 and sadly my transmission is starting to die. As far as i know something in the torque converter has rattled loose and now its slipping pretty bad if i try any sort of a hard launch. A buddy of mine pulled a 351 windsor with a c6 from an 80's truck to rebuild for his mustang and he decided to use a c4 tranny, and said i can have the torque converter from the c6. The converter looks brand spankin new, seems as if the previous owner had the tranny rebuilt and the motor dumped on him not long after and he just gave up. Will this be a direct swap for my 460 c6 combo? I fully plan to rebuild it in the future but I'm just looking for a band-aid fix for a few months because I'll be leaving on a mission for my church some time during the summer and i want to get me some sweet time with my truck before i don't see her for two years 
Posting Guru
Joined: Oct 2005
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From: Oregon
I was trying to pull a 351w out of a Crown Vic before I got my 400 to drop in, I know the 351w has a different bell housing than the 400/460 (same housing). But I'm not totally sure on the torque converter...
I'm sure somebody else will chime in with details. New TCs aren't horribly expensive, but if it's all getting pulled out, you may as well do a full rebuild (make sure to add a shift kid when you do!) Wish I could be more help...
That has to be the greatest saying I've read in a long, long time
I'm sure somebody else will chime in with details. New TCs aren't horribly expensive, but if it's all getting pulled out, you may as well do a full rebuild (make sure to add a shift kid when you do!) Wish I could be more help...
Originally Posted by AirSmitty
Chevy: Like a rock. Just kind of....... uhhh..... sitting there.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
What is the C6 out of in your 4X4? Have a Ford transmission tag number?
Example: PGB-AP3
Are you sure the "rattling" noise isn't caused by the flex plate?
Example: PGB-AP3
Are you sure the "rattling" noise isn't caused by the flex plate?
Last edited by NumberDummy; Apr 24, 2007 at 01:35 AM.
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Senior User
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From: Newhall,CA
i'm 95% sure its the original c6 tranny that used to be mated to a 351m with an married np205 on the other end. I'll check the tag number tomorrow in the light. I'm not absolutely sure that it is the torque converter. I took it to aamco and they wanted a whopping two grand to rebuild it and they said it sounded like my torque converter was starting to go. I know i can get it rebuilt for less than 500 dollars but if a free torque converter can get me by for 3 or 4 months before my mission it'd be worth it. It made more of a strange whining sound than a rattling sound for a few months with no noticeable performance loss. The whining sound finally quit and at the same time that the tranny started slipping. It makes a bit of a grinding/slipping noise if i stomp on it. thanks so far guys!
Ford Parts Specialist
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From: Simi Valley, CA
There are only two C6 converters used from 1968/79 on trucks, both also fit most of the cars. Finding a rebuilt one should not only be easy, but prolly will be cheap. They have a two digit ID number like: 46, 55, 67 etc. C8OZ-7902-A or D1AZ-7902-A.
However, neither one is interchangeable with one from the 1980's.
However, neither one is interchangeable with one from the 1980's.
Post Fiend
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From: Montana Territory
I'm pretty sure they went to a Metric bolt circle in the 80s, and I highly doubt that it will fit.
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Lead Driver
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From: Albuquerque
The torque converter shouldn't slip unless it's comming apart. I would think more likely the clutches. Whatever caused it is probably putting debri through the rest of the system.
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The 460 TC is different than the other engines.
Get the proper TC of you need one.
Also, The FTE Drivetrain forum is the best place to post topics like this and it is specific DRIVETRAIN topic.
Please... !
Help make the other "System" forums better and end up like this forum .....by Posting in them.
Get the proper TC of you need one.
Also, The FTE Drivetrain forum is the best place to post topics like this and it is specific DRIVETRAIN topic.
Please... !
Help make the other "System" forums better and end up like this forum .....by Posting in them.
Ford Parts Specialist
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From: Simi Valley, CA
Originally Posted by Mil1ion
The 460 TC is different than the other engines.
Section A70.4 page 20 of the 1973/79 Ford Light Truck Parts Catalog says the two I posted above (C8OZ-7902-A / D1AZ-7902-A) are the ONLY ones listed for ALL C6's from 1973/79. (the 1964/72 Ford Truck Parts Catalog states 1968/72 C6 converters are the same part numbers as 1973/79). It makes NO difference whether the engine is a 300 I-6; 302 or a 460.
The 1980 and later C6 converters are different.
1980/89 Ford Light Truck Parts Catalog; section 60.7; page 8. No metric bolts were used on C6 converters at least thru 1989. The converter locking nuts aren't metric either. But these later C6 converters are incorrect for a 1979 and earlier.
Last edited by NumberDummy; Apr 24, 2007 at 06:29 PM.
Ford Parts Specialist
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From: Simi Valley, CA
Originally Posted by Matts72
I'm pretty sure they went to a Metric bolt circle in the 80s, and I highly doubt that it will fit.
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