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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

What tranny do I have?

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Old Aug 19, 2008 | 10:01 PM
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What tranny do I have?

I thought I had a C6 in my 84 but my dad told me yesterday that it's not a C6 but a THX or something like that. I've never heard of it, do any of ya'll know what he's talking about? What is this thing and how good is it? I thought I had an indestructable combo but now I may opt for an overdrive tranny if this one isn't that good. All I know for sure is that's it's a non-overdrive auto behind a 351W in a 4x4. Thanks.
 
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Old Aug 19, 2008 | 10:29 PM
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THX... Maybe FMX, but I doubt it. Is it all one piece, all aluminum? If so, C6.

Diagram here, check the pan shape:

http://www.**************/myfiles/transmission.jpg
 
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Old Aug 19, 2008 | 10:36 PM
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Yeah that's it FMX, thanks for the link, I'll look tomorrow. I can't remember off hand ir it's one peice or not. What's an FMX and is it as good as a C6?
 
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Old Aug 19, 2008 | 10:39 PM
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FMXs were used in the 60s & 70s. If memory serves my they weren't bad trannys. I believe they were behind engines like the 429s etc.
 
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Old Aug 19, 2008 | 10:43 PM
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It's not going to be a FMX unless someone swapped it in.
 
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Old Aug 24, 2008 | 03:13 AM
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Originally Posted by Shade
Yeah that's it FMX, thanks for the link, I'll look tomorrow. I can't remember off hand ir it's one peice or not. What's an FMX and is it as good as a C6?
If it has a castiron body then it may be a FMX, As to whether they are any good. I've never been able to break one yet. And they were out when I was a kid.
 
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