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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
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Old Jun 26, 2013 | 08:43 PM
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trozei
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Bell Housing

I'm also asking this in the bumpside forum.

I have a 1969 F100 with a 300 I6 and a C4 automatic. I also have a 1973 F100 with a 360 V8 and what I'm assuming is also a C4 automatic.

I want to swap the engines in the two, AKA build the 360 into a nice 390 and throw it in the '69 (which is a nicer truck in every aspect compared to the '73 I have - pictures on profile). Are the bell housings the same, or would I need to swap the transmissions as well? I'm currently rebuilding the '69's tranny with a bit of a performance kit and would like to keep it.
 
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Old Jun 26, 2013 | 08:56 PM
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Originally Posted by trozei
I'm also asking this in the bumpside forum.

I have a 1969 F100 with a 300 I6 and a C4 automatic. I also have a 1973 F100 with a 360 V8 and what I'm assuming is also a C4 automatic.
It's a C6, C4's were not used with FE engines.

I want to swap the engines in the two, AKA build the 360 into a nice 390 and throw it in the '69 (which is a nicer truck in every aspect compared to the '73 I have - pictures on profile).

Are the bell housings the same?
Bell housing: M/T / Converter housing: A/T

C4 has a converter housing, C6 converter housing is made as part of the transmission case.
 
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Old Jun 26, 2013 | 09:10 PM
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You don't have to assume on the 73. C4 has 11 bolt pan and is square. C6 is L shaped (or rear edge of the pan is S shaped) and is 17 bolt.
 
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Old Jun 26, 2013 | 09:16 PM
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Originally Posted by march
You don't have to assume on the 73. C4 has 11 bolt pan and is square. C6 is L shaped (or rear edge of the pan is S shaped) and is 17 bolt.
C4's were not used with FE engines in cars or F100/350's.

1968/76 F100/350 360/390: ONLY A/T available: C6.

C4: 1965/74 F100/250 240/300 I-6 / 1965/74 F350 240 I-6 / 1969/77 F100 302 / 1975/77 F100/250 300 I-6 / 1975/77 F150 302.

1978: C6 available for the first time with 300 I-6 & 302, but some still came with C4's.
 
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Old Jun 26, 2013 | 09:30 PM
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Every other source I see claims it to be the C4. I was under the impression that the C6 is for the 250 and up.

My pan is square.
 
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Old Jun 26, 2013 | 09:39 PM
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Originally Posted by trozei
Every other source I see claims it to be the C4. I was under the impression that the C6 is for the 250 and up.

My pan is square.
Your 1969 F100 300 I-6 has a C4, as it was the only A/T available. Your 1973 F100 360 has a C6, as it was the only A/T available.

C4's not used with FE engines. C6 introduced in 1968 F100/350 360/390. Both engines were cancelled at the end of the 1976 model run.

But, if the '73's engine was swapped from a 1965/67 F100/350 that came with a 352, the only A/T available was M/X Cruise-O-Matic, also installed in 1965/72 F350 300 I-6.

Left: First page of C6 parts list from 1964/72 Ford Truck Parts Catalog / Right: M/X Cruise-O-Matic, notice shape of pan and separate converter housing.
 
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Old Jun 26, 2013 | 09:52 PM
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My '69 has a C4 and my '73 has a C6.
 
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Old Jun 26, 2013 | 09:59 PM
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Originally Posted by trozei
I have a 1969 F100 with a 300 I6 and a C4 automatic. I also have a 1973 F100 with a 360 V8 and what I'm assuming is also a C4 automatic.
Originally Posted by trozei
My '69 has a C4 and my '73 has a C6.
But, that's not what you said originally.
 
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Old Jun 26, 2013 | 10:16 PM
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I said my '73 had what I assumed, as in there's an area of uncertainty, that it had a C4, which I'm also assuming you read since you quoted that very sentence. I just went out to look at both trucks, and the '73 has a C6. I suppose I answered my own original question.
 
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