C-6 Transmission Question
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New User
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C-6 Transmission Question
I am currently in the process of removing the old 351M from my 1977 2WD long bed F-150 and putting in a 351W. This will also require changing out the transmission since the C-6 on the 351M has a different bolt pattern on the bellhousing.
My question is this: I have found several small block C-6s, but they're almost all from early 70s cars. I've heard that the car C-6 and truck C-6 have a different length output shaft. Is this true? Also, are there any other potential issues I can expect to run into?
My question is this: I have found several small block C-6s, but they're almost all from early 70s cars. I've heard that the car C-6 and truck C-6 have a different length output shaft. Is this true? Also, are there any other potential issues I can expect to run into?
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New User
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Tough to say. I keep hearing conflicting things on different forums. Some people say they are the same, some people say they are longer on a truck, some say the early 70's have a coarser spline output shaft.
Laughing Gas
Joined: May 2006
Posts: 1,140
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From: Port Orchard Wa
Three tailshaft housing lengths were available, 17.4 inches for Lincoln cars, 7 inches for Ford trucks, and 14 inches for Ford passenger cars.
5 bell housings were used:
• Cleveland bell housing for the 351M, 400, and all Ford 385 family engines.
• Windsor bell housing for the 300 "Big Six" I6, all Windsor engines, and the 351 Cleveland.
• FE bell housing pattern specifically for the Ford FE family engines.
• Diesel bell housing, similar to the FE and 385 but with no interchangeable parts.
• Mel 462, a rare bell housing pattern used in the 1966 to 1968 462 V-8 Lincoln Continental and 1968 to 1970 460 V-8 Lincoln Continental.
5 bell housings were used:
• Cleveland bell housing for the 351M, 400, and all Ford 385 family engines.
• Windsor bell housing for the 300 "Big Six" I6, all Windsor engines, and the 351 Cleveland.
• FE bell housing pattern specifically for the Ford FE family engines.
• Diesel bell housing, similar to the FE and 385 but with no interchangeable parts.
• Mel 462, a rare bell housing pattern used in the 1966 to 1968 462 V-8 Lincoln Continental and 1968 to 1970 460 V-8 Lincoln Continental.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Small block is a GM term, 1978 was the first year that FoMoCo offered the C6 with 302 engines in F100/150's & Passenger Cars.
Basic part number 7060 = C6 output shafts:
Left upper: 1968/72 F100/350 / Right upper and left lower: 1973/79 F100/350.
See post 6 for 1966/79 C6 Passenger Cars.
Basic part number 7060 = C6 output shafts:
Left upper: 1968/72 F100/350 / Right upper and left lower: 1973/79 F100/350.
See post 6 for 1966/79 C6 Passenger Cars.
Senior User
Joined: May 2009
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From: Skyway, WA
When I swapped a 302 into my 76 2wd (that formerly had a 300 and 3speed manual), I converted to a C6. I believe it had come from a van. My truck had a 2 piece driveline. I had the front half of the driveline shortened and fitted with a slip yoke at a driveline shop.
The tail-shaft was pretty lengthy.
The tail-shaft was pretty lengthy.
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