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All C6's created equal, or ?

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Old Nov 15, 2007 | 04:08 PM
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Question All C6's created equal, or ?

Does anyone know if, in 1975, all C6 trans were the same in 2wd f-250's? or, were there variations produced to mate up with the various rear differential ratios?? If yes, is there any way to tell externally which variation one has?
 
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Old Nov 15, 2007 | 04:24 PM
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the difference is in the bellhousing bolt pattern, not in the rear gear ratio. a C6 for a fe engine will only fit on a FE engine, a C6 from a 300 six cylinder,302,351W will interchange, and a 351M, 400, 429, 460 will interchance.
 
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Old Nov 15, 2007 | 05:08 PM
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What I'm getting at is whether within the group of C6's produced with bell housings to mate with FE engines, were they all configured the same internally or were there options available? I'm talking in terms of what's currently available in the way of customization options - things like different torque converters, or parts that would affect the stall speed or shift point, etc? For example would they have configured the trans differently for a trailer special than for a no-frills, lighter GVWR version?
 
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Old Nov 15, 2007 | 05:20 PM
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stall speed is determined by the size and construction of the torque converter, not the trans.
shift points are determined by clutch adjustment, valve body, and vacuum modulator.

the trailer and camper specials may have gotten better clutch packs, or slightly stronger internals.
but you can build a C6 any way you want to.

the one in my 88 diesel is beefed up from stock with heavy duty clutch packs, bigger pump, larger torque converter, larger pan, different springs in the valve body for firmer shifts, a different governor, an adjustable vacuum modulator, and i believe there is something different in the planetary drives also.
i paid $1200 for the trans and transfer case to be built by a friend in the business.
 
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Old Nov 15, 2007 | 05:24 PM
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my 77 250 4x4 came with a low gear set in the c-6, almost the same thing as the Ford Motorsport low gear kit i later bought for another c-6
 
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Old Nov 15, 2007 | 06:30 PM
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Gonna piggyback on this. I would assume there were the regualr and heavy duty (ribbed) cases in the big nolt pattern housings just like in the small bolt pattern housings - right?
 
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