Slick 60's

My plan is to keep the 3 speed and convert to power steering.

But I ran across a good deal on a C6.

Questions:

I know I can reuse the tranny mount, are the driveshafts different length? If so, which one is different? (longbed F100)

Other than the proper automatic shift steering column and the tranny, what else do I need?

How difficult is it to acquire all the needed parts? Im not likely to find a truck in the boneyard with a C6 that hasnt been picked clean.

dont know, the PO did my 3ps column to c4

Lokar makes a great floor shift and linkage that looks and works great on a C6 application

No floor shifting for me unless its a 4 speed in a F250 or a Mazda 5 speed in my F100.

bmcgc wrote:No floor shifting for me unless its a 4 speed in a F250 or a Mazda 5 speed in my F100.

One of the potential challenges is verifying or obtaining the correct trans lever for a column shift unless you are lucky enough to obtain a C6 which came out of a column shift vehicle. There's quite a bit of parts interchangeability between applications, but determining what works is kind of rough these days, and a considerable amount of misinformation exists. Some say the removable high floor plate is required; I've seen several applications where this was not required.
Paul

Just depends on whether the c6 is long or short shaft and length of the 3 speed. If mine had a 3 speed I'd keep it but I had long c6, changed to short cruisomatic fixing to go with a short c6 after It's rebuilt. I have the shafts for any application right now but need to hang on to em til olyeller is back running

the factory auto trans was not the c-6 but the cruiseomatic with the removable bell. people will call them c6 but that is not what they are.

notice the com has room for the flat floor where the c6 is higher

ICEMAN6166 wrote:the factory auto trans was not the c-6 but the cruiseomatic with the removable bell. people will call them c6 but that is not what they are.

notice the com has room for the flat floor where the c6 is higher

Again, interestingly, can anyone identify the type and application for the trans listed as "C4/C6 typical?
Brian, i believe the floor clearance issue or non-issue is dependent on the trans source. As you stated, the C6 was not available in slicks. The original bumpside C6's WILL fit the low floor slicks, most of the more desirable (and more common) later C6's MIGHT have clearance issues. If the early trans don't fit, it might be time to take a close look at ALL rubber insulators and the associated mounts. The only problems I have personally seen in mounting the early transmissions are either the result of various mount problems, or replacements in vehicles not originally equipped with 352's.
Paul

I looked around at cruise-o-matics. They are not as common as the C6 so they are harder to find and cost more.

The column is not hard to come by, but the shift and kickdown linkage might be.

Will those pieces off a full size car work, or must they be truck specific parts?

Im not unhappy with my 3 speed and I have a spare tranny off my parts truck. I also have everything I need to do my 3 speed column shift power steering conversion. I just need to do it.

When I think about these projects, Im learning about our trucks, I may never put in an at, but I like to lean whats involved.

C-O-M is an outdated trans. C6 is later, (but far from current), technology made to handle more power. The selector levers at the trans case will work off a column shift passenger car as will same-era downshift linkage. You will also need the kick-down bellcrank on the carburetor shaft, again the passenger car applications will interchange. Some linkage parts will also interchange but I can't readily find the info. As I stated earlier, there's a lot of mis-leading info available.
Personally, if I were were happy with the current set-up, I would not make the change, especially with a readily available spare. The hassle of putting in a cooler, or purchasing an A/T radiator, running coolant lines, chasing the inevitable small items, and making everything look and work to expectations, is effort and money I would choose to spend on other improvements.
Paul

I hear you Paul

Im only considering the C6 because I have an FE.

Lucky for me the PO installed a new radiator with the transmission cooler.

I like to collect parts for a "future project".

I have a line on a 78 F100 302/at/ps/pdb/ac for free. The body is trash, but everything I want is good.

Im thinking about transplanting the 78 into a 65/66 for the misses.

She wants a 55-57 T-Bird but she will consider a truck if I sell it the right way.

The cruiseomatic was a lot tighter fit but will cost way too much to rebuild. I'm going back to a c6 because it is stronger and can rebuild cheaper.