So I've found a couple of C6 transmissions on craigslist, one a recent rebuild that is close by. I have a 390 in my 74 (though it is not a truck 390 but a 67 Fairlane 390). Which engines would I need to look for (and years) that would have a compatible bell housing?

Thanks!

 

Any transmission with the FE series bell housing bolt pattern will bolt up. It won't matter if its from a truck or car.

 

so only the FE engines?

 

so basically, as it applies to our trucks, just the 390 or 360 engine. Damn. that could be harder to find...

 

If your needing a 2wd transmission then you don't have to narrow your search to trucks specifically.

 

So is the C6 different for a 2WD versus a 4WD?

 

Unless your 74 is an F250, then the transmissions are different between 4x4s and 2x4s

 

so if the donor truck is a 4WD but is an F250, the transmission would work in my F100 2WD?

 

To the OP, hold on, I have a question for these other folks.... I've never had a highboy, do they have a slip yoke on the output shaft???

 

"Highboys" have a fixed yoke on the transmission. If the F250 has a divorced mount transfer case, then you can use it on your 2wd 74.

Driveshaft modification may be needed.

 

That's what I thought. Thanks

 

The transmission you need isn't too hard to find, its just a regular C6 transmission, nothing like what is posted below, that is Highboy specific. You just need to look for one with a FE bell housing.

Highboys have a specific transmission when your talking about the C6. You can't just use a regular 2wd transmission (well you can, I did but you need to mod the T-Case lever thingy), the C6's that were in the Highboys originally have a different tail shaft. that tail shaft have a hole in it for the T-Case lever. These are very very hard to find.

Here is a pic of the different bell housings.

 

One more question - i just called a guy about 30 miles away. He has a good running C6 behind a blown 390, in a 1975 F100 (I think it's a 75 - Mfr. date says July 1975), but for some reason, he's telling me there's a floor shifter. Would there be any issue buying a C6 that has the floor shifter? Is just the linkage different, so I could use mine?

 

Probably what he is talking about is that he doesn't have all the little linkages and such but if you have a C6 already you can just use the ones off of your transmission.

 

the previous owner had done a hack job and converted to floor shift. It's a Ranger XLT F100, 2WD, 390. I guess it could be a 76, but maybe 75...