Confused on 66 Cruise-o-matic, is it a C-4?

**stlzed** · 10-27-2009, 07:15 PM

OK experts, help out a confused owner of a 66 Galaxie with original 289 and the "cruise-o-matic" transmission. Is this Cruise-o-matic 3-speed tranny a C4, a C4 version, or not? Can I swap in a later-model C4 in it's place? It's starting to slip and leak, and am trying to figure out my options: just have the cruise-o-matic rebuilt, or should I/can I swap it out with a C4 that there seem to be plenty of rebuilt ones lying around for sale? Can someone straighten me out on what my options are? And whether the cruise-o-matic is really a C4 or not? Going to keep the 289 small block in it. Thanks you PROs!

**gregaust** · 10-27-2009, 11:01 PM

What does the trans look like , pan shape ? Number of pan bolts ? Over here they did call C4's cruiseomatics in Falcons

**mmerlinn** · 10-28-2009, 02:38 AM

Quote:

Originally Posted by stlzed

OK experts, help out a confused owner of a 66 Galaxie with original 289 and the "cruise-o-matic" transmission. Is this Cruise-o-matic 3-speed tranny a C4, a C4 version, or not? Can I swap in a later-model C4 in it's place? It's starting to slip and leak, and am trying to figure out my options: just have the cruise-o-matic rebuilt, or should I/can I swap it out with a C4 that there seem to be plenty of rebuilt ones lying around for sale? Can someone straighten me out on what my options are? And whether the cruise-o-matic is really a C4 or not? Going to keep the 289 small block in it. Thanks you PROs!

http://www.crankshaftcoalition.com/w...identification

**Scott66GTA** · 10-28-2009, 06:14 AM

if the case is cast iron, then it is a B-W style FMX/cruise-o-matic

**Rich27028** · 10-28-2009, 06:19 AM

you should have a fx--

i think fmx didn't come out until 68 --not sure -but i seem to remember reading it
remember there was the fx- mx- fmx- hx-- c4- c5 -c6 -different input shafts- different tail housings--different shift patterns-

**FEandGoingBroke** · 10-28-2009, 06:30 AM

C-4 came before the FMX and about the same time as the MX which is right before the C-6 and was just another version of the Cast Iron Cruise O Matic medium block, right?

That's the way I always thought anyway...

**Rich27028** · 10-28-2009, 06:47 AM

might be -- its a confuseing mess with ford transmissions-- -- better yet --dont ask me -i dont know sheet

**stlzed** · 10-28-2009, 05:07 PM

OK, sorry for the earlier lack of info on the 66 Galaxie Cruise-o-matic transmission I have. I crawled around underneath and the pan is pretty much perfectly square with 11 bolts. Has no bulges, turns, indentations in the pan from what I see, exactly square. On the left/driver side right above where shift linkage goes into the case I saw a C5 AP 7006 C. Or the last 2 digits could have been a B and a 0. But I'm pretty sure the first series is right, it was tough to see and in a bad spot, had to scrape away the crud. So again, looked like C5 AP 7006 C to me, or ending C could have been a zero. There was also a circle with a 29 in it and another circle with a 65 in it. I tried to measure the case length as best I can from where bellhousing/tranny case started to where it connected to the extension piece before tail, I measured about 10 7/8ths inches. The transmission appeared to be aluminum to me but I'm not sure, should have put a magnet to it. I know this probably won't help, but the tail had RF-C6DP-7A040-A stamped in it. Again, 289 motor, all original.

**stlzed** · 10-28-2009, 05:10 PM

One last thing, had the filler tube going right into the side of the pan on the driver side going from memory.

**stlzed** · 10-28-2009, 05:23 PM

Sorry, the filler tube goes into the pan on the passenger/right side.