C4 question

splavin90 · Post by **splavin90** » Wed Jun 07, 2006 2:24 pm

is it very hard to rebuild a c4 tranny? i have a C-4 in my truck and it doesnt work at all. is a c6 better than a c4?

splavin90 · Post by **splavin90** » Thu Jun 08, 2006 2:39 am

dang. is everyone afraid of automatics?

Post by **DuckRyder** » Thu Jun 08, 2006 6:05 am

Both the C4 and C6 are good transmissions, either one should be no great problem for someone with good mechanical skills. (I would liken it to rebuilding an engine) You need books and a very clean working area.

As for which is better... Better For what? The C6 is both stronger and much heavier, as such it will absorb quite a bit more power in operation.

It is all about picking the right one for the application.

basketcase0302 · Post by **basketcase0302** » Fri Jun 09, 2006 4:06 am

splavin90,

Keep in mind the inherit/recall problems with the C-4. They had/have a tendancy to jump out of park into reverse. I've owned 4 or 5 through the years and my 79 as well as the 71 Chero do just that!

Go with the C-6

Basketcase

pat67shorty · Post by **pat67shorty** » Sat Jun 10, 2006 12:15 am

Irrelivant. C6's did the same thing.

C4's are mildly more complicated to rebuild than a C6. The C6 is stone age simple tech.

splavin90 · Post by **splavin90** » Sat Jun 10, 2006 12:45 am

well i was just wondering how hard it is to rebuild i c4 cause i just bought a truck with a c4 a 69 f100 w/240 streight 6 and i don't think c6's bolt up to it. but i think that i am going to be dropping my 390 in it and puttin an np435 behind it.

Ford_Doctor · Post by **Ford_Doctor** » Sat Jun 10, 2006 1:17 am

Some C6's were made with the small block bellhousing but they are rare, were only used in postal rigs as far as I know, and were popular with some drag racers.

basketcase0302 · Post by **basketcase0302** » Sat Jun 10, 2006 5:02 am

pat67shorty wrote:Irrelivant. C6's did the same thing.

C4's are mildly more complicated to rebuild than a C6. The C6 is stone age simple tech.

67, Not picking on C-4's but I've chased a few down the road in my time. Old age remembers the recall on them. Was there ever a recall on the C-6?

Thanks in advance.

Basketcase

Post by **FORDification** » Sat Jun 10, 2006 9:05 am

Ah, OK, I see what you're thinking. I know it's tempting to try to use the C4 behind the FE, since you've already got it, but it just won't work...plus it probably wouldn't hold up as well as the C6 IMO. If you're considering an automatic, just bite the bullet and just get the C6 which matches the FE, and you'll be set.

72hiboy4x4 · Post by **72hiboy4x4** » Sat Jun 10, 2006 9:20 am

the c-4 is behind the 240, but he's got a 390/np435 in his parts truck that he wants to drop in his new truck now.

pat67shorty · Post by **pat67shorty** » Sat Jun 10, 2006 12:03 pm

basketcase0302 wrote:
pat67shorty wrote:Irrelivant. C6's did the same thing.

C4's are mildly more complicated to rebuild than a C6. The C6 is stone age simple tech.
67, Not picking on C-4's but I've chased a few down the road in my time. Old age remembers the recall on them. Was there ever a recall on the C-6?

Thanks in advance.

Basketcase

Yeah. It was more of a Ford shifter thing than a specific trans thing.

And small block bell pattern C6's are far from rare if you know where to look.

Every Ford van that had a 300, 302, or 351 used one until the AOD was intorduced in the 80s. from 1973 on, truck and car trans were both long tailshaft, so they interchange.

Ford_Doctor · Post by **Ford_Doctor** » Sat Jun 10, 2006 1:56 pm

pat67shorty wrote:Every Ford van that had a 300, 302, or 351 used one until the AOD was intorduced in the 80s. from 1973 on, truck and car trans were both long tailshaft, so they interchange.

Not all of them! I had a '74 E200 with a 302 that had a C4 behind it.

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