How well do YOU know my C6???

ToughOldFord · Post by **ToughOldFord** » Mon Mar 10, 2008 8:09 am

Yes, it's normal to see the shaft spines. That design is to give your drive line the articulation to lengthen and shorten as needed when your rear end moved up and down on it's springs.

Well, the truck's rear end anyway.

hotrod ford · Post by **hotrod ford** » Tue Mar 11, 2008 8:26 pm

not tyring to steal here but for a while a had that ratcheting, squealing sound comin from my c6. took off the insp plate and ran the truck today. had my daughter (7 yr old) hit the gad acouple of times and the noise is coming from the bell housing area for sure. i looked at the nuts that go from the flywheel to the tq converter and the side of the nuts that go with the direction of rotation with the flywheel are chewed up. what it this from? since the the plate was off i atleast know its not from that. so i guess i don't need a tranny just the internals in the bell.

fordman · Post by **fordman** » Tue Mar 11, 2008 10:37 pm

it would have to be something from the rear fo the blcok doing that to the nuts if it wasnt the inspection plate rubbing the bolts. i know there are some oil passage plugs in the rear of the block as well as a cam freeze plug. and maybe some sort of pressure switch or something like that maybe its called a oil pressure relief valve. maybe one of those has came loose and is sraping on the nuts. probably the only way to know for sure would be to pull the transmission and look at the rear of th block with the flexplate/flywheel off of the engine.

hotrod ford · Post by **hotrod ford** » Wed Mar 12, 2008 8:50 pm

if it is a relief valve, would that cause the eng act up or somthin if it was loose?

fordman · Post by **fordman** » Wed Mar 12, 2008 10:06 pm

the relief valve from what iread just lets off the oil pressure if it gets to high.

BobbyFord · Post by **BobbyFord** » Thu Mar 13, 2008 7:24 am

No pressure relief on the rear of the block.

pat67shorty · Post by **pat67shorty** » Fri Mar 14, 2008 11:40 pm

carnuck wrote:What fluid did you put in? C6 requires Dex/Merc, but I always add a can of STP engine treatment (yes, to the trans!) keeps them shifting good longer. Type F will make it shift weird. especially with the red plate clutches.

No. Pre 1976 C6 uses Type F, just like the C4 and FMX.

This is the dipstick from my 1970 C6 in my F-100.

fordman · Post by **fordman** » Sat Mar 15, 2008 12:53 am

thats a good pic. how are you doing on your warranty?

J. W. Hall · Post by **J. W. Hall** » Sat Mar 15, 2008 7:21 pm

I had similar problems (and worse) with my C6 in my F250 w/ a 360. I took it into the transmission shop recommended by some friends. It was WAY more than a few hundred to have it rebuilt, but it runs soooo nice now, 2 year warranty, and I think I'll get a lot more use out of that C6 in the future.

Hard seals won't let the pressure rise to where it needs to be. If you or a shop can put a gauge on it, see how much the pressure drops when you put it into drive. Before the rebuild, the pressure in my C6 dropped a ton. Now it holds great.

Maybe someday, I'll be able to rebuild the C6--to me, it just looked like a black box run by magic, and a rat maze worthy of a science lab.

Have someone or you rebuild it, because when you do, it will be a thing of beauty to drive.

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How well do YOU know my C6???

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