What fluid for a C6?

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Old 05-07-2007, 09:45 PM
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What fluid for a C6?

Like the title says...

It's for the 1984 listed in my signature.

Thanks.
 
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Old 05-08-2007, 01:46 PM
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Mercon/Dexron III
 
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Old 05-09-2007, 03:11 PM
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Well I had a case of Mercon V here. So that's what ended up in it...

I did some searches and found several places that said it could be used.
I'll post up if any problems.
 
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Old 05-09-2007, 04:51 PM
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That should work since all Ford dealers now use mercon V for all applications.
 
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Old 05-09-2007, 08:08 PM
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We don't have much choice anymore. The last marketing licenses for Dexron III/Mercon expire June 30, 2007 and no more will be made after that date. Ford says Mercon V is the correct replacement for Mercon.

Originally Posted by lube report
...Ford is trying to wean users away from using its old Mercon product, and Ved reiterated that Mercon V is the proper fluid now for all 2007 and earlier models. No new Mercon licenses have been issued since last July, and Ford hopes to see the product fade from the marketplace. That includes issuing service bulletins to all dealers reminding them to use Mercon V only.
 
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Old 05-09-2007, 09:11 PM
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That's good.

I thought I had a leaking pan gasket. So I pulled the pan, put a new gasket in. Filled it up, then I found the true leak... The cooler return line...
Oh well. The fluid needed to be changed anyway.

What's the concensus on cutting the bad end off and splicing a new one on?
Or should I bend up a whole new line?
 
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Old 05-09-2007, 10:14 PM
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If you put a new end on there's no problem as long as you get a good flare on it. Or are you going to cut the bad end off, get a short piece of new line and fitting and use rubber hose to connect the two?
 
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Old 05-15-2007, 08:55 AM
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Replaced the cooler return line yesterday and filled it up with Mercon V.

The leak was up near the trans, directly over-top the exhaust pipe. Not the easiest place in the world to get my fat hands... Rubber hose was out of the question due to the location.
I disconnected the line from the trans and cut it about two feet forward near the straight section going past the bellhousing. Bent up some new line and used a compression fitting to connect the ends. Put it all back together and no leaks (so far).

Drove about 20 miles today. Actually I think it drives better now...
The old stuff was pretty bad, so I'm sure new fluid of any kind helped.

I'll update if anything changes.
 

Last edited by Sawbones25; 05-15-2007 at 08:59 AM.
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Old 05-17-2007, 09:31 PM
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So what kinda fluid should I run in my 1978 F150 4x4 C6 tranny??
 
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Old 05-18-2007, 07:04 AM
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What were you using in it? If Mercon, you can use that until the supply runs out and then for better or worse we're stuck with Mercon V.


Originally Posted by gustang818
We don't have much choice anymore. The last marketing licenses for Dexron III/Mercon expire June 30, 2007 and no more will be made after that date. Ford says Mercon V is the correct replacement for Mercon.
 
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