understanding 4R100 Torque Converter Problems
Thread Starter
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Postmaster
Joined: Dec 2010
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From: Gary,Indiana
MERCON won't damage the seals on your old C6. It will, however, completely destroy the clutches and bands, requiring a rebuild.
Ford switched to MERCON from Type F in either 1977 or 1978. A 1976 C6 MUST have Type F or the frictions are going to slip and destroy themselves.
Ford switched to MERCON from Type F in either 1977 or 1978. A 1976 C6 MUST have Type F or the frictions are going to slip and destroy themselves.
Once again you saved my BUTT and I am glad I asked you before doing anything. So for now I guess I just leave it alone until I find type F. Which I don't see happening because I don't think I have seen type F in at least 15 years. But I haven't looked for it either.
Hotshot
Joined: Dec 2006
Posts: 14,069
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From: Melbourne, Ky
Thanks Mark !!! Once again you saved my BUTT and I am glad I asked you before doing anything. So for now I guess I just leave it alone until I find type F. Which I don't see happening because I don't think I have seen type F in at least 15 years. But I haven't looked for it either.
Once again you saved my BUTT and I am glad I asked you before doing anything. So for now I guess I just leave it alone until I find type F. Which I don't see happening because I don't think I have seen type F in at least 15 years. But I haven't looked for it either.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
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From: SE Florida
Ford won't have it. I don't know of any other fluid that is compatible with Type F. Quite a few auto parts stores still sell Type F. If they don't have it in stock the better stores can order it.
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Postmaster
Joined: Dec 2010
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From: Gary,Indiana
I'll do that Mark start checking parts stores and stock up when I do find it.
Last edited by BadDogKuzz; Aug 31, 2012 at 12:58 PM. Reason: Change late post!!
New User
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Mercon
Hi Mark, I have a buddy that did his tranny flush, he has a 2000 f-250 7.3 automatic, I told him to use mercon v or moble 1 synthetic, he could only find mecon dextron his said. Is that going to hurt his transmission? Does he need to drain and reflush with correct fluid?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
Likes: 2,651
From: SE Florida
Good luck with that.
The 4R100 left the factory with MERCON fluid. It won't hurt it.
Hi Mark, I have a buddy that did his tranny flush, he has a 2000 f-250 7.3 automatic, I told him to use mercon v or moble 1 synthetic, he could only find mecon dextron his said. Is that going to hurt his transmission? Does he need to drain and reflush with correct fluid?
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New User
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Ok, thanks Mark, I will let him know, so far my transmission is working perfect, Im the guy that has the 2001 ford F-350 7.3 with 28,000 original miles, just had it flushed with the correct fluid, am hoping that it lasts for many more miles, also will be installing the 6.0 cooler soon.
Thanks,
Terry
Thanks,
Terry
Logistics Pro
Joined: Apr 2010
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From: Panama City, FL
Ed, I still use type F in my 2 73 fords. I just bought 15 quarts from Advance Auto about a month ago. They have it on the shelf.
Mark, I had my orginal C6 from my 75 F150 rebuilt in 01 and before that I used Type F and after the rebuild I asked the guy if I still use Type F and he said no that I need to use mercon. Would those new parts he installed be for use with mercon and not type F?
Mark, I had my orginal C6 from my 75 F150 rebuilt in 01 and before that I used Type F and after the rebuild I asked the guy if I still use Type F and he said no that I need to use mercon. Would those new parts he installed be for use with mercon and not type F?
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
Ok, thanks Mark, I will let him know, so far my transmission is working perfect, Im the guy that has the 2001 ford F-350 7.3 with 28,000 original miles, just had it flushed with the correct fluid, am hoping that it lasts for many more miles, also will be installing the 6.0 cooler soon.
Thanks,
Terry
Thanks,
Terry
New User
Joined: Dec 2011
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Thanks for the complements, I purchased it from the original owner, the truck has never been driven in the winter, it is all stock, it even had the original date coated firestone steeltex tires on the truck when I purchased it. The truck is in showroom condition, I also plan on storing it for the winter months as well. I plan on leaving it bone stock with the exception of adding a 6.0 tranny cooler.