Transmission help
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5th Wheeling
Joined: Oct 2022
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From: I-55@I-12
Transmission help
While cruising the backroads this evening I ran afoul of a loose O-clamp which incidentally blew out every bit of fluid until I lost gears.
My 76 F100 is a bit of a Frankenford with a 77 460, where it originally had a 360. It’s unknown if the same transmission was kept or replaced along with the engine. From what I’ve read, 76 used F type and 77 used Dex/Mercon.
Is there any definitive way to determine my transmission year or type of fluid. Or recommendations…….
Thank you in advance!
My 76 F100 is a bit of a Frankenford with a 77 460, where it originally had a 360. It’s unknown if the same transmission was kept or replaced along with the engine. From what I’ve read, 76 used F type and 77 used Dex/Mercon.
Is there any definitive way to determine my transmission year or type of fluid. Or recommendations…….
Thank you in advance!
Frmr Ford Trans Engr
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From: SE Florida
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From: The Shenandoah Valley
I know that by now it's long been super-ceded by other fluids ... more than once. DEX III/MERC is the current one to use ... and I have a dozen or so quarts on hand ... but I have read to avoid use of Mercon LV or SP in it.
If rebuilding one, even an older type F one, I've been told that more modern fluid can be used as all new friction and seals are in place then. Mine's stick calls for ESP-M2C138-CJ fluid too.
From here:: Martin Lubricants Technical Service Bulletin – Transmission Fluid Guide
Multi-Purpose Automatic Transmission Fluid: Unimark Multi-Purpose D-III/M ATF
Most lubricant manufacturers use this generic term for their automatic transmission fluid which meets the former General Motors Dexron III and Ford Mercon specifications which are no longer licensable by GM and Ford respectively.
Most lubricant manufacturers use this generic term for their automatic transmission fluid which meets the former General Motors Dexron III and Ford Mercon specifications which are no longer licensable by GM and Ford respectively.
- Dexron II: General Motors Dexron II was developed in the 1970s to replace GM Dexron for TorqueFlite transmissions to provide better viscosity control and additional oxidation inhibitors. There were some early-90s variants of Dexron II called Dexron II-D and Dexron II-E.
- Dexron IIE: First General Motors requirements fluid for electronic transmissions.
- Mercon Type CJ: This is a specialty transmission fluid for Ford C-6 transmissions. It is designed similar to General Motors Dexron II specification. This type of drive train fluid should not be used in automatics that require Type F. It can be replaced with Mercon or Mercon V specification.
- Mercon Type H: An obsoleted Ford specification that differs from both General Motors Dexron and Ford Type F transmission fluids. It can be replaced by Mercon or Mercon V specification.
- Ford Mercon: Ford fluid introduced in 1987, very similar to Dexron II. As of July 1, 2007, the production and licensing of Mercon ATF by Ford ends.
- Dexron III (H): Replaced General Motor Dexron II released in 2003 for use in Torque Flite transmission. This specification required improved oxidation and corrosion control in GM electronic automatics.
- Dexron III/Saturn: A special fluid specification for Saturn aluminum differential cases transmissions.
- C-4 Torque Fluid: Commercial designation by Allison Division of GM for the heavy and medium duty automatic transmission fluids. Based on Allison specification TES-389 in 1991; Allison Transmission implemented one of the first approval system for particular brands. Allison Division no longer supports this specification. General Motors Dexron III or Ford Mercon fluids sold today qualify to the specification requirements.
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I used to save them from other cars and put sometimes three in my police car's pans. I have a few still in a drawer. That was to mess with guys who buy them at auction. Like a note in a small bottle once. 
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