type f instead of mercon need input?

[jsnap]

Has anyone had experience using type f instead of mercon to eliminate those friction inhibitors that cause heat me myself i dont mind a harsh shift please let me knowyour thoughts on this

 

[swampdigger]

I've never heard of using type F to reduce heat, but I've heard if you toss a quart or two of it in a Mercon tranny, it'll giver firmer shifts. I wouldn't recommend entirely filling up with type F though.

 

[Mr_Roboto]

I've run an E4OD on 100% Type F with no issues.

 

[sle2115]

Used to run our GM trannys with it, TH350 and TH400, and they were never designed for type F. Many shift kits recommended it, so I used it with no bad results other than harsh shifts. I feel like I am in a confesional, saying I used anything designed for a ferd in my GM!!!

 

[Diesel JD]

Scott I noticed the same thing when I got my BCM tranny shift kit. I wonder why the shift kits say use the Type F? I believe the C6 would have been designed for it though...my kit also says absolutely do not use Dexron/Mercon which also has me asking "why"?

 

[Mr_Roboto]

Nearly all trans fluids besides Type F use "friction modifiers" (originally whale oil, now synthetic) which causes the clutches to slip more during engagement.

The thing I don't like about the newer fluids is that they are made thinner for better fuel economy. Just as my old Mustang II wouldn't like 0w20, the old C3 probably wouldn't like modern trans fluids.

 

[Cheaper Jeeper]

HMMMMN, interesting. I've been using Mercon in my C6 - is this a bad thing?

Oddly enough I came across two unopened quarts of Type FA on the shelf in one of my sheds the other day and was wondering if it would be OK to use in my truck. Guess the answer is yes......

 

[swampdigger]

I've run an E4OD on 100% Type F with no issues.

Interesting!

 

[sle2115]

Scott I noticed the same thing when I got my BCM tranny shift kit. I wonder why the shift kits say use the Type F? I believe the C6 would have been designed for it though...my kit also says absolutely do not use Dexron/Mercon which also has me asking "why"?

Type F is slightly thicker, causing a little higher hydraulic pressure and better, firmer shifts - which is desirable for performance and longer clutch/band life.

 

[adrianspeeder]

Mercon does not have friction modifiers, so it's fine fer the C6/E4OD/4R100. Mercon V was created with the friction modifiers for the 4R70w/4R75e.

Adrianspeeder

 

[Mr_Roboto]

Mercon (sold as Dexron / Mercon) does indeed have friction modifiers, Ford came up with the spec to make their transmissions shift softer like GM's had had for years.

http://www.valvoline.com/pages/products/product_detail.asp?product=6

I'm going to have to take back what I said earlier about Type F beign thicker. The viscosity of Dexron III / Mercon is 7.9 / 37, the viscosity of Type F is 7.3 / 36. Basically the same.

 

[87crewdually]

It's interesting this comes up. I'm in the process of overhauling/enhancing my C6 and I'm using type F for assembly. Guess we'll see how it likes it!
I think with new wide kevlar band and Alto red clutches it will be fine.