What ATF are you running in your 6sp manual / T-case

[Mudbug63]

What are you all running for ATF in your 6spds?

None of the local parts houses have a straight Mercon or Mercon V fluid only "all types" generic stuff. Most are marked DexronIII/Mercon(V) and some dont even get that specific. The manual specs Mercon only and not to use Multi type fluid.

I'm kinda at a loss the fluid obviously needs to be changed looking at it but I dont want to use the wrong type....Last manual I had used 80W90 which was a no brainer.

Your input would be most appreciated.

[SCUFFY828]

regular mercon or mercon 5 either one will work fine , doesnt matter, heck you can put gear oil in it if you want to , just might shift stiff when cold , the main thing is that is is full

[Mudbug63]

Originally Posted by SCUFFY828

regular mercon or mercon 5 either one will work fine , doesnt matter, heck you can put gear oil in it if you want to , just might shift stiff when cold , the main thing is that is is full

That is a interesting thought. ATF seems to be pretty thin stuff.....Would something like 75-90W GL-4/5 really be ok? I would think the wear would be less with a heavier oil.

[SCUFFY828]

gear oil isnt necesary , my point was that it doesnt make that big a difference , as far as lasting longer , maybe/ maybe not , if i did run gear oil, i would definitly run a thinner viscosity , like 75/w90