[jtharvey]

I've got a friend with an '08 and a manual who is wanting to change his trans fluid. The owner's manual only lists Motorcraft Manual Transmission Fluid for use in the trans, but he wants to go with a higher quality fluid. What is the spec for type of fluid for the manuals in these trucks?

 

[CCDC]

Hay not bad it fallows the heading. I was wondering that myself but had no responce. I wonder get it analized by one of the sampling places? Maybe they could tell what it is.

 

[jtharvey]

From everything I've been able to find the fluid is simply ATF. I've been told the ZF-6 manual in the '08 specs the same fluid as the ZF-6 transmissions in earlier models of trucks. The earlier models use ATF in the manual transmissions, which suprises me that they use something so thin, but that's what Ford specs.

 

[mattymx]

Most likely it will spec synthetic ATF.

 

[CLR95]

Full synthetic is what they take. So any full synthetic ATF should work.

 

[Cat_Rebel]

Not to derail but aren't the manuals de-tuned from the factory? How well does the 6.4L run with a 6sp stick?

 

[jtharvey]

I couldn't tell you that. The only '08 I've driven was a CC 4x4 F-450 Dually with an auto, and it felt like a dog...especially when I had just gotten out of my truck.

 

[gregrob]

50wt synthetic gear oil is good for them too. Holds up much better than ATF