dot 3 only?

[9's]

Can I use dot 4 for clutch fluid?
And can it be synthetic?....or is straight dot3 the only to be used with no advantages going with a 'better' fluid

Have some issues with shifting and starting easy n cheap

 

[Wicked_Sludge]

dot 3 and dot 4 are basically interchangeable.

dont bother with synthetic. if your having shifting problems, something needs replaced...playing around with the fluid will only hide the problem temporarily at best.

 

[ghost_rader]

the only advantages are heat brakedown, the higher dot rating, the higher temps it can handle. but yes you can go up in number, but never go down.

 

[Simple_serf]

The slave isn't going to be exposed to the same type of heat that brakes are regularly exposed to, unless you have a really big problem. On these trucks you are ok as long as you keep the fluids full and clean. Dot 3 will be fine.