Well 1411506 (in the future, we will all be called by numbers instead of names, ol' 1411506 is just ahead of the game), do you mean fluid for the pumpkin? If so, I'm thinkin' a 90 weight gear oil would be good. Change it like you're changing oil on your engine. You could clean the little bits of crud in there while you've got the cover off.
And is this a manual tranny you're talkin' about? If so, pretty much the same applies. Although there are differing opinions on what weight to use and hopefully those folks will chime in. I used 90 in my 4 speed 'til I yanked it and replaced with T5 which uses ATF.
-101869 (my name in the future)


Tradin' up dimes for nickels...
'`'`'`'`'`'`
My \'65 Chevy C-20