Hi,

I have a 1991 Westfalia with the stock 2.1 and 4 speed manual
transmisison.  I live in Canada, though don't drive my van in the
winter.  I don't generally drive it much below freezing.

I have noticed a very slight whine coming from my drivetrain after
extended (3-4 hours) of driving.

I don't have any maintenance records indicating the transmission fluid
has been changed and I'm coming up on 300,000 km.

I've got a 2 week road trip soon & I would like to change the
tranmission fluid prior to that trip.

What are the recommendations for new transmission fluid?

I know about removing the "filler" plug before the drain to make sure
you can get fluid back into it.  Other than that, I know nothing about
replacing the transmission fluid.

I do most of the work on my van myself & generally don't have too many
problems.

Thanks for any advise!

Cheers,
Steve W.