I use a funnel.
The same type in the picture that is being used to direct the old AFT from the trans cooler.
The end is small enough to fit in the dip stick tube, and the filler end is tall enough to pour without making a mess.


'02 Montero: OME suspension, ARB front bumper, homemade skid plates & spare tire Blitz can mount, extended diff. breather, K&N air filter, Optima Yellow Top, BajaRack, IPF lights, Goodyear Duratrac 265/75/16's, RUD 4x4 Grip chains