Got all fluids changed and upgraded to all-synthetic: engine, front and rear diff, transfer case. All Amsoil, local dealer nearby. Previous maintenance records are missing so I only know a little about work based on some investigative work. I know I have a new timing belt. The front diff oil was very clean when it was drained today so that was done but I am glad to know everything is new as of today. I will do the transmission flush and fill at a local shop that knows Monteros and will use 100% Mitsu transmission fluid.