ok i know this is a repeat but i need to know quick so i can get back in the dirt. the other day i was bashing at these really great dirt piles. and messed up going off about a 5 foot jump.anyway the darn thing landed right on its lid, twice. so then i notice that my trucks spinning out when i just bearly touch the gas. so then upon further inspection i see the front wheels arent spinning. so i decide i need to do some more in-depth inspection at home in my garage. so i pack up and head home. today i took apart the front end a noticed that inside the diff on the right side i had broke the little pinion coupler pin and there for it wasnt engaging the right drive line when the center driveline spun the front diff. so i now need a new pin, and also decide that while i have it apart this would be a good time to change the fluids in the diffs. anyway my question is whats a good combo for the diff. fluids,front, middle, rear, i have 5,7,2 in my 8ight but thought i might need to go w/ a heavier weight for my monster truck. so thats it. any info. will be serously considered and appreciated. thanx, clay unruh