What are the fluid capacities and service intervals for:
1. Front Differential-MIL GL5 Hypoid 85/90
2. Rear Differential-MB 0019891703
3. Transfer Case-Dexron III
for a 92 300 TE 4Matic. It only has 33,000 original miles on it yet the fluids are probably original. Time to change the fluids? How much of each?