Shocks and gear differentials are two items on your vehicle that typically require the most maintenance. Changing fluids to cope with track conditions or just to freshen things up requires a tear down and refill with a quality fluid.
Team Associated has expanded their line of silicone diff fluids by adding additional viscosities. These include 4K, 6K, 15K, 80K, 200K, 500K and 1M! I’m not entirely sure what you’d use 1M for (maybe an 1/8 Monster Truck, or 1/5 scale), but it’s now there it you need it.
These fluids have been laboratory tested and made exclusively in the USA by Lucas Oil Products, Inc.
#5444 Silicone Diff Fluid, 4000cSt
#5446 Silicone Diff Fluid, 6000cSt
#5447 Silicone Diff Fluid, 15,000cSt
#5448 Silicone Diff Fluid, 80,000cSt
#5461 Silicone Diff Fluid, 200,000cSt
#5463 Silicone Diff Fluid, 500,000cSt
#5465 Silicone Diff Fluid, 1,000,000cSt
[source: www.teamassociated.com]