AgitatedPancake
Frobot
So I've been thinking about planetaries lately, and have some stuff to learn. Is there anything that makes the planetaries of a transfer case low range (like the ultra common 2.72:1 NP/NV set) different than the planetaries in a transmission from a duty cycle perspective?There's obviously a sheer size difference due to the amount of upstream reduction, but anything else? Is there any reason transfer case planetaries can't be run at 100% duty cycle with stock-like reliability, or would you toast the bronze bushings in the planets?
I know the TeraLow 4:1s had issues, and I think that led me to believe that transfer case planetaries in general were kinda "part time" from a duty cycle persepctive. But then in automatic transmissions, you've got planetaries engaged in any gear but 1:1. Are they fed pressurized oil into the bushings, or just splash lubricated? From the few google pics I've looked at, they almost seem just splash lubricated like the transfer case gears.
Turbo 400:
2.72:1 NP/NV transfer case planetaries
I know the TeraLow 4:1s had issues, and I think that led me to believe that transfer case planetaries in general were kinda "part time" from a duty cycle persepctive. But then in automatic transmissions, you've got planetaries engaged in any gear but 1:1. Are they fed pressurized oil into the bushings, or just splash lubricated? From the few google pics I've looked at, they almost seem just splash lubricated like the transfer case gears.
Turbo 400:
2.72:1 NP/NV transfer case planetaries