K1500 axle and transfer case oil question

I've got a 1998 K1500 with 100K and wanted to change the transfer case and both axles. I had planned on using Redline D4ATF for the transfer and 75W90 for the axles. The rear isn't a limited slip and I'm not doing any heavy duty off road excursions. Does anyone use Redline? Am I using the correct oils? Should I be using something else?

Thanks
Patrick

75w90 is the correct fluid to use for the diffs, i use royal purple, their both good oils i knw that redlines stuff is all red then, royal purples stuff is all purple heh