cant do anything at the house (condo board crap) and really, 100 bucks to get it done by someone else... also... its -20 outside... i dont feel like getting under my truck with the snow and high winds.

I'm with you.

So, how's it shifting?

haha no joke you guys are for real?  so if am losing speed on a hill coastin its probably my tranny and t-case fluid?  haha i was wondering why its so bad, correct me if im wrong is that the case?  i live in washington and go boardin 4 times a week, the hills are 6% grade and thats pretty steep and i lose speed in nutral and have to actually give it gas in 5th. lol so if i change my oil it will correct this?

shifts great now...

also, wind resistance is a big factor on coasting with these trucks...

This is why I have only changed these fluids in the spring/summer. I would stick with the 75wx80 and GL4...just because YOU KNOW these will work for sure, GL5 is what is questionable...So stick with the 75wx80 and GL4

And since its been awhile since you last changed it, of course your old oil was thinner than this newer stuff becuase the viscosity of the oil has broken down over the length of time. So this newer stuff, especially when cold, is gonna be really thick and seem totally different. I have always changed my fluids in the spring/summer because that gives the oil 4-5 months before winter hits to help break it down more.