Join Date: May 2006
Location: Mouth of the Rat
For certain fluids that may meet the requirments, which I have no doubt of, I still will go with an OEM fluid if the price is not proohibitive, in DC's case read friggin stupid... But yes lot's of fluids will meet the needs for many apps, I see no reason to stray when DC is the one tha put in all the research, heck, DC soesn't make the fluid someone else does it for them..
As for one thing, when DC does put out a TSB or the like saying that a given fluid is
NOT applicable, as in do NOT use ATF anymore, I like to err on the safe side..
On another note sometimes it goes the other way, like the fact that ATF 4 now goes in almost every tcase, well that just make it easier to carry less crap..
As for the gear oil, someone recently pointed out that almost everything points to the Diffs using 75-140 in both, no matter what, syn in the rear if you tow, although oddly I am finding it hard to locate anything but syn in that weight around here.. However, I have seen that the front recomended is 80-90 in a few places and always assumed that was the correct fluid, guess it doesn't matter..
IF you use the 80-90 in both, no real harm will come of it, down here we change our fluids so often, monthly most times, that we just use what is in the bulk barrels, 80-90w usually... I personally use 80-140w but it makes very little diffeence. If your rig is mostly street the shockload difference and weights, will not matter that much.. old schoolers will laugh at people that bug out over the difference, these guys will put it in there without a thought, and 99% of the time nothing will go wrong.. I am picky and like 75-140 in a syn. but it isn't worth it $$ wise to change out syn every wet wheeling trip.
2000 WJ 5.2 V8
2011 WK2 V6