time to change some fluids, need some advice
 

im coming up on an oil change and when i do that i need to go ahead and chane a few other things.

what brand of oil/weight should i use and how much for each of these items?
also any kind of additives?

1. front diff

2. rear diff

3. nv5600

4. transfer case

also on the diff's do i just remove the cover, let drain, replace gasket and fill back up? truck has 90k miles any other recomendations? thanks for your replys.

I'm doing the same thing to my rig, here's what I am using.
NV5600: 4 quarts/1 gallon of Amsoil MTF synthetic synchrommesh
Axles: 11.5 quarts of Pennzoil GL5 75W140 synthetic (2 gallons with the stock diff covers, aprox. 4 quarts in the rear, 3.75 quarts in front, clean and reuse gasket as long as it's in good shape); torque diff cover bolts to 16-20 lb/ft. I recently installed a Mag-Hytec rear diff cover and really like it, changing the differential fluid is much easier, no more removing the diff cover and it holds a lot more fluid.
Transfer case: I believe it's about 4 quarts, I have yet to get to the T-case fluid, I baught a case of Amalie ATF +4 Synthetic.

thanks for your reply. i have read some post about an extra qt. in the transmission (added thru the shift tower). have you already included this iun your 4 qt. measurment?

I bought 8qts for the front/rear diffs, still have half a qt leftover.
I did the 1/4"-1/2" below the fillhole, as recommended..
I used Valvoline 75w90?(ill double check) non syn

3qts for the transfer case(I actually used a hair more, filled till it came out)
ATF +4

For the nv5600, cant really help much there, but in my old nv4500 I used 1gallon of Syntorq, got it from standard trans in Ft Worth...

4 quarts is to fill the NV5600 up to the factory specified level. I've also heard about running more fluid in the tranny, but my truck shifts fine as is so I'm going to go with the factory fluid level.

I'm running about 6 quarts of Amsoil's MTF in mine, filled through the top PTO cover bolt hole.

MikeyB

i recently bought some trans oil from the dodge dealer and they sold me mopar trans oil it says nv3500 is it the right stuff? and does it matter mcuh if i run somthing differnt like the ams oil ?

i dont know i jsut ordered some amsoil form a guy at work. its going to be like 180 or so for the trans, transfer case, front and rear diff. it a little pricy i think but some ppl say its worth it

Why non-synthetic for the Axles? I thought the AAM asxles required synthetic.

Yes, the NV3500 and NV5600 share the same oil.
Big difference between the factory fill and Amsoil MTF is that the MTF is synthetic. And by overfilling the tranny by 1-2 quarts provides plenty of lubrication to the upper bearings.

MikeyB

if it were me, id swap it all out for amsoil. ill eventually get around to doing so on the truck.

My bad, I meant "syn", GL-5...[redface]
Not sure why I tossed the non on there...