Engine/Transmission (1998.5 - 2002) Fluid Types

[johnharris]

I have been reading past topics on fluid changes. I have a 2002 and would like to know what fluids to put in the transfer case and the front and rear differentials. I'm reading Amsoil is the best.

 

[TomGolden]

Well, since you did mention Amsoil, I will tell you what I used in my 2001 4x4. I am not pushing anything on anyone, this is purely information as to what fluids I have personally used in my truck. I can't say Amsoil is the best, since I have never used any other non-OEM fluids, so I can not compare. As far as synthetics go, other TDR members have reported using Royal Purple and Red Line brands as well. Lubrication Engineers I believe are either blended or pure conventional lubricants, although they might also have 100% synthetics as well.



Engine: Amsoil Series 2000 15W-40 Heavy Duty Diesel & Marine

Both differentials: Amsoil 75W-90 gear lube

NV5600 6 speed transmission: Amsoil Series 3000 5W-30 engine oil

Transfer case: Amsoil ATF



All my lubricants are 100% synthetic.



I have been running synthetics in all of the above areas for at least 30K miles. I have changed out the various fluids at appropriate intervals, what I meant was that I made the switch over from conventional lubricants to synthetics at least 30K miles ago in every case. In the diffs and transfer case, I switched maybe 50K miles ago.