Fluid Change, transmission and Transfer Case, Grades/Viscosity

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What fluid should be used in the transmission and transfer case?

OE reccommends:

NV4500 Transmission: GL4 or SynTorque
NV241 HD Tranfer Case: Dextron II

What grade of Amsoils would be a good swap out? 75x90? Or some other? Same in both? Dextron II seems pretty light for the transfer case...

I did a search and didn't notice anyone mentioning the grade/viscosity... just "switched fluids to amsoils", etc

 

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Mark I am running AmsOil Ser 2000 75W-90 in my trans, front and rear ends and AmsOil ATF in the transfer case.

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EAT'M UP
97 2500 Club 4X4 3. 54, Forrest Green/Driftwood, LSD 5 speed, & Psychotty Air System, TST #11 all the way forward, AFC spring kit, Geno's Exhaust Blanket, TST EGT gauge & 0-60 boost gauge in A Pillar, Cat-be-gone, 4" Dynomax Bullet muffler, Crome 4" turn down, AmsOil Through out, Geno's trans filter kit, AmsOil Bypass system, Lund Winter front, Leer Cab Level Shell Driftwood , 255/85R16 Big O ATs, Dyno'd 342 HP *NRA/USPSA member and proud of it*

 

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Hey Mark, I would run Amsoil Series 2000 75W-90 in the front differential and Series 2000 75W-140 in the rear differential (if you load your Ram up... 75W-90 if you don't). As for the transfer case, Amsoil ATF+4 (or regular Amsoil ATF) will work very well, so will Red Line D4 ATF or ATF+3. All lubes listed above are synthetic. I currently have Red Line 75W-90 synthetic gear oil in both differentials... before that I had their 75W-140 synthetic gear lube in my rear differential. I experienced ABSOLUTELY NO mileage penalty by using the 75W-140. I will be switching to the Amsoil Series 2000 75W-90 in the front/Series 2000 75W-140 in the rear at my next change interval. Hope this helps Mark. #ad


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'98. 5 2500 QC 4x4 Sport, Glasstite Vision II, 285 BFG A/Ts on M/T Challengers, Warn 4X Boards, Mopar fender flares & tow hooks, NW Custom s/s-rubber mud flaps, Mag-Hytec diff. cover & trans. pan, Edelbrock IAS shocks, Reese Titan V hitch, VDO Vision gauges, Dynamat, '00 Sport grille & valve cover, '00 Sport headlights/PIAA Super White bulbs, PIAA Dual Sport 900 aux. lights, BD exh. brake and TorqLoc, Prime-Loc, Amsoil Dual Bypass, Optima yellow tops, Bosch 275s, VA CPC, (censored), Banks 14 cm2 turbine housing/Big Head wastegate actuator, ATS 3-piece exh. man. , Banks 4" dia. s/s exh. sys. , BD V10/Cummins hybrid TC & valve body, BD trans. front pump & PressureLoc, Air Bulldog induction hood (with NACA ducts), plus MANY other trick modifications

 

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As far as Amsoil ATF in the transfer case, at 35,000 mine looked like new. I may pull a sample next time to see how it compares to new fluid.

Gene

 

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Hey Guys! You, running the GL-5 in your trans!
DON'T!
There is a reason, something about the sulfer level in the lube being too high with GL-5. Do a search and/or check (of all things) the Register.
Check my sig for Lube recomendations. #ad


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'94 3500 4x4, 201,000 miles, Auto w/shift kit (currently under remodification), 3. 54 Gears, TST #5 plate, 235-85-16s, Rancho 9000s w/remote, Isspro gauges inplace of cupholder & Amsoil Bumper to Bumper. NRA member.

 

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Not a problem with the the Amsoil 2000 75w-90. Different chemistry. Call them. 715-392-7101

Gene