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Transfer Case oil type

Discussion in 'GM Powertrain' started by nos351wcm, May 30, 2010.

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  1. nos351wcm

    nos351wcm New Member

    Hey hope all is well with everyone.
    Im getting ready to change the oil in my transfer case and front diff. i changed the rear diff fluid with 75-90W gear oil.
    What oil type should i use in the front diff?
    Transfer Case?

    any ideas or suggestions would be great
    thanks guys.
    Dan from NJ
  2. Vinniety

    Vinniety New Member

    If you go to amsoil.com and put in your vehicle information they will tell you what you need. I have done it for years and they always have been right. Of course i comp[are it to other sites or the manual.

    Tried to get your vehicle info from your signature so not sure if this is the truck you need the info for.

    2000 CHEVROLET TRUCKS SILVERADO 1500 PICKUP 5.3L 8-cyl Engine Code [T] [​IMG] LUBRICANTS & FLUIDS: Lookup Another Vehicle </I>Engine Oil
    Grade 1......API*
    Signature Series 0W-30 100% Synthetic Motor Oil (SSOQT)
    SAE 5W-30 Synthetic Motor Oil (ASLQT)
    XL 5W-30 Synthetic Motor Oil (XLFQT)
    Above 0F......10W-30
    All TEMPS......5W-30 [1]
    Manual Transmission,NV4500......GL-4 [2]
    Synthetic Manual Transmission and Transaxle Gear Lube (75W-90) API GL-4 (MTGQT)
    Manual Transmission,NV3500......GLS [3]
    Synthetic Synchromesh Transmission Fluid (5W-30) (MTFQT)
    Automatic Transmission,4L60-E......AF6
    Synthetic Universal Automatic Transmission Fluid (ATFQT)
    Low Viscosity Synthetic ATF (ATLQT)
    Torque-Drive Synthetic Transmission Fluid (ATD1G)
    Standard Differential, Rear GMT 800......GL-5
    All TEMPS......75W-90 [4] [5]
    SEVERE GEAR 75W-90 Synthetic EP Lubricant (SVGQT)
    75W-90 Synthetic Long Life Gear Lube (FGRQT)
    SAE 80W-90 Synthetic Gear Lube (AGLQT)
    Differential, Front Selectable 4WD......GL-5
    All TEMPS......80W-90 [6]
    SAE 80W-90 Synthetic Gear Lube (AGLQT)
    SEVERE GEAR 75W-90 Synthetic EP Lubricant (SVGQT)
    75W-90 Synthetic Long Life Gear Lube (FGRQT)
    SEVERE GEAR 75W-110 Synthetic EP Lubricant (SVTQT)
    Limited Slip Differential, Rear GMT 400......GL-5*
    All TEMPS......80W-90 [6]
    SAE 80W-90 Synthetic Gear Lube (AGLQT)
    SEVERE GEAR 75W-90 Synthetic EP Lubricant (SVGQT)
    75W-90 Synthetic Long Life Gear Lube (FGRQT)
    SEVERE GEAR 75W-110 Synthetic EP Lubricant (SVTQT)
    Standard Differential, Rear GMT 400......GL-5
    All TEMPS......80W-90 [6]
    SAE 80W-90 Synthetic Gear Lube (AGLQT)
    SEVERE GEAR 75W-90 Synthetic EP Lubricant (SVGQT)
    75W-90 Synthetic Long Life Gear Lube (FGRQT)
    SEVERE GEAR 75W-110 Synthetic EP Lubricant (SVTQT)
    Differential, Front......GL-5
    All TEMPS......80W-90 [7]
    SAE 80W-90 Synthetic Gear Lube (AGLQT)
    SEVERE GEAR 75W-90 Synthetic EP Lubricant (SVGQT)
    75W-90 Synthetic Long Life Gear Lube (FGRQT)
    SEVERE GEAR 75W-110 Synthetic EP Lubricant (SVTQT)
    Transfer Case,Automatic......SLF [8]
    No AMSOIL Product Recommendation
    Transfer Case,Manual......GLS [9]
    Torque-Drive Synthetic Transmission Fluid (ATD1G)
    Synthetic Universal Automatic Transmission Fluid (ATFQT)
    Fluids
    Power Steering Fluid......PS
    Power Steering Fluid (PSFCN)
    Brake Fluid......HB
    AMSOIL Brake Fluid DOT-3 (BF3SN)
    Clutch Fluid......HB
    AMSOIL Brake Fluid DOT-3 (BF3SN)
    [1] SAE 5W-30 is preferred.
    [2] Synthetic gear oil, GM part no. 12346190 or equivalent.
    [3] GM part no. 12345349 or equivalent.
    [4] GM specification 9986115.
    Synthetic lubricant, GM part no. 12378261,
    or equivalent product formulated to meet
    [5] Do not use limited slip additive.
    [6] Manufacturer recommends GM part no. 1052271 or equivalent
    [7] may be used in front differential.
    In cold climates when excessive shift effort is required to
    shift into 4WD GM part no. 12345836 or equivalent
    [8] GM part no. 12378508 (U.S.), 10953626 (CAN)
    [9] GM recommends Part No. 88861800 (Canada 88861801)
    or equivalent for manual transmission, transfer
    case applications.

    [​IMG] CAPACITIES: Engine, with filter..........6.1 quarts [1]
    Cooling System, With AT Initial Fill..........13.5 quarts
    AMSOIL Antifreeze and Engine Coolant
    Cooling System, With AT & Optional AC Initial Fill..........14.9 quarts
    AMSOIL Antifreeze and Engine Coolant
    Automatic Transmission, 4L60-E Initial Fill..........5 quarts
    Automatic Transmission, Total Fill
    4 speed 4L60-E..........11.3 quarts
    Manual Transmission, NV3500 (SEC)..........4.3 pints [2]
    Manual Transmission, NV4500 (TOPC)..........7.9 pints
    Differential, Front..........3.6 pints
    Differential, With 10.5 RingGear Amer Rear..........6.4 pints
    Differential, With 11 RingGear Dana Rear..........8.5 pints
    Differential, With 8.5 RingGear Amer Rear..........4.3 pints
    Differential, With 8.6 RingGear Amer Rear..........4.3 pints
    Differential, With 9.5 RingGear Amer Rear..........5.5 pints
    Transfer Case, NVG 149..........4.9 pints
    Transfer Case, NVG 261/263..........4.1 pints
    Transfer Case, BW1370/4401..........3.2 pints
    Transfer Case, NVG 236/246..........4.1 pints
    [1] After refill check oil level.
    [2] Approximate, fill to level of fill plug.
  3. nos351wcm

    nos351wcm New Member

    Hey bud i appreciate the info and effort. many thank yous
    -Dan from NJ
  4. ippielb

    ippielb New Member 1000 Posts 100 Posts

    Dextron Auto Tranmission Fluid in anything newer then 85 for the transfer case.
  5. Vinniety

    Vinniety New Member

    Ippie - I think you need to make sure about that. I have a 2002 tahoe and tranny fluid was NOT the correct fluid to use in my NVG 246 transfer case.
  6. MrShorty

    MrShorty Moderator 1000 Posts 100 Posts

    This is correct. Most t-cases can use regular ATF. If you have the NV246 (Autotrac), then you need the blue AT-2 fluid (which, last I heard, is still only available through the dealership). We need an accurate ID of your transfer case.
  7. jtjtbaker

    jtjtbaker New Member

    How do you ID your transfer case??
  8. jmcover

    jmcover New Member

    If you have the NP8 RPO code you may have the NVG 246. Mine takes the GM AT2 (blue fluid) GM/AC Delco Auto-Trak II
    (#12378508)

    RPO NP8 Transfer Case Description and Operation
    General Operation
    The New Venture Gear model NVG 246 RPO NP8 transfer case is a two speed automatic, active, transfer case. The NVG 246 transfer case has many changes from prior years. The NVG 246 is now classified as an Electronic Architect Upgrade (EAU). The upgrades to the NVG 246 EAU include some of the following internal changes...
    http://www.pacificp.com/forum/viewtopic.php?p=106741&sid=11eac8d2a50a4ed8b6e72ebc81c2eacb

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