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Thread: '94 5 speed trans fluid recommendation

  1. #1
    Join Date
    Dec 2006
    Location
    Springfield, IL
    Posts
    9

    Default '94 5 speed trans fluid recommendation

    Now that my PMD is fixed, gonna start servicing the beast. Aside from the high dollar GM synchromesh fluid, is there a good alternative to this that I can put in my dually 5 speed with the granny low? On my '92 truck with a V6 and 5 speed, this was the only stuff that would work and shift well. I tried auto trans fluid, Mobil 1 oil, gear oil, etc. I think this trans in my diesel holds a lot and looking to lessen the expense if possible.

  2. #2
    Join Date
    Dec 2006
    Location
    NE Texas
    Posts
    270

    Default

    When I had my NV5000 overhauled several years ago I was told the synchronizers were nylon and would not hold up w/o the GM fluid. I had some synthetic fluid we used in our OTR truck but the numbers didn't quite match up. I bit the bullet and got the GM fluid to preserve the warranty. On something like the tranny that is going to take quite a bit of abuse, I'd think it would be cheaper in the long run not to skimp on the fluid.
    Good...Cheap....Fast.... you can have any two.
    '97 CC K3500 dually. Turbomaster (NO VAC PUMP);SSD Intake;3"downpipe;4"exhaust;SSD PMD;Class V Receiver hitch; Folding GN ball;air bag helpers on rear

  3. #3
    Join Date
    Dec 2006
    Location
    the left side of massachusetts
    Posts
    70

    Default

    I use AMSOIL for all my fluids in the truck and I am very happy with my choice.

    http://www.amsoil.com/StoreFront/mtg.aspx
    Dan,
    1996 K2500 6.5TD, 4" stainless steel exhaust, stock injectors, AFE cold air intake, FSD Heat-Sync and #7 resistor, Turbo-Master waste gate controler, Heath ECM, Autometer Sportcomp II EGT and Boost gauges, 15PSI Max. Boost

  4. #4
    Join Date
    Sep 2007
    Location
    woodstock, CT
    Posts
    31

    Default tranny fluid

    I still like royal purple fluids- theyre expensive around 11 bucks a quart but you get really smooth shifts plus it has the additive in it that the tranny requires
    1993 GMC 2500 4x4 Reg. cab long bed
    NV 4500
    NP241
    265/75/16- Goodyear Wrangler ATS
    3" downpipe, 4"exhaust
    K&N Intake
    Homemade Headache Rack
    Homemade front light bar
    Solid flywheel conversion. W/ LUK clutch
    CB

    Coming Soon ( Maybe?)
    Marine injecters, Tach, EGT/Boost gages, 4x4 Posilock, Solid axle swap ( kinda cancels out the posilock but its wishfull thinking), Air locker in 14 bolt rear, W/ auxillery air tank.

  5. #5
    Join Date
    Jan 2007
    Location
    Golden Colorado
    Posts
    35

    Default

    i agree with the royal purple, that is what i put in my nv4500, afer it was rebuilt, i love it it shifts smooth, and i have royal purple in evey other gear box too, also if you spend the money now you will not have to change it for a long time so just a thought
    94 k3500 crew cab, marine inj, home made wastegate controller, 4inch, perf. air intake, 80hp chip, gauges, 5speed, pmd cooler with #9.

  6. #6
    Join Date
    May 2007
    Location
    Florida
    Posts
    107

    Default

    The the tranny fluid is a special lube to take the pounding the diesel engine hammers through the drivetrain. It helps obsorb the impact of the high torq low rpm pulses this engine dishes out. My Manual recomends the GM or Castrol product. I have never seen the exact Castrol product on the shelf. My friend with the same tranny in his Dodge could only find it at his Dodge Dealer. I like other brand product (I used to sell Royal Purple products, good stuff), but in this application, personally, I would only use what the manual says.
    Craig

    1994 2500 Ext Cab Long bed 4x4. F code. 165k. NV4500 - - 3.42 gears (originally 4.10). 17" H-2 wheels (265/70/17 Michelins), Remote FSD , K&N, Chip, Down pipe (3" tapering to 31/2"), no cat., 4" exhaust w/flow though muffler. New in July 2007: engine (6.2 block), ARP head studs, ceramic coated pistons, H1 oil pump, stock cam, 21:1 compression...), Lift pump, filters, lines, hoses... Non EGR Intake, Mechanical Boost Master (12psi), deleted vacuum pump, Boost and EGT gauges.

  7. #7
    Join Date
    Apr 2007
    Location
    Texas
    Posts
    22

    Default 5 speed trans fluid recommendation

    Try AMSOIL. NV3500 is amsoil part # MTFQT and it is 6.60 a qt, and the NV4500 is amsoil part # MTGQT for $9.90 a qt
    www.syntheticoils.us

    Jeff

  8. #8
    Join Date
    Dec 2006
    Location
    Florida, Palm Beach County
    Posts
    443

    Default

    I think royal purple is the best choice also. Amsoil & Redline also make very good synthetic trans. oils also but royal purple in my area is the easiest to find. But any one of these brands will work just fine.

  9. #9
    Join Date
    Mar 2007
    Location
    NW Kansas
    Posts
    117

    Default

    On PTO Cover, there should be a decal listing GM and Dodge oil part numbers. We have a Chevy/ Dodge dealer close by, and they only carry the Dodge oil @ $15/qt. don't carry the GM oil because it's about $22/qt and is the same stuff.

    We personally use Royal Purple. On Royal Purple Web site, there is a comparison chart. GM PN 12346190 is equivalent to Royal Purple Max-Gear 75w90.

    On your V-6 5spd 1500, the fluid is thinner, the Royal Purple equivalent is Sychromax
    Last edited by GM Guy; 11-24-2007 at 10:18 PM.
    99 Chev C3500 6.5L NV4500 14 bolt 2wd 4.10 130K
    96 GMC C2500HD 6.5L NV4500 14 bolt 2wd 3.73 240K
    95 GMC C2500HD 6.5L NV4500 14 bolt 2wd 4.10 135K
    95 Chev C3500HD 6.5L NV4500 D80 2wd 5.13 132K
    94 GMC C2500HD Burb 6.5L 4L80E 14 bolt 2wd 3.73 300K
    91 GMC C1500, 6.2L SM465 10 bolt 2wd 3.42 59K
    91 Chev C1500 4.3L 5LM60 10 bolt 2wd 3.42 ??K

    See other forum for complete signature

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