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Manual Tranny Gear Oil recommendations

Discussion in '1st Gen. Tacomas (1995-2004)' started by srsupertrap, Jan 11, 2010.

  1. Jan 11, 2010 at 8:29 PM
    #1
    srsupertrap

    srsupertrap [OP] Well-Known Member

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    Bilstein 5100s, Borla 14945 S/S Exhaust, Fram Air Hog Filter, Diff Breather Mod & NGK Wires
    Goinging to change out all the manual trans & Differential gear oil on my 2001 Tacoma TRD 4X4 which has 112K on it, not sure if it was ever done. The Service manual specifies the following grades & quantities

    Transmission: API GL-4 or GL-5 75W-90 (2.6 Quarts)
    Transfer Case: API GL-4 or GL-5 75W-90 (1.1 Quarts)
    Front Differential: Hypoid API GL-5 75W-90 (1.2 Quarts)
    Rear Differential: Hypoid API GL-5 80W-90 (3.2 Quarts)

    What do you guys recommend? Looks like I need 2 gallons so the synthetic route would be pretty expensive considering Mobil 75W-90 is about $10 quart.

    TIA
     
  2. Jan 14, 2010 at 5:50 PM
    #2
    genuitybits

    genuitybits Member

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    I went with For my 01 pre-runner, I drained the OEM (it came out looking like white milk--thicker than milk and along the same pour speed as a new bottle of motor oil) and used Red Line Synthetic Oil 50304 - Red Line MT-90 Transmission Gear Oil, 75W90 which his a GL-4. I would stay away from GL-5. I am not sure if there are any brass parts in the Taco tranny (like syncros), but GL-5 contains heavy (extreme pressure) additives that eat away at brass.

    I had the a problem where I heard like metal on metal when I shifted from 1 to 2...not quite so smooth shifting. I hated to shift into second since I could hear the crunch.

    I was not quite sure what it was, but after changing to the MT-90, I never had any more problems. It's been like 15k and I never felt it that crunch again.

    Summit Racing has it for $12.49 for one quart: http://www.summitracing.com/parts/RED-50304/

    I did not know of any local retailers so opted for online. I would not nickel and dime with fluids like this. Also, don't think you mean 2 gallons. 4 quarts equals 1 gallon. You only need 2.6 quarts. I only needed two quarts. It would be safe to buy either 3 or 4. Your Taco will thank you.
     
  3. Jan 14, 2010 at 9:37 PM
    #3
    pittim

    pittim mittip backwards

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  4. Jan 14, 2010 at 9:41 PM
    #4
    coldcanuk

    coldcanuk Well-Known Member

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  5. Jan 14, 2010 at 9:51 PM
    #5
    PnoyBOS5

    PnoyBOS5 Well-Known Member

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    i have never changed mine, can someone direct me to where the drain plug is located and what is the recommended fluid to use
     
  6. Jan 15, 2010 at 8:10 PM
    #6
    Ramphonic

    Ramphonic Well-Known Member

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  7. Jan 15, 2010 at 8:12 PM
    #7
    HondaGM

    HondaGM CallSign Monke

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  8. Jul 28, 2010 at 3:12 PM
    #8
    MadTaco461

    MadTaco461 BRO runner

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    How many miles should you go for a manual transmission oil change?
     
  9. Sep 11, 2015 at 1:46 PM
    #9
    quetzal

    quetzal Well-Known Member

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  10. Sep 11, 2015 at 6:25 PM
    #10
    bry838

    bry838 Well-Known Member

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    He's changing all fluids, not just tranny...
     
  11. Sep 11, 2015 at 6:29 PM
    #11
    bry838

    bry838 Well-Known Member

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    Recommended fluid has already been stated.

    The fill and drain plugs are thin headed 24mm(I think) bolts. Tranny drain is directly on the bottom and the fill is.....oh wait your second gen....this is first gen forum...
     
    Janko630 likes this.
  12. Sep 11, 2015 at 6:32 PM
    #12
    bry838

    bry838 Well-Known Member

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    So I use mt-90 in the tranny but was gunna go with a GL-5 for the transfer. Should I not and stick with GL-4? Is there brass in the transfer case.
     
  13. Sep 11, 2015 at 9:25 PM
    #13
    Fallguy6666

    Fallguy6666 Well-Known Member

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    Hes doing em all....so he needs just shy of 2 gallons....
     
  14. Jan 13, 2022 at 9:53 PM
    #14
    Tacomarino

    Tacomarino New Member

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    Changed oil to mt 90 mud tires re grounded whit bigger wire and
    I pit mt-90 on trany and both transfercases is that bad at all and id what to do any more change the oil to mt-90 did on all trany and trans cases and put new tubin alll in car changed batt wires to a thiler gage cuzz no gud cunductuvity and 3 point spark plugs found the shortage it had in the fuel injuctors re did the wires and did plastic tape liquidnon all electrical components so water dont mess whit the car wires and changed master cinlender whit the cylender and bleed it well and stiil no gêadr go i looks like it wants to shut own wen i try to put intoany gear and
     
  15. Jan 14, 2022 at 6:59 AM
    #15
    se7enine

    se7enine MCMLXXIX

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    Most manual trans guys will recommend Redline MT-90. It's expensive but it does a great job.
     
    cruxofthebisquit and Wulf like this.
  16. Jan 16, 2022 at 7:31 PM
    #16
    Tacomarino

    Tacomarino New Member

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    Changed oil to mt 90 mud tires re grounded whit bigger wire and
    Is it bad if I did all the transmission and gear boxes with the transfers all the same mt90 is it bad if all the same words are the same or they have to be different if so I will have to change them I'm about to do the transmission clutch replacement I'm actually going with an aftermarket stage 2 stage 3 clutch which is more toward more power to sense so I'll let you guys know how that works out my truck still doesn't go into gear so basically like I said I changed everything cylinder master cylinders starters because I had a shortage which was kind of my starter if anybody has a tortoise and your car will kill the starter all the time which the car won't start so did you guys know how to change my Sheraton turns out I went with that aftermarket clutch hopefully it right soon as I can put it on and I got all the utensils to take care of that myself a recommendation before take tranny off or mods that I should add while transmission is down
     
  17. Dec 19, 2023 at 10:00 AM
    #17
    khargis

    khargis New Member

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    Howdy y’all. This is my first 1st gen forum post, so thanks in advance. I have. A 2003 Tacoma 3.4L/manual with 238k on it. I live on the Oregon coast, so it doesn’t get that cold, but sometimes freezes. As of late, I have been needing to warm up my rig for about 10min before it will shift into gear. I’m going to start with the tranny fluid and looks like Redline MT 90 is the go to from what I have read. Is the GL 4 what I should use? If anyone has any other thoughts about maintenance I should do with this mileage, all will be appreciated!
    Otherwise, my rig is running great!
    Cheers, Kris
     
  18. Dec 26, 2023 at 1:25 PM
    #18
    scocar

    scocar hypotenoper

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    Yep, that's the way to go.

    PS make sure you have a pump with a tube that fits inside the fill holes. Suction gun should work well.

    Also do NOT drain until you verify you can open the fill plugs!
     

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