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1999 Tacoma 2.7L 4x4 Manual Tranny and Diff Fluid Change

Discussion in '1st Gen. Tacomas (1995-2004)' started by 99luftacoms, Apr 22, 2021.

  1. Apr 22, 2021 at 8:13 AM
    #1
    99luftacoms

    99luftacoms [OP] New Member

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    First Name:
    Edward
    Vehicle:
    1999 Tacoma 4x4
    Stock...for now.
    I'm sure this question has been beaten to the death but I'm new to this and I just got this truck. Love it so far but there are things here and there that have been neglected and I'm doing a lot of the work myself. Next thing I want to do is the transmission fluid. Previous owner had it for about a year and I doubt he did anything to it. He didn't have any service records or say anything detailed he can tell me about the truck. Took it to my mechanic and he said it looks and feels great.

    So I am asking for help in this regard. What kind of transmission fluid does it take or is the best recommended? Its got about 237K miles on it so I'm guessing anything high mileage.

    Also, I'm thinking of doing a diff fluid change as well. Any ideas what would be the best?

    Anything is appreciated. Thank you!
     
  2. Apr 22, 2021 at 8:15 AM
    #2
    Glamisman

    Glamisman Well-Known Member

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    fluid is a matter of preference... make sure the fill plugs come out before you dump the fluid.
     
    Janko630 likes this.
  3. Apr 22, 2021 at 8:16 AM
    #3
    OpeCity

    OpeCity Well-Known Member

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    Long Beach, CA
    Transmission: redline mt90
    Diffs/transfer case: valvoline synthetic 75-90

    that’s what I run every 30k. Always remove the fill hole screw first.
     
  4. Apr 22, 2021 at 8:21 AM
    #4
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

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    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 660,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    If you have a manual use MT90.

    The Amsoil bags can be reused and make the changes eas.

    Front diff hex bolt tend to strip so be carful and do the top one first

    New crush washers are needed.
    8 quarts total needed, transmission needs a different type because of brass parts.
    I do mine every 50k

    A89D99EE-E1D7-4280-B196-F9E094CEC394.jpg
     
    99luftacoms [OP] likes this.
  5. Apr 22, 2021 at 8:21 AM
    #5
    Black DOG Lila

    Black DOG Lila Well-Known Member

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    Virginia
    Vehicle:
    2003 Tacoma SR5 2.7 5 speed 4WD
    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Welcome to TacomaWorld
    Transmission Redline Mt90
    Diffs and Tcase Valvoline 75w90
    Remove fill plugs first
    Use NEW crush washers
    Rexka 12pcs Transfer & Differential Service Gasket Kit Compatible with Toyota Lexus 4Runner Land Cruiser Tundra Tacoma FJ Cruiser Highlander RAV4 Sequoia Sienna 1215710010 9043024003 90430A0003 https://www.amazon.com/dp/B07CJHTDVV/ref=cm_sw_r_cp_apa_glt_i_HCPWJ34AF17JG5QX8AD7?_encoding=UTF8
     
    Kwikvette likes this.
  6. Apr 22, 2021 at 8:27 AM
    #6
    99luftacoms

    99luftacoms [OP] New Member

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    Edward
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    1999 Tacoma 4x4
    Stock...for now.
    Thank you guys, much appreciated. Would I need to change the washers on every fluid change? Also, what are the service intervals for both tranny and diff?
     
  7. Apr 22, 2021 at 8:28 AM
    #7
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

    Joined:
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    Vehicle:
    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 660,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    Yes, they are CRUSH type,
    Do them all at the same time,

    I have 660,000 on mine
     
    99luftacoms [OP] likes this.
  8. Apr 22, 2021 at 9:43 AM
    #8
    Kwikvette

    Kwikvette Woke up and chose violence

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    1998 4Runner Limited 4x4
    King 2.5 Front/Rear, OME 890, 33s, Locked +
    Two things not mentioned;

    the fill and drain plugs on the front diff are hex. Do yourself the favor of using a pick and cleaning out any and all dirt/debris caked in there. The hole is shallow enough that if the tool isn't inserted all the way, could cause you to strip the plug.

    second thing is, order Toyota part 90341-24016 which is the Lexus plug to replace your front diff drain plug.

    Your front diff fill plug torque spec is 29ft/lbs

    Your front diff drain plug torque spec is 48ft/lbs

    Your rear diff fill and fill plugs torque spec are 36ft/lbs

    And your transmission plugs are at 27ft/lbs

    Last time I serviced my diff, few months ago after replacing my CV axles -



    Here you'll see the new Lexus plug -

     
    1997tacomav6 and Black DOG Lila like this.
  9. Apr 22, 2021 at 12:53 PM
    #9
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

    Joined:
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    Vehicle:
    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 660,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    We’re your two fill and drain plugs the same size on the front diff?
    Mine were different sizes both having the Allen type style so I was only able to replace the bottom drain plug with the Lexus plug.

    If you have the Amsoil type bags no need for using a pump FYI
     
  10. Apr 22, 2021 at 1:00 PM
    #10
    Kwikvette

    Kwikvette Woke up and chose violence

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    No, front diff has a different sized drain and fill plug.

    Only the drain plug is replaced with the Lexus plug.
     
    1997tacomav6 likes this.
  11. Apr 22, 2021 at 1:03 PM
    #11
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

    Joined:
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    Vehicle:
    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 660,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    I wonder why it’s the drain one that gets seized in there?

    I had to use a chisel and a big hammer to get mine out.
    Top one was piece of cake,
     
  12. Apr 22, 2021 at 1:08 PM
    #12
    Kwikvette

    Kwikvette Woke up and chose violence

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    Well the drain plug has a higher torque spec rating on it so, that's why it'll be on tighter.

    Mine came off easily, but that's because I used a 1/2" drive as shown above. I used a 3/8" drive on the fill plug.
     
    1997tacomav6 likes this.
  13. Apr 22, 2021 at 1:11 PM
    #13
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

    Joined:
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    Vehicle:
    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 660,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    I used a 1/2 drive too and cleaned it out with brake cleaner,
    It just rounded the inside of the Allen bolt on the bottom plug.
    Yes the torque spec is probably why then
     
    Last edited: Apr 22, 2021
    Kwikvette likes this.
  14. Apr 22, 2021 at 4:19 PM
    #14
    Kwikvette

    Kwikvette Woke up and chose violence

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    Yeah that fucker is easy to strip seeing as how the metal is soft, and the hole is shallow.

    I didn't soak it in any solvent or anything but when I placed the hex tool/socket on the plug, I whacked it a few times with a mallet before putting the ratchet on it.

    Now I need to do my rear diff when I've got time; good thing is I've got all the crush gaskets and new plugs.
     
  15. Apr 24, 2021 at 6:57 AM
    #15
    cbhunt

    cbhunt Member

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    I just changed my manual transmission and diff fluids and also recommend Red Line MT90 for the transmission and transfer unit. I used Valvoline High Performance Gear Oil 80w-90 GL-4/GL-5 in the front and rear differentials. Amazon has a good price on gallon jugs of MT-90, and while you are there, I suggest buying the Rexka 12-pieces Gasket Kit that contains the complete set of new crush washers, which you should always replace when changing these fluids. And while you are doing the fluids, don't forget to grease all the driveshaft grease fittings as part of this fluid service.
     
  16. Apr 24, 2021 at 12:19 PM
    #16
    OpeCity

    OpeCity Well-Known Member

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    I think replacing the washers every oil change is a little overkill, I just do mine every 3-4 times
     

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