Question 4WD Actuator

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  • 1 Post By dyogim

Thread: 4WD Actuator

  1. #1
    Lurking Member davvver's Avatar
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    Default 4WD Actuator

    I think the actuator is starting to go on my 2005 DC 4x4. The only reason I think this is because when I put it in 4x4 the light just blinks and does not stay solid. The 4x4 is working find so far and engages and disengages no problem.

    Is this a sign I should it is going? And should i have it replaced now or wait until it stops working?

    The reason I ask this is because I am unsure if it will do damage to the front driveshaft or other parts if it lets go once engaged.

    Thanks for any advice!

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  3. #2
    SAS'ed #5 dyogim's Avatar
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    Default Re: 4WD Actuator

    Is 4HI or 4LO blinking? Either way, the contacts within the actuators (front diff or the transfer case) may not be fully engaging sending false signals. Even though the shift rod is shifting the fork in the diff/xfer case properly. Take the cap off of the actuators and grease the contacts. Cycle it a few times and see if the problem consist.

    Brand new, I believe the dealer wants $600-$800. Best bet is to buy from another tundra, tacoma or sequoia from around the same year. They pretty much share the same actuators.

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    Default Re: 4WD Actuator

    I think you are correct I remember reading in here about a fella who cleaned up the contacts w/ sand paper and then lubed it up well , he stated it was still working and saved a ton of $$ in fixing vs replacing.


    repo

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    Veteran Member 2003bajatundra4x4ac's Avatar
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    Default Re: 4WD Actuator

    regular ol' moly grease?
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    Default Re: 4WD Actuator

    I'd don't recall what he used and can't find the thread....

    I would think using a marine grade white lithium.... but I really have no good answers.

    Talk to your local parts guy:dunno

    Take some pics and start a thread, I know I'll follow and I'm sure there are many others who would too.

    Repo

  7. #6
    SAS'ed #5 dyogim's Avatar
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    Default Re: 4WD Actuator

    Quote Originally Posted by 2003bajatundra4x4ac View Post
    regular ol' moly grease?
    Quote Originally Posted by hilandfrog View Post
    I'd don't recall what he used and can't find the thread....

    I would think using a marine grade white lithium.... but I really have no good answers.

    Talk to your local parts guy:dunno

    Take some pics and start a thread, I know I'll follow and I'm sure there are many others who would too.

    Repo
    Use a dielectric grease. Permatex and loctite make a product for this. Most of the auto parts store should have something available.

  8. #7
    Supporter Remmy700P's Avatar
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    Default Re: 4WD Actuator

    Quote Originally Posted by dyogim View Post
    Use a dielectric grease. Permatex and loctite make a product for this. Most of the auto parts store should have something available.
    +2. You must use a dielectric grease for lubricating electrical contact surfaces. Any other grease (moly, lithium, etc) will inhibit conduction.
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    Default Re: 4WD Actuator

    Am looking for my 4 wheel drive actuator under my 2000 Tundra. Can anyone give a link or a picture of what I am looking fer? I have the green blinking 4wheel light on my dash.....wanting to lube it up with dielectric grease and see if I can DYI it. Thanks!!!

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    Default Re: 4WD Actuator

    I found the 4 wheel drive actuator under the truck. 3 10mm bolts and one vacuum line later it was open. It was filled with yellow grease (dielectric grease?) I put it back together and snipped off 1 inch of tubing in hopes that it would work. No luck! The 4wheel lights still blink. I tried backing up in 4wheel, turning the wheel left and right down the street. When I pushed the button back into 2wheel I got a clunk when I drove about 20 feet forward. Not sure what that all means.

    Next plan of attack is to check the CV joints. The driver side looks a bit greasy and will have a professional look at it. I do not have a mechanic's greasy thumb.....

    Any further help is appreciated!

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    Veteran Member 2003bajatundra4x4ac's Avatar
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    Default Re: 4WD Actuator

    that clunk is normal on these rigs. best to coast while waiting for them to engage/disengage.
    All you Baja lovers check out: http://www.MasOlas.com


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    Default Re: 4WD Actuator

    Quote Originally Posted by Remmy700P View Post
    +2. You must use a dielectric grease for lubricating electrical contact surfaces. Any other grease (moly, lithium, etc) will inhibit conduction.
    Actually it's the other way around. A dielectric material is an electrical insulator. Dielectric grease is completely non-conductive. The purpose of the dielectric grease is to prevent oxidation or corrosion of the metal surfaces while providing electrical insulation. It's a crap shoot applying other types of grease to electrical contacts as some types of grease are conductive. Moly grease is somewhat conductive, for example, and would be a bad choice for lubricating electrical contacts.

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