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Slip Yoke Thunk (yes another thread/post)

Discussion in '1st Gen. Tacomas (1995-2004)' started by Madjik_Man, Jul 2, 2020.

  1. Jul 2, 2020 at 7:45 AM
    #1
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    So my 98 5MT never had axle wrap or any slip yoke thunk.

    My 04 AT has something. Trying to figure it out.

    Symptoms: not all the time, but sometimes, when coming to a stop I hear/feel a clunk/thump under the footwell. Sometimes I think I can see the auto shifter move significantly.

    Similarly when I’m going to start and and take my foot off the brake and start to roll, another thump/clunk of the same nature.

    Never noticeable at any other speeds.

    One thing of note: the auto transmission whines. Could be a transmission pump according to my mechanic. Maybe a torque converter, I don’t know?

    History: Don’t know much about the maintenance history of this truck. Original owner owned it for 14 years. Traded it in to a dealer (to buy a 3rd gen). The accountant at the dealership bought it and owned it for 4 months before selling it privately, so he could get into a 3rd gen.

    So I don’t know if the drive shafts et al were routinely greased.

    Regarding axle wrap: the rear springs are original and shot. However in my 98 they were much the same way for years before I swapped suspensions. And in my 98 I never had axle wrap symptoms.

    Last question: I’ve watched @Timmah! ‘s two videos regarding the slip yoke (thank you Timmah!) Just wondering if I go that route of manually packing it with grease, if there’s signs to look for that the slip yoke is shot due to no maintenance for the first 15 years of its life (other than obvious teeth wear)?

    Also, if it’s okay to pack that much grease into the slip yoke without causing back pressure issues on the transfer case.

    Thank you TW
     
  2. Jul 2, 2020 at 7:49 AM
    #2
    Glamisman

    Glamisman Well-Known Member

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  3. Jul 2, 2020 at 7:53 AM
    #3
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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  4. Jul 2, 2020 at 7:53 AM
    #4
    Matic

    Matic The "OFG" Baby!!!

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    Yea. I thought my eyes were playing tricks on me when I would see the shifter move occasionally on stops or starts.

    Also there have been a few times when as soon as I was at a complete stop, that I swear a car tapped me from behind.

    I attributed both of these phenomena with having a lunchbox locker in the rear, which in turn causes I bit more play in the driveline from what I've read.
    Now, I wonder if it's just normal.

    Are you also experiencing the "ping" when shifting into D or R when the driveline is under stress from being on an ever so slight decline/incline?
     
    Madjik_Man [OP] likes this.
  5. Jul 2, 2020 at 7:59 AM
    #5
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    Not so much a “ping” but a “thunk.” That I attribute to the transmission being under stress/pressure from the decline/incline.

    God, I wish this truck had the R150F in it. lol


    And yes, same symptom I have when coming to a stop/start. Feels like something tapped me from behind (no homo).

    I guess a question I have is if it is the slip yoke, would I feel it so prominently under foot all the way up front?
     
    Matic likes this.
  6. Jul 2, 2020 at 8:02 AM
    #6
    Matic

    Matic The "OFG" Baby!!!

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  7. Jul 2, 2020 at 8:03 AM
    #7
    Cattywampus

    Cattywampus Splitter of CV Boots

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    I have an 04 AT 4x4 and I have had the exact same issue/symptoms you described back when my truck had the OEM leafs. Greasing the slip joint helped alot, but didn't completely cure it. The frequency of having the thunk went way down but still happened. I switched to Deavers (roughly 10 years ago) and almost never have the issue. I still grease the slip joint once every 2-3 years or so.
     
    Madjik_Man [OP] likes this.
  8. Jul 2, 2020 at 8:04 AM
    #8
    jesus619taco

    jesus619taco Well-Known Member

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    Subbed because I feel the same thing and wondering what exactly it is to fix
     
  9. Jul 2, 2020 at 8:05 AM
    #9
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    Awesome. I figured that, like much in life, it’s not a black or white issue...that it’s probably a combo of things.

    Sounds like I have both issues going on.

    Slip yoke I’ll probably do this weekend. Suspension swap incoming...
     
  10. Jul 2, 2020 at 8:09 AM
    #10
    Cattywampus

    Cattywampus Splitter of CV Boots

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    Glad I could help in some way. Love what you did with your '98, can't wait to see how the '04 turns out.
     
    Madjik_Man [OP] likes this.
  11. Jul 2, 2020 at 8:11 AM
    #11
    Madjik_Man

    Madjik_Man [OP] The Rembrandt of Rattle Can

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    Thanks man. It’s bittersweet. I’ll probably sell my 98 here soon.

    Which is like selling my heart.

    Haven’t really bonded with this 04 yet. But with 3 humans and a 55 lbs doofus dog, the xtra cab simply does not work for us.
     
  12. Jul 2, 2020 at 11:43 AM
    #12
    Cattywampus

    Cattywampus Splitter of CV Boots

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    I'll probably be in the same situation in about 5 years, not sure how I feel about it at this moment

    [​IMG]
     
  13. Jul 2, 2020 at 11:32 PM
    #13
    mechanicjon

    mechanicjon They call me "Jonny Stubs"

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    Supercharged, AEM FIC/6, Meth Inj, ION Alloy's, Radio & Phone steering Wheel controls,Fabtech AAL, Billie's wrapped with 880's , Tundra big brake conversion, bully bars and Pioneer DDin Stereo/dvd with exterrnal usb ports. 290K and going strong.
    This ^^^
    I had the ping noise from D to R. After I torqued the carrier bearing retainer nut an additional 20ftlbs over the 51ft lbs the FSM says the noise went away.
     

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