Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

can't stop the clunk....

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fjleiter, Apr 20, 2004.

  1. fjleiter

    fjleiter 1/2 ton status

    Joined:
    Feb 13, 2004
    Posts:
    278
    Likes Received:
    0
    Location:
    Palmyra, NY
    can\'t stop the clunk....

    have a 90' blazer that clunks when put into gear or when shifting between gears (automatic). Figured it was probably the U-joints so replaced them today. problem is.. it still clunks.. Seems a lot better when accelerating etc.. but still clunks when put into drive or when coasting and it downshifts. When you put it into drive it clunks and lurches like it has a high idle but idle is right where it should be (does it regardless of engine being warm or cold). What else would cause this?
     
  2. 87BrnRsd

    87BrnRsd 1/2 ton status

    Joined:
    Apr 21, 2003
    Posts:
    2,457
    Likes Received:
    0
    Location:
    Boone, North Carolina
    Re: can\'t stop the clunk....

    Mine does that too. I dont know if its just my 700r4, or my detroit. /forums/images/graemlins/dunno.gif
    -Harrison
     
  3. BlazerGuy

    BlazerGuy 3/4 ton status

    Joined:
    Apr 20, 2000
    Posts:
    9,206
    Likes Received:
    0
    Location:
    abcde
    Re: can\'t stop the clunk....

    Have you checked the U-bolts and the tranny mounts?
     
  4. 4xcrazy

    4xcrazy 3/4 ton status

    Joined:
    Oct 31, 2003
    Posts:
    9,471
    Likes Received:
    5
    Location:
    Olympia/Lacey, Washington
    Re: can\'t stop the clunk....

    Mine does it too, typical truck clunk, i believe it has something to do with being an older truck, with wear on the trans, transfer case and rear diff, all combined, creates slop all as one, which makes a "clunk"
     
  5. fjleiter

    fjleiter 1/2 ton status

    Joined:
    Feb 13, 2004
    Posts:
    278
    Likes Received:
    0
    Location:
    Palmyra, NY
    Re: can\'t stop the clunk....

    Was my next step, still trying to find out what the bolt size is for the drain and fill bolts on the x-fer case so I can do it all at once.

    [ QUOTE ]
    Have you checked the U-bolts and the tranny mounts?

    [/ QUOTE ]
     
  6. fjleiter

    fjleiter 1/2 ton status

    Joined:
    Feb 13, 2004
    Posts:
    278
    Likes Received:
    0
    Location:
    Palmyra, NY
    Re: can\'t stop the clunk....

    Kind of what I figured but it still drives me nuts (I'm a little anal retentive about errant noises on my vehicles. Always hear the little noises no one else ever hears...)
    Should just listen to my buddy who says "turn the stereo up, the windows down and you'll never notice it" (scary thing is that he's a master mechanic, of course he's the same a**hole who convinced me to buy this K5)

    [ QUOTE ]
    Mine does it too, typical truck clunk, i believe it has something to do with being an older truck, with wear on the trans, transfer case and rear diff, all combined, creates slop all as one, which makes a "clunk"

    [/ QUOTE ]
     
  7. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

    Joined:
    Oct 6, 2002
    Posts:
    2,813
    Likes Received:
    2
    Location:
    San Francisco
    Re: can\'t stop the clunk....

    They're 1/2" NPT. Pipe threads.
     
  8. 4xcrazy

    4xcrazy 3/4 ton status

    Joined:
    Oct 31, 2003
    Posts:
    9,471
    Likes Received:
    5
    Location:
    Olympia/Lacey, Washington
    Re: can\'t stop the clunk....

    BTW, it'll be on it's way tomorrow. sorry for the delay. been busy during the days.
     
  9. motofool

    motofool 1/2 ton status

    Joined:
    Apr 7, 2004
    Posts:
    361
    Likes Received:
    0
    Location:
    DFW tx
    Re: can\'t stop the clunk....

    mine clunks in teh driveshaft where the slip yoke is threads are worn check your i also have a bit of play in my gears up front
     

Share This Page