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.

Driveline Problem??

Discussion in 'The Garage' started by twodollars, Sep 6, 2006.

  1. twodollars

    twodollars Registered Member

    Joined:
    Jul 19, 2006
    Posts:
    49
    Likes Received:
    0
    Location:
    Wayne, MI
    Pretty sure this is my first post, but been reading for a while. Hope someone out there can help. Truck is an 88 3/4 ton suburban, 6.5 with a banks turbo kit. TH 400 trans, NP208 case. Problem is under hard acceleration i get a sound like a gigantic rathcet clicking from the truck. I can't feel it in the seat or floor, but I am leaning towards a tcase issue. Same noise whether in 2 or 4. U joints are new, driveshaft is new, and it has a newer 14 bolt out back. Any ideas??
     
  2. Desert Rat

    Desert Rat Fetch the comfy chair

    Joined:
    Oct 19, 2002
    Posts:
    16,250
    Likes Received:
    3
    Location:
    Tri-Valley, NorCal
    Do you have auto hubs on the front? Perhaps they are engaging and slipping?
     
  3. twodollars

    twodollars Registered Member

    Joined:
    Jul 19, 2006
    Posts:
    49
    Likes Received:
    0
    Location:
    Wayne, MI
    No, the hubs are manual warn's. Might run it by alocal trans shop and see what it sounds like to him. Most likely it will sound like a 1000 dollars or so. But I might get lucky and find an honest guy.....
     
  4. diesel4me

    diesel4me 1 ton status Premium Member

    Joined:
    Jul 24, 2003
    Posts:
    17,547
    Likes Received:
    937
    Location:
    Massachussetts
    might be..

    The chain in the transfer case might be stretched out,and slipping over the sprockets under hard acceleration...thats where I'd look first..:crazy:
     
  5. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    Before you take it to the tranny shop crawl under it and pull the cover on the bell housing. Check the flex plate for loose bolts or cracks.
     
  6. bladwin

    bladwin Registered Member Premium Member

    Joined:
    Oct 7, 2005
    Posts:
    71
    Likes Received:
    0
    Location:
    Seattle
    Re-check your u joints, especially if you have any lift. My rear broke and would chatter like that under accel. I had never heard a u joint sound like that before, I thought for sure my rear end was toast.
     
  7. twodollars

    twodollars Registered Member

    Joined:
    Jul 19, 2006
    Posts:
    49
    Likes Received:
    0
    Location:
    Wayne, MI
    thanks for the ideas. I will check it out this weekend. And yes, it does have some lift, a six inch superlift kit.
     

Share This Page