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.

NP 208 won't stay in 2hi

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Jrgunn5150, May 2, 2006.

  1. Jrgunn5150

    Jrgunn5150 1/2 ton status

    Joined:
    Nov 26, 2005
    Posts:
    232
    Likes Received:
    0
    Location:
    Cleveland, Oh
    I'm having another issue that I need to deal with now since everything else is getting squared away. After driving for a bit, totally randomly my NP 208 will pop out of 2 high. The shifter doesn't move, it just revs up and don't go any more. It always does it after a stop, or at least an application of the brakes. I have to drive in 4 lo for a bit, stop, shut it off, shift back into 2 high, and continue on my way.

    Anybody have any ideas? Also it is leaking at the lowest point of the case, so I have to put fluid in it everytime I go to drive it, is there anyway to seal it that doesn't involve me bench pressing it? Or am I just stuck pulling it anyway? If so I think I'm just gonna stick a 241 in there over the summer when it's sitting.
     
  2. zeroz400

    zeroz400 1/2 ton status

    Joined:
    May 30, 2004
    Posts:
    410
    Likes Received:
    0
    Location:
    Libertyville, IL
    Im not familiar with 208s but you could adjusting it the linkage.
     
  3. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Sounds like mine was , just not as bad yet . When it only finds 4lo , hopefully you will be close to home .

    I lucked out , I had 3.08 gears and 33's . I just drove home at 35 mph .

    These cases have wearable pads on the range fork . When they go the fork wears . Mine was knife edged .

    Another case and I was good to go .

    To be sure its not the linkage , just pull the cotter pins and drive around your neighborhood without the rod on .
     
  4. marv_springer

    marv_springer 1/2 ton status

    Joined:
    Aug 3, 2001
    Posts:
    2,781
    Likes Received:
    0
    Location:
    Mesa, Arizona
    Pauly is all over this one....

    Buy another used one and swap it out.... It won't get any better...!

    Marv
     
  5. Jrgunn5150

    Jrgunn5150 1/2 ton status

    Joined:
    Nov 26, 2005
    Posts:
    232
    Likes Received:
    0
    Location:
    Cleveland, Oh
    I'll check the linkage this weekend just to make sure. I don't beleive that's it since it only does it when I get on the brakes, plus I just put a new trans in there, and it was doing it before and after.

    On that note, if I need a new case, i'm gonna start looking for a 241 locally. Thanks guys.
     
  6. rick88blaze

    rick88blaze 1/2 ton status

    Joined:
    Jan 24, 2003
    Posts:
    2,342
    Likes Received:
    1
    Location:
    Knob Noster, Mo.
    As far as the leaks go, I left mine in and unbolted the tailshaft first, then unbolted the back half of the case. I cleaned everything up then ran a bead of RTV around the case, bolted it back together and it hasn't leaked a drop since. :thumb:

    Rick
     
  7. Jrgunn5150

    Jrgunn5150 1/2 ton status

    Joined:
    Nov 26, 2005
    Posts:
    232
    Likes Received:
    0
    Location:
    Cleveland, Oh
    Excellent! I will give that a try as well. Maybe if I try that I will be able to see the damage to the shift fork and how bad it is?
     
  8. rick88blaze

    rick88blaze 1/2 ton status

    Joined:
    Jan 24, 2003
    Posts:
    2,342
    Likes Received:
    1
    Location:
    Knob Noster, Mo.
    I can't remember if I was able to see the shift fork or not when I had it apart. sorry. :dunno:
     
  9. adamforsythe

    adamforsythe 1/2 ton status

    Joined:
    Oct 16, 2004
    Posts:
    1,394
    Likes Received:
    0
    Location:
    Maine
    This happen on my old 1985 K5 Blazer. If it's not your shift linkage. Your T-case only has a matter of time before it gives up. Mine made it almost a year before it got so worn it sounded like someone was beating it with a hammer. when I was going down the road. Does your truck have and vibs?
    Thanks
    Adam
     
  10. Jrgunn5150

    Jrgunn5150 1/2 ton status

    Joined:
    Nov 26, 2005
    Posts:
    232
    Likes Received:
    0
    Location:
    Cleveland, Oh
    I've already replaced the t-case, but thanks.
     

Share This Page