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NP205 popping out of 4Low

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Leadfoot, Dec 26, 2001.

  1. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    Anybody have a problem with their NP205 not wanting to go into or stay in 4Low? I can shift from N to 2Hi to 4Hi and back and forth, but I have the hold the shifter and push while trying to get into 4Low and it then sometimes when it does go in, it "pops" out (and grinds if it pops out in gear). Anyone else had this problem with any type of case but especially the 205 (all gear driven)? Thanks in advance.

    P.S. It was rebuilt a couple of years ago and new shift forks put in. The only thing I have done to it in the last year is put a fixed yoke output on, but I don't see how that could affect 4Low.

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Remove the shift boot and see how close the lever is to the edge of the floor hole when it's in 4-Lo. If it's really close, then a worn engine or tranny mount can let it move enough to bit the floor and shift itself out of gear. [​IMG] A bit of trimming with the sheet metal shears can fix it right up, at least until you get time to replace the worn mount. [​IMG]

    If you have installed a body lift, that can also make the clearance between the shifter and the body too tight when it's in 4-Lo.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  3. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    Thanks for the reply. Yes I did check that out. I have a 700r4/Np205 combo and had to modify the shifter to "re-center" it in the hole (but my "modifications" should not have caused this). Basically all I did was cut the stem (the part that sticks up through the floor) off, weld on a piece to offset it as much as the t-case was moved back due to the longer tranny and reweld the stem back on (furthur forward). So basically the shifter from the pivot bolt down was unchanged and now it sits in the center (or the same place it was stock) of the hole and does not come into contact with the floorpan at all even in 4Low (but you are correct that hitting the floor would cause it to pop out). I also have poly t-case mounts and ORD's poly engine mounts so my driveline hardly moves at all (not like the old mounts), so that is not an issue either (I should have specified earlier), but thank you anyway.

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  4. HarryH3

    HarryH3 1 ton status Author

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    Oooh, bummer. Then it might be time to take the case apart again. [​IMG]

    Where do you live in Western Mass.? When I lived in Mass (Worcester), I used a friends barn to drop the 'vette engine into my K5. He lives out in Westfield. It's a much prettier (and more laid back) part of the state. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  5. michaelm

    michaelm 1/2 ton status

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    I would still look towards linkage
    are you certain it got new shift forks?
    how is the pivot bolt on for the shifter
     
  6. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    I live in Hatfield...yes Hatfield (small community in Western Mass.) Its in between Northampton and Amherst (UMASS) and 20 min North of Springfield. Funny you should mention Westfield, my dad worked in Westfield (Osley and Whitney machine shop near the entrance to the Mass Pike) as a machinist for 36 years (right out of the service) until last month when the place went under (call your friend he probably saw it in the paper). He went to school to be a mechanic and learned machining in the service. The place he worked for did real well and they sold 2 years ago and the Corporation that bought it ran it into the ground and they closed the Wednesday after Thanksgiving (talk about Merry F---ing Christmas). It's tough because he does not know the CNC machines and that is all that people want to hire for around here. He's 62 so going back to school is not an option and he knows he probably will never make the money he was making. I'm hoping he will join me doing landscaping (I do it on the side after my 40+hr week at my "regular" job). I think it would be cool to work together now that I am older (when I was in my teens I don't think it would have worked well) Anyways enough rambling.

    Well I have a spare 205 and possibly another one on the way, so I may just rebuild one of those and swap them, but I was hoping I could fix this one while in the rig.

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  7. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    The linkage seems tight, I replaced the pins and washers to give it a tighter fit and cleaned and greased the pivot bolt and I have the old shift forks still, so I know I changed them out last time. Oh well, it looks like I am going to have to do something drastic [​IMG].

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  8. HarryH3

    HarryH3 1 ton status Author

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    Cool. Too bad about your dads job. It's a shame what is happening to so many smaller companies these days. [​IMG]
    I don't miss those New England winters! [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     

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