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Need some NP205 help

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by wayne, Dec 3, 2001.

  1. wayne

    wayne 3/4 ton status

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    I looked on the web for any good info on a 205's internals and could not find any good pics or articles. I have a few slip yoke 205 cases I want to convert to fixed yoke and have a general idea of what is involved but would like some pics so I can look things over before I proceed to do them. I am planning to do a write up on this and take pics as I do them and hopefully Steve will use it in the tech section. Also is there any special tools needed that I need to get ahead of time? I am planning to do 1 conversion this comming weekend for my truck.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  2. michaelm

    michaelm 1/2 ton status

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    <a target="_blank" href=http://www.customtruckshowcase.com/forum/showthread.php?s=&amp;threadid=146>http://www.customtruckshowcase.com/forum/showthread.php?s=&amp;threadid=146</a>
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Michael...remind me to peruse your collection of manuals when I see you.[​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  4. wayne

    wayne 3/4 ton status

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    That is a good start. Any other helpful info that anybody can provide?

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  5. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    You need the rear output shaft and a seal retainer, You may also need some speedo parts depending on what output shaft configuration you get. We have some new 205 rear outputs and may have to actually build the bearing retainers since they're not available anywhere anymore.

    That 4x4 power article had some really good stuff in it, I seem to recognize some fingers in there.....

    Making the world better, one truck at a time.
    SW-ORD
    &lt;a target="_blank" href=http://www.offroaddesign.com&gt;www.offroaddesign.com&lt;/a&gt;<P ID="edit"><FONT class="small">Edited by Stephen on 12/04/01 01:33 PM.</FONT></P>
     
  6. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    I did mine a while back and from what I can remember you will need:
    Obviously sockets and wrenches (to remove the bolts), large socket/wrench for speedo assy., vice-grips to remove the metal breather (it was in the way of one of the housing bolts), good snap ring pliers for the normal snap rings, even better snap ring pliers/spreaders (for one thick and hard to open C-clip/snap-ring on the slip yoke shaft, I had to borrow a buddies tool made just for spreading clips like that after I broke my good snap ring pliers), telescoping magnet (to fish out needle bearings), seal/race driver (can be improvised with other tools), rags, and a catch can for all the stinky fluid.

    I don't know if you will have the same problem but my slip yoke and fixed yoke tail housings (the metal part that bolts directly to the case, not the aluminum end) were "clocked" differently, and since they could only go one way, I had to re-use the housing off the old slip-yoke for the new fixed yoke to keep the speedometer assy in the correct location. I ended up buying new gaskets and output seal, as well as a new rear output bearing assy (not the big needle bearings in the inner end of the shaft or the final ball bearing/cage assy. in the rear, but the intermediate needle bearings with cage. (while driving the old one out, and I can't remember if I "had" to or not, but I did, I busted the cage so I got a new assy.). It is pretty straight forward, just lay things out in an open area in the order you took them off, and then put them back in in reverse order (after cleaning). If I can get ahold of a digital camera I will take a picture of the slip yoke assy. (I still have laying around in the garage) and take pics of that stubborn clip and the needle bearing assy I had to replace. Hope this helps.

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

    Wheels 1/2 ton status

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    Pretty well summed up except for two things. 1) On the metal housing, you'll have to drill a small drainback hole. Use the gasket and the (aluminum) output bearing retainer to locate the hole. This allows for the gear oil to drain back into the case and prevents pressure buildup at the rear output seal which causes it to leak. The hole diameter is only about 5/16". 2) Check and adjust the endplay of the rear out put shaft with the yoke assembled and the nut torqued. Endplay should be 0.002" to 0.027". If needed, the shim(s) will go between the speedometer gear area on the output shaft and the rear output bearing.
     

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