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700R4 to NP203

Discussion in 'OffRoad Design' started by thebigdaddyof2, Feb 7, 2002.

  1. thebigdaddyof2

    thebigdaddyof2 1/2 ton status

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    Hey Stephen,
    Just wondering how difficult it is to mate the 203 to the 700R4 using the 208 adaptor. I read on your site that you must: "drill and tap new mounting holes" and "possibly machine the input bearing retainer on the 203". Does the machining need to be done every time or is there a variation in the 203s? I know there will be added length in this variation but would that not be good for the front shaft? Also, is there any strength issues using this setup?
    Thanks always, todd

    thebigdaddyof2
     
  2. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    I think the bearing retainer is a sometimes thing, it can be really tight in the 208 adapter but that could be at least partially solved with some emory paper if you had to. Otherwise you line it up and re-drill and tap. MAKE SURE YOU HAVE THE DOUBLER ADAPTER HOOKED TO THE 203 TO SET THE ROTATION BEFORE YOU DRILL ANYTHING!!! That way your mounting feet line up right.
    White Whomper (ken) did this not too long ago with his TH700.
    Basically length is length, if you need it it's good, if not it's bad. How's that for deep thought!

    Making the world better, one truck at a time.
    SW-ORD
    <a target="_blank" href=http://www.offroaddesign.com>www.offroaddesign.com</a>
     
  3. shaggyk5

    shaggyk5 1/2 ton status

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    what are the other options for mounting a 203 to a 700?

    -matt
    <font color=purple> "Stuff's only good for 2 things, degreasing engines and killing brain cells"</font color=purple>
    <a target="_blank" href=http://www.geocities.com/shaggyk5>www.geocities.com/shaggyk5</a>
     
  4. thebigdaddyof2

    thebigdaddyof2 1/2 ton status

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    Thanks for the Deep Thought.....
    Only one question left for you, Ken or anyone else......STRENGTH???
    Is this adaptor more prone to breakage than the T350/203 adaptor?
    todd

    thebigdaddyof2
     
  5. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    For the other method, check the Doubler page on our site, explained well there.

    Strength edge goes to the TH350 plate, I think it's basically indestructible. Hard to mess up a 1" thick plate! On the other hand the NP208 adapter is pretty strong and the Doubler mounts securely so there's not a lot of stress on the adapter. I think you'd still break the tranny first. And if you do have adapter problems the 208 adapter is pretty cheap and easy to come by.
    Practically I think it's still a length/cost/ease of installation decision.

    Making the world better, one truck at a time.
    SW-ORD
    <a target="_blank" href=http://www.offroaddesign.com>www.offroaddesign.com</a>
     

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