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SM465 and NP205 Question!

Discussion in 'The Garage' started by DuallyK5, Apr 25, 2006.

  1. DuallyK5

    DuallyK5 Registered Member

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    I have a 1988 k5 blazer that had a 700r4 in it. This is the 3rd 700r4 my truck has eaten so I am going to put a SM465 4speed into my truck. My only dilemma is figuring out all the combinations that are possible with this tranny with the spline outputs and inputs of the transfer case. I have a NP205 I am planning to use on this tranny. It is the older version with the figure 8-bolt pattern. Now my NP205 has a 27 input and it has the 27spline slip yoke conversion on it already. Now I was reading up on these trannys and transfer cases. I understand that there is a long and a short shaft on the SM465. I know that there was a 10 spline short I believe that was originally bolted to a NP205 with a 10spline input or a 27-spline input. I know that the SM465 also has a 35spline on the 2wd version so this transmission. Now I also have heard that is has a 32-spline 4wd output witch went into the NP208's and new style NP205 with the circler bolt pattern. I heard that the 10-spline shafts wear out excessively on the SM465 output and or input on the NP205. Now I from what I believe there is a 4wd SM465 with a 32spline output is this true. And is there a 32spline input I could get for the late model NP205 to get it to work with the SM465 so they both utilize a 32spline shaft. I understand that ORD has the 32spline short and the 32 spline long input shafts for the 205. Can I get a SM465 and a late model NP205 to both have 32 spline shafts? I believe that would be the strongest and would last the longest am I correct? Where can I find a kit or what parts would I need to get the SM465 to have a 32spline 4wd output that would work on a late model NP205 with a 32spline input. And I also believe the input for the NP205 32 spline is a female am I correct? If anyone can please help me on figuring this puzzle out I would really appreciate it. Also if I were to find a SM465 with a 10spline output what shaft is 4wd, short or long? And would that hold up if I were to mate the 10spline SM465 output and the 27spline input for the 205 with a 10 to 27spline coupler sleeve. Also what adapters would I have to use for what. I would like to use the stock GM cast iron SM465 to NP205 Adapter if possible. Can someone please help me out?
     
  2. noahrob

    noahrob 1/2 ton status Author

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    Hey Man,

    I don't know the answer to any of the questions you asked, sorry. But I do run a 465/205 combo (which I love) and woudl be more than happy to crawl under my truck tomorrow evening and take pictures of it if that would help at all...
     
  3. DuallyK5

    DuallyK5 Registered Member

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    Yeah

    Yeah that could help me a little bit. I was reading up on it and unless someone makes a 32spline kit like ORD or someone it has to be customly done. Costs a bit of Money. What year truck you got you prolly have teh 10 spline output and a 10 spline input or you can have the 10 spline output and teh 27spline input witch was another factory thing just with a diffrent coupler. If you can get a bunch of pictures of like the crossmenber and tranny and transfer also the adapter that would help me out alot. Im coverting my auto to a 4speed.
     
  4. noahrob

    noahrob 1/2 ton status Author

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    No worries, I will take a bunch of pics tomorrow night when I get home from work. The tranny and transfer case I have are out of a mid 80's Chevy truck, it was part of a trade. I switched from a TH400/205 to this setup. We didn't separate the tranny's, rather just moved them together as one big piece
     
  5. DuallyK5

    DuallyK5 Registered Member

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    kool

    Thats good to know. Do you have the hydrolic clutch or are you using the manual clutch? I got a 383 stroker in my truck as well. I seen you have a 383 on your car domain profile. Mines pushing like 480hp and 530ft/lb's. I am looking around junkyards and people that i know for the SM465, Bellhousing, Clutch Pedal Assembaly and the Proper Crossmember and also the Adpater from SM465 to NP205.
     
  6. noahrob

    noahrob 1/2 ton status Author

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    I have the manual linkage, and although I read a lot of people that said it sucks, I like it. It has popped out twice, but the truth is I didn't put all the spring on to hold it in place so...

    As for the engine, I am pretty sure I don't make anythgin close to that much power, but it seems to go pretty good most of the time....

    There is a guy in the clasified section of this site selling the full clutch setup, Bellhousing too I think for like $100...
     
  7. jwglover

    jwglover Registered Member

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    27 spline 205 is for the 350 tranny, you would have to change the input shaft to the 10 spline and get an adapter plate to a four speed to make that tranfer case work. That would be easy enough to do. The 32 spline conversion,,,, just find a 4 speed and t -case out of a 83 -89 one ton , or 88-92 one ton ( old style), and you can get the hydro pedals,bell housing and all the brackets too. That would be the eisiest if you want the stronger 32 spline.
     
  8. noahrob

    noahrob 1/2 ton status Author

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    OK, a little late, sorry, but here are some pics

    IMG_2441.JPG

    IMG_2442.JPG

    IMG_2444.JPG

    IMG_2443.JPG
     
  9. carrerad

    carrerad Newbie

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    noahrob,

    Could you email me tyhese images, I am doing a SM465-NP205 conversion on my 84 GMC P/U. I tried to open them from this post but the system wont let me.

    Thanks.
     

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