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*sm465 splines?** what th350 will bolt to my np205 -RE:correct output shaft

Discussion in 'The Garage' started by uglychevyZZ4, Apr 20, 2003.

  1. uglychevyZZ4

    uglychevyZZ4 3/4 ton status

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    what is the casting #'s for the TH350 that will bolt to my np205? i was gonna buy the one from poohbair but it is the wrong spline shaft.... anyone know?
     
  2. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output shaft

    All TH350's are 27 spline. The difference is between 2WD or 4WD. The 4WD stick out length is 7/8" beyond the end of the case.
     
  3. uglychevyZZ4

    uglychevyZZ4 3/4 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output shaft

    now im confused, i was gonna get poohbairs and he said if i had a 205 now, the splines are wrong????
     
  4. uglychevyZZ4

    uglychevyZZ4 3/4 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output shaft

    ok, now i get it, so all 350's are 27 spline but there are 2 different versions of my 205?

    so what can be done? change th350 output or 205 input??
     
  5. chevyfumes

    chevyfumes Court jester

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output shaft

    I thought you should just be able to swap in a different adapte...But what do I know.... /forums/images/graemlins/eek.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/1zhelp.gif
     
  6. SCOTTS_4X

    SCOTTS_4X 1/2 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    the short "4wd" output shaft 350 will have no tailshaft housing, just a square-ish 4bolt pattern with the shaft sticking out about 7/8" like stated above. the "2wd" long shaft will either have a long tailshaft housing sticking off the back and a seal for a slipyoke to slide on the splines (looks pretty much like the back of a 208) or it will have the housing removed and you'll see ALOT more than 7/8" of shaft, more like 4-5 inches.

    -Scott
     
  7. chevyfumes

    chevyfumes Court jester

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    I understand that, I think...LOL I thought he would just need a different adapter plate for his 205 to bolt up to a 350 4X4 tranny instead of a 400... /forums/images/graemlins/thumb.gif
     
  8. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    He would need the TH350/NP205 adapter as well as the drive sleeve and also a 27 spline input NP205. The TH400 uses a 32 spline output shaft. He would need to convert the TH400 input shaft in the NP205 to a 27 spline input for that case to work.
     
  9. SCOTTS_4X

    SCOTTS_4X 1/2 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    yeah, as scott said, you will need to change the input shaft of the t-case if it originally came off of a 400. if it cam'e off of a 400 it will have a female input, I.E. the shaft that is sticking out of the tranny will mate inside the input of the t-case. if it's off of a 350 it will have a male input shaft, just like th output shaft of the tranny, in which case they use a hollow splined "coupler" that goes over both shafts. did that make sense?

    -Scott
     
  10. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output shaft

    This is what I (think I) know...

    TH350 205/203 use the same 27 spline output shaft and different adapters. Short adapter with female input on the 203, longer adapter with male input on a 205 (use a coupler tube). 208 on TH350 uses a longer output.

    TH400 uses a 32 spline femal input on the TH400 and no coupler. 203/205/208 are all different length outputs and there are 2 different 205 adapters (round and "8") but I think they use the same output.
     
  11. uglychevyZZ4

    uglychevyZZ4 3/4 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    was never a 400. it has been 465 /205 and i hate having a stick and want to get atx /forums/images/graemlins/1zhelp.gif
     
  12. Calclips

    Calclips 1/2 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output shaft

    I've got a th350 and a 205... my tranny has the 7/8" stickout that was mentioned by everybody else, but my setup uses no drive sleeve, the trannys shaft sticks right into the transfercase without one. I didn't put this combo in the truck... so I have no idea where it came from. The output shaft is the same as the other 4wd Th350 that I have, so that isn't any different.
     
  13. doctor4x4

    doctor4x4 1/2 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    let me add to the confusion /forums/images/graemlins/rotfl.gif
    4x4high is right on from my experience
    i will only add that please keep in mind that the np205 32 spline that fits the turbo 400 32spline naturally has a larger diameter in the case to accomadate the larger diameter shft so
    so ya cant use the 32 spline t case on a turbo 350 tranny with out MAJOR mods
    and to the guy that says he has no drive sleeve
    do you know what 1 is ??? i think not as every 350-205 that i have seen has a drive sleeve weather mounted in the adapter perminentially or "floating" between the seals
    well thats it from here and if ya still looking for a 205 with adapter and drive sleeve and shifter pm me as i have 1 i would sell with guarantee
    hope it helps
    Randy /forums/images/graemlins/usaflag.gif
     
  14. uglychevyZZ4

    uglychevyZZ4 3/4 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    so how many splines is my 465?
     
  15. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    If its an early SM465 then it will be a 10 spline, if it is a later round bolt pattern then from what I have heard it could be a 32 spline.
     
  16. JDNobodi

    JDNobodi 1/2 ton status Premium Member

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    Calclips, you must have an have an early TH350/NP205 tranfercase(pre 73). The drivesleeve is supported by a big bearing in the adapter.
     
  17. Don

    Don 1/2 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    I think the "stick" has a spline count of 10. You will still need the adaptor, from the stick to the 205. /forums/images/graemlins/eek.gif
     
  18. Corey 78K5

    Corey 78K5 1 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    **** It Man just get a 350/203 and then save your pennies for a doubler.
     
  19. uglychevyZZ4

    uglychevyZZ4 3/4 ton status

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    ya, im thinkin bout it, but dunno yet. i have access with that setup from poohbair but he wants my np205 in trade, not sure if i can let that go /forums/images/graemlins/rotfl.gif
     
  20. kennyw

    kennyw N9PHW Premium Member

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    Re: Tranny cast #\'s? what th350 will bolt to my np205 -RE:correct output sh

    If you are not totally confused yet...

    Your SM-465/NP-205 has a 10 spline output/input and coupler. To use it behind a TH350 you would have to get the TH350 adapter, 27 spline drivesleeve and 27 spline input gear for the NP205. The t-case input bearing is the same size on both the 10 spline and 27 spline.
     

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