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SM 465 Question

Discussion in 'The Garage' started by Currank5, Apr 19, 2007.

  1. Currank5

    Currank5 1/2 ton status

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    What i'm wondering is what is the difference in length between a 465/208 combo, and a 700r4/np208 combo?

    I swapped to a 4spd manual w/ overdrive and it was the same length as the 700r4/208 combo. Mounted to the same bolt holes on the frame and everything. I didnt have to do any mods to the driveshafts.

    My tranny is starting to sound like its gonna blow up and i'm considering bolting a 465 to my hydro bellhousing but am wondering if i'll need a new rear shaft. Anybody help?? Thanks.
     
  2. tarussell

    tarussell 1/2 ton status

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    Need to know what years we are talking about ???
    Sounds like you have a early 1980's combo since you said it has a O/D manual tranny . I assume the tranny had a 27 spline output shaft and the 465's that came with 208's had 32 spline shafts in them .
    In 1985 all GM tranny and transfercases started coming with a comon length made possible due to the adapters - I do not know if the year that you have will work out as the same length or not .

    Tom
     
  3. Currank5

    Currank5 1/2 ton status

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    The transmission i have in it now came out of an 85' K10. I have never seen one of these transmissions in a k5. I'm not sure what the spline count is. What is it on a 700r4 out of an 88' K5? I have that T-Case still, could that possibly be a 32 spline?

    When i was daily driving this truck i liked having the OD. I have another car now and i'm looking the make this more of a toy/tow rig and am probably not gonna need the OD that often. Therefore i am trying to decide to go 465 or rebuild the thing i have in it now.
     
  4. tarussell

    tarussell 1/2 ton status

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    Late model 4L60E's have 32 splines at the rear but the 1988 should most definetely have 27 spline out put shaft in it - sorry .

    I think GM only used that O/D 4-spd a couple of years and than canned the option.

    Tom
     
  5. Currank5

    Currank5 1/2 ton status

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    So any 85+ tranny t-case combo should be the same length with whatever adapter is on it?

    And it looks like i'll need a new t-case too if i do this swap. I'm assuming any 85+ 465 is 32 spline? But wont have to mess with driveshafts providing the t case has slip yoke.
     
  6. k30bb468

    k30bb468 1/2 ton status Premium Member

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    Here's a SM465 ,adapter ,& NP208 I have for sale
    PM me if you are in need of one.

    for sale 2-18-07 005 (Small).jpg

    for sale 2-18-07 005 (Small).jpg
     
  7. u2slow

    u2slow 1/2 ton status

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    Should be the same length. There is only one front driveshaft listing for 81-87 10 and 20 series inclusive.
     
  8. Ronnie4wd

    Ronnie4wd 1/2 ton status GMOTM Winner

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  9. Currank5

    Currank5 1/2 ton status

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    Yup. Thats the one.
     

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