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how many different 208 variations are there.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by crossy, Aug 19, 2001.

  1. crossy

    crossy 1/2 ton status

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    I have a 208C from unknown source and i want to advertise it correctly. I see guys asking what was in front of it . Th350 ,700R4, Sm465 . I know what they are but how does it make a difference. should I just count the output splines. thanx , DAVE

    Always searching for that pot of gold!Got any old musclecar parts lying around????
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    On the Chevy/GMC vehicles, there are 3 different variations.

    10 spline was on the 465 manual trannies.
    27 spline was on the 700R4 and 350 trannies.
    32 spline was on the 400 trannies.

    <font color=blue>"Ya don't have to beat it, ya know!!!</font color=blue>

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  3. k5king

    k5king 1/2 ton status

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    <font color=green>if it's mine it's from a 700 R4 [​IMG] p.s. wanna come look round the shop,,i got soooooo much stuff to get rid of i don't even know where to begin,,know anyone that want's a 67 camaro about 80% restored ? </font color=green>

    <font color=purple>ANYBODY LOSE THEIR JEEP????????[​IMG]
    I JUST FOUND ONE UNDER MY BLAZER!!!![​IMG]
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  4. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I thought the 465 version was 32 spline? I never did take mine apart to count though. Mine was from an 81...

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

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    That is something I have already PM'd to Stephen about. I sent a PM to him on Friday to ask about this and what year it was started.

    I have read somewhere the 465 was changed to 32 spline in '82. But others have said it was changed in '81.

    Another source said it changed in '85, along with the 205 round-bolt pattern.

    So, I'm still all ears for anybody who has taken a 465/208 from '81 and newer apart. If someone knows what the 465/205's are from '81 and newer are too, lets here it.

    <font color=blue>"Ya don't have to beat it, ya know!!!</font color=blue>

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  6. newyorkin

    newyorkin 1 ton status

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    Some ford bronco's used a 208 also. I got all excited at the junkyard last week only to find it sits on the wrong side, and was bolted to some odd contraption, I guess a ford tranny... It was labelled "Bronco", and sho' 'nuff, the tag said NP208...

    Ratch
    <a target="_blank" href=http://k5.8m.com>k5.8m.com</a>
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  7. thatK30guy

    thatK30guy 1 ton status Premium Member

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    While you are mentioning Fords having a 208, so did the Dodges.

    The Dodge 208's would be worth finding just for the fixed-yoke output shaft to be converted into the GM 208.

    <font color=blue>"Ya don't have to beat it, ya know!!!</font color=blue>

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  8. ScoobyDann

    ScoobyDann 1/2 ton status

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    where exactly are we counting the splines...ahh nevermind I figured it out.

    Hut in the well is goin on in here?

    sun desert offroad <a target="_blank" href=http://4x4.alloffroad.com>4x4.alloffroad.com</a>
     
  9. crossy

    crossy 1/2 ton status

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    TAKEN APART TO FIND OUT???? so we are talking INput splines ??? cause you can see the output and count . I remeber th400 Car yokes having a larger front yoke on the driveshaft which would be the rear of the transfer box. PS K5 king you couldn't even remember WHAT you had lying around . What the hell were all those front driveshafts from????I'll get up to see the camaro.Bought a 91k5 to part from right up the road from ya, heheheh

    Always searching for that pot of gold!Got any old musclecar parts lying around????
     
  10. k5king

    k5king 1/2 ton status

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    <font color=green> truck's of course,,lol, i had so many different tranny combo's and part's truck's i just usually saved them,,just in case i needed a spare one,,which i did a few times,,lol</font color=green>

    <font color=purple>ANYBODY LOSE THEIR JEEP????????[​IMG]
    I JUST FOUND ONE UNDER MY BLAZER!!!![​IMG]
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  11. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    The 465/208 combo that came from GM in 1983 had a 32 spline input. (for sure) I am looking at it... I just converted over to a turbo-400. A very easy swap. All dimensions were the same between the two. No driveshaft mods at all. The length of the 465 and the adapter was the same length as the t-400 and adapter.

    JH

    '83 GMC Jimmy 4x4 ZZ4 Crate Motor
    '83 Chevy K20 Sand Drag Racer, 578 RWHP
    '94 Impala SS
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  12. thatK30guy

    thatK30guy 1 ton status Premium Member

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    It must have been the 465/208's that had the spline count changed in '81 or '82 then. I PM'd Stephen and asked him. Here's what he said:
    <blockquote><font class="small">In reply to:</font><hr>

    From: Stephen
    Received: 08/20/01 06:32 PM
    The early '80's are a real pain to figure out since they had leftover parts and went to a new case (208), etc.
    I would guess that you have a 10 spline, just because it's early 80's. I haven't verified it, but I think the 32 spl 205's started about '85. I know we have an '85 truck that's 32 spline. We have an '81 cab and chassis 1-ton with a 10 spline connection.
    I also suspect (but am not sure) that all the fig 8 bolt pattern NP205's are 10 spline and round pattern cases are 32 spline. I think this would be true since the fig 8 adapter housing is cut for the smaller input bearing and the 32 spline input would use the bigger bearing.
    Hope this helps!

    <hr></blockquote>

    So, the 465/205's must have been changed in '85, which I suspected.

    I still have no clue about the 465/208's though.



    <font color=blue>"Ya don't have to beat it, ya know!!!</font color=blue>

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  13. DaveDave

    DaveDave 1/2 ton status

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    The 1985 version of the np 205 is slighly differnt than the early version it has a circular bolt pattern, a larger input bearing, and is only available with a 32 spline input.
    In 1981, gm introduced the np 208 chain-driven transfer-case.
    The np 208 also has a circular bolt pattern and had either a 27 spline or 32 spline input.
    In 1988, gm next introduced the np 241 chain driven transfer case.This transfer case, as far as bolt patterns and spline is identical to the np 208.

    np 205 1979-84/85 : 1 ton th400 = 32 spline

    np 205 1971-85/85 : sm 465 = 10 spline

    np 205 1985-91 : sm 465 - th400 = 32 spline

    np 208 and np 241 1981-00 : 700r - 4l60 - 4l60e = 27 spline

    np 208 and np 241 1981-00 : sm 465 - th400 - 4l80 = 32 spline
     

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