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How many different t-case adaptors are there?

Discussion in 'OffRoad Design' started by thatK30guy, Jan 5, 2002.

  1. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I'm trying to figure out how many adaptors there are from '73 to '91. Let's see if anybody else can confirm what I have counted:

    NP203
    350
    400
    465

    NP205
    350
    400-tall (up to '84)
    465
    3-speed
    400-short ('85 and newer)
    465-short ('85 and newer)

    208
    350 ('81 & '82)
    700R4
    400
    465
    3-speed

    700R4 ('85 and newer)
    400 ('85 and newer)
    465 ('85 and newer)
    3-speed ('85 and newer)

    These are all the adaptors I can think of. If anybody else knows of more or if some of these don't sound right, let us all know.



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  2. m j

    m j 1/2 ton status

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    241 case?

    formerly 77chev
     
  3. bigbluek20

    bigbluek20 1/2 ton status

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    How about the 89mm tranny? I have one in my 82 K20 mated to an np208.

    The adapter looks like it might be the same as the SM465 (just looking at the bolt pattern... I don't have anything else to compare it to). I would like to know about the transfer case... is it a 27 or 32 spline input? I am planning on a 700r4 soon.

    BTW, in case anyone is wondering, it is a 4 speed manual overdrive tranny... nice to drive, shifts like a car. Unfortunately, it is geared like a car tranny too.

    Any info would be greatly appreciated on the adaptability for an auto.



    [​IMG] Designing Tomorrow the Night Before Yesterday's Technology
     
  4. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Mike, the 241's are the same adaptors as the 208's, aren't they? (only on the '85 and newer, which are "short" adaptors)



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I have never seen one of these tranny's. I have only heard of it from one other person on this site besides you and I still don't know what to say or believe.



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  6. m j

    m j 1/2 ton status

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    MOD only lists 2 part # for input gears on a 208 from 81-88
    27 spline 14037994
    32 spline 14037995

    formerly 77chev
     
  7. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Mike, I saw pics of your truck and liked what I saw.

    What are the specs on the lift, body lift, and tires?



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  8. m j

    m j 1/2 ton status

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    on the 241 adapter, I have a similar thread going in the main forum and 2 respondants were posting differences between the 2 adapters. I believe they share bolt pattern but there are differences, no hard facts yet.

    on specs for my ride it is in my bio, if it isnt there ask me specifics and i will answer as best i can

    formerly 77chev
     
  9. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Cool on the lift and specs, but what size are those Swampers you have on your webshots.com site?



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  10. m j

    m j 1/2 ton status

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    38.5/16/16.5
    i liked the proportions of width to hieght, the 39.5 are 1" narrower and never look 'right' to me

    formerly 77chev
     
  11. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I know what you mean. Too tall a tire for the width.

    Those Radial Swampers I want are 38 x 15.5 x 16.5, so that's not too bad. I will be using my extra set of 12 x 16.5 Weld wheels from the shed. [​IMG]



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  12. bigbluek20

    bigbluek20 1/2 ton status

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    According to Advance Adapters, the 89mm was used "sparingly" in "late model 1/2 tons" (or something to that end). They claim a first gear ratio of about 4:1.

    Hogwash. According the the factory info (shop manual), gears are 3.09, 1.67, 1.00, and 0.73 (need I say more on why I don't want it any more? I miss granny). Mine was in the truck from factory in 82. The truck is a 3/4 ton. From what I heard, it only came behind diesels. Could be true. Mine was originally a diesel. But the 89mm bolted up clean to the 350.

    So, what I know, it was used sparingly (I haven't ever even seen another). It works fine reliability wise, but is a dog off-road. Shifts nice (when compared to the SM465), not rumored to be a "heavy duty" unit (mine is a light duty 3/4 ton... under 8600 gvw). Clutch is the lighter one (again, much easier travel than the SM465).

    So, can anyone make my dream come true and tell me this is a 27 spline? (and be correct)


    [​IMG] Designing Tomorrow the Night Before Yesterday's Technology
     
  13. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Now that you mention it...realsquash on this site had one in an '80-something truck he once had. He told the info on his site how he had an OD tranny in the truck.



    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  14. prjt_blzr

    prjt_blzr 1/2 ton status

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    Some late model V30 series ran the 205 bolted to a 5 speed. They used the round bolt pattern and the long 32 spline input. Not sure of the years though. The JY where I picked up my 205 told me it was from a '90 dually.
     
  15. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    I think that's a pretty good rundown. There's always a surprise, but that list seems complete.

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

    Leadfoot 1/2 ton status Premium Member

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    Now if we only had one spot with a picture of each, that would be great for the tech section (**hint hint**), or is that what you are working on? [​IMG]

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  17. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Yep Chris, you guessed it!! [​IMG] That's exactly what I'm trying to do...round up all the different adaptors to take pics and give a short description of them. [​IMG]



    <font color=red>Only real men drive K30's!!!</font color=red> [​IMG]

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  18. Mudstud

    Mudstud 1/2 ton status

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    You Rock Wes!

    Mudstud
    <a target="_blank" href=http://communities.msn.com/OffroadK5s6superliftand33s.msnw?albumlist=2>http://communities.msn.com/OffroadK5s6superliftand33s.msnw?albumlist=2</a>
    76K5 6" with 33s, sb400/350/203parttime/3.73-D44/GM12bolt
     

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