Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

205 spline swap

Discussion in 'The Garage' started by shaun, Dec 19, 2003.

  1. shaun

    shaun 1/2 ton status

    Joined:
    Apr 22, 2003
    Posts:
    745
    Likes Received:
    0
    Does any one know how and where to get the parts to change the input spline on my 205 from a 10 spline male to a 32 spline female. I was reading in the ord tech that the adapter from a 700r4 to 205 requires a 32 spline female. Did I read that correct? /forums/images/graemlins/thinking.gif
     
  2. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

    Joined:
    Mar 4, 2001
    Posts:
    2,049
    Likes Received:
    0
    Location:
    Bartlett, Texas
    The parts you are looking for came in some Ford NP205's not sure on the year, but you might PM OL14BLAZ. He is going to do the same swap.
     
  3. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    Ford is 31 spline. You can get 32 spline inputs and info on the conversion from ORD. No idea about 700r4 conversions...
     
  4. R72K5

    R72K5 Banned

    Joined:
    Mar 5, 2001
    Posts:
    8,905
    Likes Received:
    0
    Location:
    central IL
    what about 1980 205 with 465 ? or any of the 1 ton with 465 in 81-up ??

    but does he mean/need long or short 32 ?
     
  5. K5BLT4FUN

    K5BLT4FUN 1/2 ton status Premium Member

    Joined:
    Feb 28, 2000
    Posts:
    496
    Likes Received:
    0
    Location:
    Peculiar, MO USA
    The Turbo 350 and 700R4 transmissions are a 27 spline output. The Turbo 400 is a 32 spline. The 465 4 speed is a 10 spline, unless it is an late model.The GM 205 inputs were as follows: Mated to a TH400 directly with a 32 spline female input shaft/gear. Mated to a TH350 it has a 27 spline male input shaft/gear with a coupler connecting it to the transmission output shaft. Mated to a 465 it had a 10 spline male input shaft/gear with a coupler connecting it to the transmission output shaft. I purchased the new 32 spline input shaft/gear for my conversion from a local company called Inland Truck Parts. It's not cheap though.
     
  6. shaun

    shaun 1/2 ton status

    Joined:
    Apr 22, 2003
    Posts:
    745
    Likes Received:
    0
    So to adapt my 205 (ten spline male from a 77 sm465, 3/4 ton) I will have to put in a 27 spline (male or female?, long or short?) such as found in a t350 version.?.
     
  7. K5BLT4FUN

    K5BLT4FUN 1/2 ton status Premium Member

    Joined:
    Feb 28, 2000
    Posts:
    496
    Likes Received:
    0
    Location:
    Peculiar, MO USA
    When I mated my first GM NP205 to my 700R4 I used a Advance Adapter output shaft in the transmission. Then I used the factory adaptor with coupler between the transmission and transfer case. I used a 205 from a TH350. In your case you would have to replace the input shaft/gear of the 205 with a 27 spline male. Then you would have to get a factory adaptor with coupler. You then have two options on the 700R4 output shaft. You could install the AA output shaft or you can purchase a spacer to go between the tailhousing of the transmission and the factory adaptor. Do a search and look for 700R4 to 205, it has been covered before.
     
  8. shaun

    shaun 1/2 ton status

    Joined:
    Apr 22, 2003
    Posts:
    745
    Likes Received:
    0
    Well I called Advanced Adapters and it seems they have an adapter for a 700r4 to a 10 spline 205 (from a sm465) so may not need the new spline. Do you think I should do it any ways. The adapter for a 700r4 to a 32 spline 205 is 400+ while the 10 spline is a little under 200. Will that 10 spline hold? (plans for eventual doubler?)
     
  9. K1Orion

    K1Orion 1/2 ton status

    Joined:
    Jan 8, 2003
    Posts:
    812
    Likes Received:
    1
    Location:
    st.louis,MO
    Before you start swapping shafts around you might consider trading your 205(and trans if you are getting rid of it) for a 205 that meets your needs, ie a 27 spline 205. Somebody might have a 27 spline they don't need and would take your 10 spline. Just a suggestion. /forums/images/graemlins/smirk.gif

    And, Adapters add overall length to the drivetrain, which could be an issue in a K5 with a doubler.

    I'm not an expert but I believe a 10spline would hold up, its just not the ultimate in strength. Do you need the ULTIMATE? ORD's site says 10 splines hold up but are more prone to wear in the shaft and coupler.

    IMHO if you are gonna do a doubler, do the AA output shaft on your 700 and use a 27 spline 205, Later when you do a doubler, 27 spline 203 range boxes are much easier to find than 10 spline. The only prob may be front shaft clearance when you just use the 700 and 205.

    Also, you might want to post this <font color="red"> ? </font> in the ORD forum or a link to this.
     
  10. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

    Joined:
    Dec 14, 2001
    Posts:
    22,060
    Likes Received:
    69
    Location:
    Pleasanton, CA.
    When doing a Gen II ORD doubler you need a 32 spline input on the 205. If you have a 10 spline now you will need to completely disassemble the 205 and have the case machined for the larger bearing and shaft. You will need a 27 spline 203 with the factory TH350/203 adapter. It is best to install the AA output shaft in your tranny to keep the overall length to a minimum.
     
  11. doctor4x4

    doctor4x4 1/2 ton status

    Joined:
    Jan 22, 2002
    Posts:
    1,450
    Likes Received:
    0
    Location:
    Los Angeles
    Well i Gotta chime in on this one :-)
    From what i read every body is right except ring master But Randy allready corrected his mistake in that ford is 31 spli9ne and chevy is 32
    but Every Body else forgot to mention 1 very important thing :-) Lol
    ya might wanna pm doctor4x4 to see if he has any of the parts for ya as he has a few 205 t cases he is parting out
    and he has done 3 of these conversions in the last 4 mounths
    2 different ways
    well hope it helps
    R
     

Share This Page