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Difference between Dodge and Chevy 203?

Discussion in 'OffRoad Design' started by 79Beast, Feb 27, 2003.

  1. 79Beast

    79Beast 1/2 ton status

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    I just traded a busted D70 for a good condition NP203 with adapter and shifter from behind a TF727 out of a Jeep. Is this 203 the same as the GM parts? Also, can the I just swap out the input shaft for the SM465 version? I already have a 465/203 adaptor and will start hunting a 32sp 205 when I have everything ahead of it ready.
     
  2. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    Yes, swap in the correct input gear and it'll bolt to your 465/203 adapter, no problem. The dodge 203 case is the same as the GM case, the only difference is the input gear and the shifter link has a smaller hole in it.
    The reason we have a dodge doubler is the dodge trans to NP203 adapter rotates the 203 a bit different than a GM 203.

    I think you're on the right track, you seem to know everything you need to know.
    One new thing that is coming up is a short 32 spline output shaft for the SM465 that will allow you to use a 32 spline input gear between it and the NP203. It will fit with the factory adapter housing.
     
  3. 79Beast

    79Beast 1/2 ton status

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    So, if I had a factory 2wd 465...would that have the proper output shaft for the 32 spline np203 input you are referring to? I thought I was up on my "doubler data", but this is new to me. Can ORD supply the necessary pieces IE 465 version 302 input, or the short 32 spline you just told me about?
     
  4. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    We're coming out with a short 32 spline output for the SM465 that is built to work with the factory adapter length. It'll use the standard 32 spline input in the 203. Otherwise, the only way to get a 32 spline connection between the trans and 203 was to use the long factory 32 spline output shaft with the 8.somthing" long factory adapter housing. This new shorter shaft saves us 4" of overall length.
    The factory 2wd shaft is pretty much an orphan here, it's 35 spline and doesn't mate to anything. Advance adapters uses it for some of their conversions but it's not really useful for the NP203. If you have a 2wd trans you can swap the output shaft for the ORD short 32 spline and be back in business though.

    This is fairly new, the "loop" is pretty small so far, don't feel too bad.
     
  5. 79Beast

    79Beast 1/2 ton status

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    Ok, I understand. If I use the 32 spline output in my tranny and my factory 465/203 adapter I can use a "normal" 203 like what would have come on a TH350...that's awesome. When would this short 32sp piece be available? Also, If I have the rangebox off of a Dodge, would I be better off (read: cheaper) to convert my Dodge 203 rangebox to 10 spline female or my sm465 to the short 32 spline output? I assume the 32 spline is considerably stronger. Thanks for your quick replies. It helps to have it all laid out so that I can print it and know exactly what I have to round up.
     
  6. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    The 32 spline is both stronger and more durable so that is a preferable way to go.
    In your case:
    The NP203 10 spline or 32 spline inputs are basically the same price so you can go either way there.
    The 32 spline SM465 short output should run about $240 or so.
    Factory adapter housing is the same either way. So basically it comes down to which connection you want. Really we don't see many broken 10 spline SM465 outputs but we do see a lot of worn out 10 spline connections. Then you can strip the teeth out and it's still broken but due to wear, not abuse.
     
  7. 79Beast

    79Beast 1/2 ton status

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    It looks to me like my best bet is to find a cheap chevy 203 and then buy the 32 spline output for my 465 from you along with the doubler itself and the twin stick setup. Just out of curiosity, what is the cost of the 203 input? If it is considerably cheaper than the 465 output, I might just buy that and keep everything else the same.
     
  8. PJTPW

    PJTPW 1/2 ton status

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    Stephen,

    You mentioned the Dodge trans to NP203 adapter rotates the 203 a bit different than a GM 203. What is the difference in rotation between the two? Just curious.

    Ryan
     
  9. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    Without looking up a few drawings I couldn't tell you for sure, it's a few degrees I know. It kind of threw me the first time I tried to put a GM Doubler in a Dodge truck. It looked funny.
     
  10. 79Beast

    79Beast 1/2 ton status

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    I'll find out tomorrow for sure, BUT I'm pretty sure I broke the input shaft on my 205, the output on my 465, or the drivesleeve. If I have a Turbo 400 version 205 and I buy the short 32 spline output for my tranny, will it bolt up?
     
  11. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    We got to this on the phone, basically you can do a 32 spl. 465/205 connection but it will use the NP208 shaft and will be going backwards too far in your case.
     
  12. 79Beast

    79Beast 1/2 ton status

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    Yep, I posted this a day or two before talking to you. If I understood correctly (and for anyone following this discussion) I can use the ORD custom short 32 spline output for my 465 to bolt up a th400 version 205 using the factory 465/205 adapter. I could use a factory late model 465 factory 32 spline output meant for a 208, BUT it is too long and would require the use of a spacer. Or, I could bolt up my spare 10 spline 465 and wait until I get a doubler to upgrade to 32 spline. Thanks Stephen.
     
  13. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    That's almost right, actually the short output shaft is made for mating to 203 using the factory adapter, it won't work with the factory adapter to mate to a 205. But other than that, you got it.
     

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