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Part-time conversion kit for np-203??????

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Grinder, Jul 11, 2001.

  1. Grinder

    Grinder Newbie

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    i was reading one of the popular off-road magazines, i think it was peterson's but im not sure, and they had an article on t-cases. they mentioned a part-time conversion kit for the np-203, and so far i cant find one to save my life! one guy on a newsgroup said they do exist, but never told me where i can find it or any info on it. can anyone please tell me where i could find any info??
     
  2. DMK

    DMK 1/2 ton status

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    Summit racing has them.
     
  3. Jonathan

    Jonathan 1/2 ton status

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    JCWhitney has them, but I don't know how good they are.

    77 Blazer, 350, NP203, K&N, 31-inch Cooper Discoverers
    <font color=white>http://community.webshots.com/user/jonathandwill</font color=white>
     
  4. Blazer79

    Blazer79 1/2 ton status

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    Yeah, Summit has them. There are two versions, the cheap one and the complete. The complete changes more parts inside to make it more reliable.

    You will find many posts where I repeat the same thing: Don't go part time! Full time 4wd is a wonderful feature that new expensive cars have, and you want to lose it?! The cost of the kit won't justify the mileage gain. Our Blazers get low mileage because they are heavy. Period... Well, I'm sure many are also because their owners haven't made a tune-up in 20 years [​IMG].

    Stay full-time[​IMG][​IMG]

    <font color=purple>//////
    <A target="_blank" HREF=http://blazer79.coloradok5.com>http://blazer79.coloradok5.com</A></font color=purple><font color=black>
    Soon a 454 K5!!</font color=black>
    [​IMG]
     
  5. Medman74K5

    Medman74K5 Registered Member

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    Superwinch and Mile Marker both make a 203 conversion kit. Summit Racing sells both kits with or w/o hubs. I plan on trying conversion from Superwinch probably next month.
     
  6. wanarace

    wanarace Registered Member

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    I have the cheap Mile Marker kit and hubs. I have no complaints at all. And as a bonus, the grinding noise from my transfer case had gone away.:) The only thing I have problems with is sometimes I have a hard time getting it out of 4WD.
    Also when I put the kit in, my gas milage went from 8mpg to 11-12mpg and according to my G-tech my 0-60 time dropped 0.3 seconds.
    All in all I am glad I did it.

    Later
    Wanarace
     
  7. driney

    driney 1/2 ton status Premium Member

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    I agree about not changing to part time. I have a 78 chev with full time, just got my 90 Jimmy two months ago, and already have missed having full time on the Jimmy. I'm sure some people put enough miles on their truck to justify the conversion with better gas mileage, but my 78 gets 13-14 on the highway, and for city driving where it really sucks (9-10 MPG) the miles don't add up that fast anyway.
     
  8. BI U JIMMY

    BI U JIMMY Registered Member

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    I have the Milemarker conversion that I have not used. It is the kit with the shaft conversion which is much better that the cheaper ones. Write back if you are interested
     
  9. Grinder

    Grinder Newbie

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    is it the one that doesnt require me to remove my t-case? nif not, which ones are installable without dragging the t-case out?
     
  10. MTPockets

    MTPockets 1/2 ton status

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    i have a milemarker kit in mine. they also make a complete output shaft, but thats expensive. the mm kit is pretty solid, replaced my old superwinch kit that exploded.
    i like having the hubs locked in front and being able to switch to 2wheel for turns, especially since i have a locker up front.
    you dont have to drop the t-case to do this conversion, the directions with the mm kit are very thorough.
    good luck,
    MTPockets

    <A target="_blank" HREF=http://coloradok5.com/moneypit.shtml>http://coloradok5.com/moneypit.shtml</A>
     
  11. Executioner

    Executioner 1/2 ton status

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    They all can be installed without removing the t-case !
     
  12. 84_Chevy_K10

    84_Chevy_K10 Banned

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    God I'm glad I've got the NP 208!

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  13. Executioner

    Executioner 1/2 ton status

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    But you don't have 2low, do you ?
     
  14. Jason73K5

    Jason73K5 1/2 ton status

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    You might not be so glad once the shift fork pads have worn away. Mine gave me all kinds of problems.
     
  15. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Don't want 2 low--that's a good way to give your driveshaft a workout. My lift does enough of that, so I'll stick to 2 hi only. I've got 4.10 gears anyway...I don't need to show off in 2 low.

    But leave the front hubs unlocked and it's 2 low anyway.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  16. BigTex

    BigTex 1/2 ton status

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    I STRONGLY disagree with the guys telling you NOT to get the part-time kit. I put it in my '79 and I REALLY noticed a change in the gas mileage. I also noticed my front tires now last longer, and of course there is a lot less drag, hence the improved gas mileage. I drive mine daily, its my only transportation.

    <A target="_blank" HREF=http://www.chriswhitley.com>http://www.chriswhitley.com</A>
     
  17. Grinder

    Grinder Newbie

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    ok so my next question is how does it work? im very new to 4x4 and mechanics in general andf im learning as i go, i have a few ideas of how it may work, but i doubt im right. any help?
     
  18. BigTex

    BigTex 1/2 ton status

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    Well, I'm not exactly sure on the difference between the $50 kit (the one I got) and the $150 kit, but basically they both keep your front tires from spinning.

    <A target="_blank" HREF=http://www.chriswhitley.com>http://www.chriswhitley.com</A>
     
  19. slider79blazer

    slider79blazer 1/2 ton status

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    I have the $50 kit on my 79 also works GREAT! just once a week shift it in 4hi w/hubs unlocked to oil the bearings in t-case. I run 35" tire and still get better gas mileage than I did with 33s.

    <font color=purple>whats a 4 letter word for farm wagon?</font color=purple> (ford) [​IMG]
     

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