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Tranny Upgrade Questions

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by solowookie, Apr 2, 2001.

  1. solowookie

    solowookie 1/2 ton status

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    I have an SM465, and I'd like to upgrade it. I am wondering about the positive and negative to the following aspects;

    Auto 700
    Manual conversion to NV4500

    I can get a NV4500 to about 1100 (core charge included). I'm assuming the only thing I would need to purchase would be bell housing...

    I'm not sure what kind of cost I would incure and other conversion stuff needed to do a conversion to an auto (which is what I would prefer).

    Thanks for the info...

    Jeff
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    No comments? Hmm. I would have to say that unless you do it right, which is expensive, the NV4500 is a lost cause. The Advance Adapters kit makes you remove the balancer for the tranny, and its there for a purpose. I assume driveline shortening would be necessary, as well as relocating the holes in the floorpan for the t-case, and the NV4500 shifter.

    700 is ok, but you are going to need (or want shortly) to spend money to have one built up to last. Since they came in these trucks, that would be about the easiest way to go. I'll never go back to an auto in my truck, but if I had to, it owuld be the 700 necessarily.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  3. Emmettology 101

    Emmettology 101 3/4 ton status

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    Strenght wise, the 4500 is going to be the only upgrade from your choices. The 700r4 is an auto and considered weaker than a Manual....

    I would say it depends on if you want to shift still or not..

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>

    " Ah.. Hong Kong, home of shiny green suit!"
     
  4. solowookie

    solowookie 1/2 ton status

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    I just called jbconversions (jbconversions.com). I talked with the guy, and he will supply a BRAND NEW GM NV4500 for $1450.00 (no core charge). He also has the advance adapters bell houseing for $289.00. Count about $160 for shipping both, and thats not a bad price.

    I asked him about the balancer, and he stated with my NP241 transfer case I could leave all that attached.

    I'm not even sure what the balancer is! :) Therefore I'm not sure if this is true or not.

    I really don't mind going to an auto transmission if nothing more then the fact that it is easier to drive. This will be used as a daily driver also, but I also don't mind a manual for a daily driver.

    My biggest concern is the total cost, and obviously the quality I'm getting for the cost. I can do some of my own tinkering work, but I have a bad back and I would definately be hiring somebody to do the work for me on this.

    Has anybody here done the conversion to a NV4500? Does it require cutting new holes for transfer case and shift stick etc.?

    I also have no idea how much a 700r4 would cost, but I'm assuming my NP241 will bolt up to it. I'm also assuming that drivelines etc could be purchased for this option fairly inexpensively from a junk yard...

    Thanks for the inputs, and any other thoughts on this would be greatly appreciated. I like to take advantage of the wealth of experience out there. This is my first 4x4 build up, and I'm having a lot of fun working on it.
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    Try doing a search on this board for posts about the NV4500..may be one with "NV4500" as the subject. There was a guy here, as well as the guy at the swap meet, that said you MUST retain the blancer on the NV4500...but this is with the 205, maybe with your t-case, that is not a concern. With his adapters ($400 a pop, machined aluminum with studs) and boring out the 205 to accomodate the Th400 input shaft, you can mount the NP205 to the NV4500 and keep the balancer.

    Again, this may not apply with the 241 'case, but I would definitely check. for me and the 205, it sounded way too expensive to "upgrade" to the NV4500. Over $2000 to do the swap will buy me a lot of gas that the OD would save....

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  6. solowookie

    solowookie 1/2 ton status

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    I've already searched for NV4500 stuff, and haven't seen anything that answered my questions... I may have missed something so I will go back and check.

    If anyone knows of a specific post that would be helpful that would be great...

    Speed limits here are 75 on the interstate, and 65 on the secondary roads... When I get to 65 I really feel like the engine is rapped out. I just don't have enough PATIENCE :) to drive 65 everywhere... :)

    Thanks,

    Jeff
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Well if ya do the swap I'd like first dibs on the bellhousing.[​IMG]

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  8. solowookie

    solowookie 1/2 ton status

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    Well I'm definately going to do a swap... I just have to decide which one.

    I've got to figure out exactly what it will take to do each swap, and then I'll save my pennies after I determine which direction I'm going. I'll post back to the board when I do the swap for anyone that wants the spare parts.

    Jeff
     
  9. dyeager535

    dyeager535 1 ton status Premium Member

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  10. solowookie

    solowookie 1/2 ton status

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    Man I would love to have the NV4500, but I'm seriously considering the Jet 700 right now. I saw it advertised by drivetrain warehouse for $1500.

    Now I've 2 options for about the same amount of money...
     
  11. solowookie

    solowookie 1/2 ton status

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    Wanted to post an update on this...

    Since I've put in my K&N, headers, and new exhaust this is a project that will happen, but I will put it on the back burner for awhile... (sorry, Wyoming term) [​IMG]

    This thing runs down the road the same speeds at such lower RPM's that it is very tolerable now...

    When I do the conversion I will go the the NV4500 option.

    <font color=blue> Jeff </font color=blue>

    [​IMG][​IMG]
     

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