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Brainstorming on manuals

Discussion in 'The Garage' started by neverendingproject, Mar 26, 2006.

  1. neverendingproject

    neverendingproject 1/2 ton status

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    As the name states, and my continuing quest to make the blazer a neverendingproject, I've thought of something.

    Im wanting to do a manual swap, and heres the problem.

    1. I need a tranny with a 32 spline output. (could get adapters)
    2. It need to bolt up to my SBC (could get adapters)
    3. I would like 6 speed but would do with 5
    4. My 383 is balanced. How to I change it to a flywheel from a flexplate without having to balance the entire rotating assymbly?

    So, brotherhood. What are my options?
     
  2. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    I know most of the SM465 is a 32 spline output that will obviously bolt to a sbc, but it is a 4 speed. I'm not sure what the output is on the NV4500, but it an option.
     
  3. 79k20350

    79k20350 3/4 ton status

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    nv 4500 os 32 spline, thats a 5 speed tranny. sm465's are almost all 10 spline (at least the ones you can find) i was lucky enough to get a 32 spline 465/ 205 combo. Uve heard real bad things about the nv5600 6 speed and that wouldnt be a direct swap like the 4500 would be. the 4500 has a granny low the first 2 years it was produced. id get a early model 4500 rebuild it and fix the fifth gear issue.
     
  4. sweetk30

    sweetk30 professional hooker Premium Member

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    ya thay have big parts and life problems with the 5600s and neat little info the 2x4 gm fixed yokes dont have the 5th gear nut problem as all the rest. its a sandwich with the yoke nut holding it all on. i am using one with a divorced 205 my self.
     
  5. neverendingproject

    neverendingproject 1/2 ton status

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    So I guess I will have to find a 4500 huh?
     
  6. 79k20350

    79k20350 3/4 ton status

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    thats what id do if i were you. 4500 either 2wd and divorced or 4wd and redrill a 203 for a doubler or slap on a 32 spline 205
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    A lot of the GM 4wd version NV4500's have a vibration dampner between 5th gear and the nut...which isolates the nut just like the yoke on a 2wd version would. The nut is only a big deal to swap if you tow very heavy loads and or have major input torque (CTD or 6.5TD)

    Rene
     
  8. neverendingproject

    neverendingproject 1/2 ton status

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    I can get a 2wd dodge unit for next to nothing. How hard would it be to change the output shaft and take off the tail housing to work, or is it not that simple?
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    It's not just an output shaft, it's the entire mainshaft. Easier to go with a divorced set-up IMO.

    Rene
     
  10. neverendingproject

    neverendingproject 1/2 ton status

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    I dont think that my blazer will like the divorced setup. Im going with a 241 anyways.
     
  11. neverendingproject

    neverendingproject 1/2 ton status

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    Also, anyone have input on the engine situtaion, and what do I do about the stroker?
     
  12. 3 on the tree

    3 on the tree 1/2 ton status

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    I think all you would have to do is have a flywheel balanced to match the flexplate, and make sure the crank is drilled for a pilot bushing.
     
  13. neverendingproject

    neverendingproject 1/2 ton status

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    Is that like the 1 inch hole in the back of the crank?
     
  14. 3 on the tree

    3 on the tree 1/2 ton status

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    that's the one.
     
  15. neverendingproject

    neverendingproject 1/2 ton status

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    So what about this. New bell hosing, mainshaft, output swapped into the dodge case? I think it would still be cheaper than finding a gm one or buying one.
     
  16. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Need an output housing as well, and if it has the larger (1 3/8"?) dodge input you'll need to swap the GM 1 1/8" inout shaft as well.

    Rene
     
  17. neverendingproject

    neverendingproject 1/2 ton status

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    This would still be cheaper, yes?

    Im having a hard time finding technical info on the 4500. All I find is places selling whole parts or stricktly dodge stuff.
     
  18. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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  19. neverendingproject

    neverendingproject 1/2 ton status

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    I talked to the guy and he said I need to replace the input shaft, front bearing retainer, output shaft, fifth gear, fifth gear nut, and tailshaft housing. I will also need either the GM fifth gear spacer or damper.

    Geez, I hope its cheaper
     
  20. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I completely rebuilt mine, including new input shaft/gear, new countershaft, 3/4 synchro hub, 3/4 synchro rings, 5th gear synchro ring, 5th gear synchro hub, new nut, all new bearings, all new seals, small parts kit for just under $900 US.

    My 4500 was free to me as a basket case though, so still worth it and I know exactly what it's condition is.

    With the new bellhousing I'll be into it for about $1300 US.

    I saw an NV4500 in the for sale forum for $1600 obo...including bell and shifter.

    I think you'll need to get that tranny pretty much for free to be worth it, and even then it'll be close.

    Rene
     

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