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manual tranny.

Discussion in 'The Garage' started by eightyone, Apr 7, 2005.

  1. eightyone

    eightyone 1/2 ton status

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    im looking into swaping a 5 or 6 speed tranny into my 87 automatic suburban, i have done auto to maunal swaps before. so my question is with the tranny. whats a good 5 or 6 speed with a low first gear that will bolt up to my 350, and what type of truck would i find one in. and also, will my np208 bolt up, or should i grab the transfercase out of the same truck. thanks.
     
  2. pvfjr

    pvfjr 1/2 ton status

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    Well if you want something that would fit easily and cheaply, you'd end up having to go with a 4 speed - like the SM465. If you have to have a 5 speed, you could get a NV4500, but that would be more expensive.
     
  3. eightyone

    eightyone 1/2 ton status

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    thanks, i have a few 465's at my house, im really lookin for a 5 speed, maybee even a six. cuz this is for hiway cruisin, im tryin to keep the rpms down. what would a find a 4500 out of?
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    If solely for highway cruising, just run extremely low numerical gears. 465 with 2.73's would cruise fine, especially if the speed is kept down.

    You lose compression braking and towing ability, but if you just want to cruise the highway, no cheaper way especally since you have the 465 already.
     
  5. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    5 speed-NV4500 6 speed-NV5600
     
  6. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    a nv4500 from a 88-on chevy truck. a sm465 bellhousind should bolt up to it, as well as a 32 spline 208/241 (th400 or 465 version) you may have to change driveshafts, not sure though.
     
  7. eightyone

    eightyone 1/2 ton status

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    thnaks, thats what i was lookin for.
     
  8. stizkidz

    stizkidz 1/2 ton status

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    Under what applications would you find the 6 speed trans? Can an NP205 be made to bolt to an NV4500?
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The NV5600 is a dodge tranny. The GM's and Fords use the ZF 650-S6 6 speed. IIRC in the GM trucks it was the 3/4ton and one tons with either the 8.1 or D-max that got them, 2001 and newer.

    Getting a 205 bolted up to that or the NV4500 should be doable. They'd have the generic round 6 bolt T-case adaptor and a 32 spline output. ORD and NWF both can modify your existing 205 if it's the figure 8 pattern, and both can bore the case for the larger bearing'd 32 spline input bearing.

    Rene
     
  10. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    I belive 2001 on up has the 5600, with a Cummins. A 4500 would suffice, the 5600 just has an even lower 1st gear (Low gear, whatever). Advance Adapters also sells the whole kit to mate a 205 to any 4500, thats what I used. Chev or Dodge, its jsut easier if you get a Chev 4500 because then you dont need to change the input.
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Actually the 5600 and the ZF 6 speed have 2-5th much closer together ratio wise. First is a granny gear and 6th is overdrive. They're ideal for a diesel application. The NV4500 is a nice tranny but it's still a wide ratio, with the only real benefit being the overdrive (which is a nice benefit)

    Rene
     
  12. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Intresting, ive heard the same complaint about the 4500 having 3rd and 4th too wide. I dont notice a problem, but I dont have a diesel either, but then again, neither did they. lol.
     
  13. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The NV4500 has the gear splits almost identical to the SM465. ~3.5, 1.7, and 1:1. The 5600 and ZF 6 speed are ~3.4, 2.2, 1.4, and 1 (excluding granny and overdrive)

    Both the SM465 and NV4500 will drop rpm's by close to 50% each shift. Not normally a nig deal, but if you are towing it can really become an issue.

    Rene
     
  14. 84gmcjimmy

    84gmcjimmy 1 ton status

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    Sorry for the dumb question, does the nv4500 have the really low first gear like the 465? I know someone posted the gear ratios, but I still don't understand that stuff too well. I wouldn't mind overdrive if gas prices keep gaining. It's around 95 cents a litre here right now (averaged)
    Soemone said they first came in 1988? Is it possible to have a hydro clutch for it?
     
  15. Zeitler

    Zeitler Registered Member

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    the early NV4500 has a 6.34:1 low gear , later versions has 5.61:1
     
  16. PhoenixZorn

    PhoenixZorn 1/2 ton status

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    What's the low gear ratio for a 465? I always wanted to know... and thanks for giving the ratios for 1-3... =) Also, is the ratio on a 208 2:1 or 1.9:1?? I've heard both, but no confirmation either way.
     
  17. Jeromy Gibson

    Jeromy Gibson 1/2 ton status

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    465 if i remember is 6.55
    a 208 if I remember is 2.72 or close to it
     
  18. Zeitler

    Zeitler Registered Member

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    naah :

    NP203 (2.01:1 Low Range)

    NP205 (1.96:1 Low Range)


    NP208 (2.61:1 Low Range)

    NP241 (2.72:1 Low Range)

    :waytogo:
     
  19. PhoenixZorn

    PhoenixZorn 1/2 ton status

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    So... other than being newer than the 205 and 203, are there any bennies or banes to the 208?? Is it as strong as the 2 previous cases, or is it a PoS?
     
  20. k20

    k20 3/4 ton status

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    the 208 is an aluminum case chain drive, the 205 & 203 are both cast iron cases, the 205 being gear driven, and the 203 chain. The 205 is the strongest, the 203 is 2nd, and the 208 is the weakest of the 3. That being said, I havent had any probs with my 208 behind my th400, though the th400 has bit the dust 3 times.....
     

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