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sm465+np205

Discussion in 'The Garage' started by the general, Sep 22, 2006.

  1. the general

    the general Registered Member

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    :bow: i,m thinking of buying this complete combo ,what are the things i have too look after (the weak spots) i now have the th350+np203 parttime combo it makes about 2500 rpm, by 60 miles an hour. now will the rpm,s go down or up ? iv,e got 4.88 diffs(ARB) and 38.5x14.5x15 inch Super Swampers under the car.:confused:

    Patrick . The Netherlands.
     
  2. RootBreaker

    RootBreaker 3/4 ton status Premium Member

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    both transmissions you are listing have 1:1 ratio (no overdrive) so should be the same.... you are talking a stick vs auto not a stick vs od auto or anything.. so the only benefit is no tranny fluid to deal with, manual trans for some of us means more control (i love mine)

    if you are converting to a smc465.. go hydraulic clutch... ALL THE WAY!!!!! so cheap and sooooo much nicer on the left leg :haha:
     
  3. MattK

    MattK 1/2 ton status

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    unless he's got a lockup converter right now, it's possible that he'll drop a small amount of rpms at cruise.

    be ready to do some real searchin if you go hydro though. im about 2-3 months into my search and im still short a bellhousing.
     
  4. the general

    the general Registered Member

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    do i have too redrill the frame and do i need to chance the driveshafts or not? i now have a standard yoke on the front(1310?) a a at the rear a 1350(will this fit on the np205?) in my opinion a hydrailic clutch is good but it can also leak a that can cost you a clutchdisk. i think the less there is on the less there will break ! and i will take the heavier clutching.
     
  5. big dan

    big dan 1/2 ton status Premium Member

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    another problem with the mechanical clutch is when you get it twisted up you cant push the pedal in. I know guys that have started climbing stuff and got about half way up and tried to clutch but the linkage was so twisted that they couldnt and just had to hold on and drive through it. some of them rolled and broke stuff cause they couldnt control it.
     
  6. MattK

    MattK 1/2 ton status

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    my th350/np203 crossmember worked just fine, same location for the sm465/np205.

    driveshafts will need to be changed though. i've got roughly 4-5" of lift...the rear shaft needed to be about 6.5" longer (new shaft measures 41.5" yoke center to yoke center). and the front is needing to be shortened around 2".
     
  7. koldsimer

    koldsimer 1/2 ton status GMOTM Winner

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    As far as weak spots go, there's not much to go wrong in either of them. I have heard of some people breaking the adapter sleeve between the two but that could probably be attributed to a worn adapter/splines. Just look inside of one and you can see how beefy it is. I swapped to the 465/205 because I was tired of burning up 350's and I hated the 203 case. I beat my truck fairly hard and the combo hasn't so much as whimpered!
     
  8. MattK

    MattK 1/2 ton status

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    i can attest to koldsimer floggin on his blazer.:haha:

    me and thomas were talkin the other day how it seems your rig is never down lol
     
  9. koldsimer

    koldsimer 1/2 ton status GMOTM Winner

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    I've been pretty damn lucky, huh?
     
  10. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

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    Be careful when you buy a hydro clutch setup. When I got mine the Aluminum bell housing was cracked in two places,and I had it welded up. I just pulled the trans again this weekend it get the trans rebuilt and replace the adapter that I cracked some how only to find the bell housing cracked in two places again.:doah:
     
  11. raymos

    raymos Who?

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    i did this swap a couple of months ago and i wish i would have done the hydro. clutch. its not the pedal pressure, its the linkage that has been giving me problems. I would recomend hydro. if you can find the stuff you need.
     
  12. supersize75k5

    supersize75k5 OrganDonorRacing.com

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    go hydro


    option 1 buy the novaqc set up to get most your parts, allows you to keep your case that is a non hydro case, just a fancy adapter and a gm style slave,


    option 2

    build an adapter., real simple and use a will wood master with a cnc slave that mounts easier than the factory style
     
  13. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

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    I am by no means saying hydro is bad I was just warning to check the buy the aluminum bell housing.
     
  14. the general

    the general Registered Member

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    yep, thats the problem here in The Netherlands too find the right stuff. here they have nothing for those cars and the specialists are not that good!! 350 dollars is that much for the hole complete combo(its out of a 77 blazer)?
     
  15. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

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    If in good working order I would say that is a good price.
     

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