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TH350 vs SM465

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bigmack, Feb 11, 2002.

  1. bigmack

    bigmack 1/2 ton status

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    Just looking for opinions. Heres my situation, my truck has a TH350 that finally ran its last mile yesterday. Everyone tells me that I should put a 4-speed in it & forget about the rebuilding the automatic. I have a friend that has a transmission, t-case, pedals, etc. Everything I would need to change over, but I don't know if its worth the trouble. What do you guys think ?

    '80 K10 350/350/NP205/14B/10B/4.10/4"Lift/Q78-Buckshots
     
  2. Big_B_Murphy

    Big_B_Murphy 1/2 ton status

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    I am in the process of swapping my TH700 for a SM465. So you can figure out what I am going to recommend. If you have access to all of the stuff to do the conversion, by all means do it. The hardest part of the swap is locating all of the parts. I am doing it for the second time. The first was replacing a TH350 in a 77K10. Now it is in an 85 K5.
    You are probably going to spend about the same amount of money either way. I could've gotten a th350 rebuilt for about the same as I will spend to convert to stick (New clutch, PP, throwout bearing, flywheel,pilot bushing and driveshaft mods), but the 465/205 combo I am putting in is nearly indestructable.

    The bottom line is if yoiu like shifting convert.
    Is you like mashing the pedal and going, stay with an Auto

    <font color=red> It is just as much fun to build it as it is to bash it</font color=red>
     
  3. bigmack

    bigmack 1/2 ton status

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    TTT

    '80 K10 350/350/NP205/14B/10B/4.10/4"Lift/Q78-Buckshots
     
  4. TXsizeK5

    TXsizeK5 1/2 ton status

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    I am thinking of switching from my sm465 to Auto Th350 or 400 just for convenience... the only complaint i have for the sm465 is that its throws are hella long. Other than that, its great. I love downshifting from 3rd to 2nd and hearing those flows =)


    87 Custom Deluxe
    305/Sm465/ NP208
    4.56 , 35" BFG Muds, CatCo Cat & Series 40 delta flow 3" tips.
    6"Springs, Tranny, & Engine coming soon.
     
  5. BurbinOR

    BurbinOR 3/4 ton status

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    <font color=blue>Ah, another 'religious' topic [​IMG]............all depends on what you like. Me, juice trannies all the way..............[​IMG]. I've had T350's in 4 different K5's and they are very tough............if you like a stick I'd go for an NV4500, and get the overdrive as well as the low first. Also depends on what you run............for me, sand is the primary venue, auto's are a heckuva lot easier to shift, not to mention quicker. Rock crawling............maybe that low 1st gear of the 465 is better, don't know, with the 2.52 1st gear of a T350 and the torque converter multiplication it's close enough, at least for me.

    Put a manual shift kit in a T350 and have fun............</font color=blue>

    ONE TON</font color=blue> <font color=green>TPI'd</font color=green><font color=red> BEAST<font color=red>
     
  6. kickinasphalt383

    kickinasphalt383 1/2 ton status

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    I too just switched my TH400 out for an SM465. I love it, so far. It crawls up anything and everything, its great! Although, In the mud an auto is alot easier to deal with. I live in Michigan though and 90% or more of my off-roading is in the mud but I still love it and would never switch back... and again its BOMBPROOF
     
  7. burbBoy

    burbBoy 1/2 ton status

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    I for one think it was well worth my trouble....The hardest part of the whole swap was getting that damn clutch sled in. I did the swap here in Michigan for around $250. I found a good used flywheel and pressure plate from the bone yard when i picked up the tranny and t-case. I love the that granny gear......Especially in a Burban ;)

    Brian
    82 Burban, 38.5's, 6" lift, SM465/NP205, 10 bolt/14 bolt
     
  8. bigmack

    bigmack 1/2 ton status

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    Thanks for all the info. I guess it's decission time !

    '80 K10 350/350/NP205/14B/10B/4.10/4"Lift/Q78-Buckshots
     

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