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Sm465/205 question(s)

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dyeager535, May 17, 2001.

  1. dyeager535

    dyeager535 1 ton status Premium Member

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    Wow...me "complaining" about the SM465! haha

    Only two complaints I have about this combo. Used new gaskets for the adapter between the t-case and transmission. Transmission side seems to be the only one leaking, but it won't stop. Nothing major (haven't filled it in months) but I'm sure its leaving a spot here and there. I toghtened the bolts up already once (they had gotten a tad loose) but that didn't stop it. Curious if this is just one of those "never going to stop" kinda leaks, or if there is a better way to seal it than the fiber (not cork, not rubber) gasket I used there. I was thinking of unbolting it from the crossmember, just so I could make sure the bolts were pulling the adapter as tight as they could, but if its an inherent "problem" I won't bother.

    Other thing is that sometimes it won't go into 1st or 2nd. As in clutch thouroughly depressed, vehicle idling, I move the stick to 1st, and it kinda just hits something and stops. Move to second at idle, same thing. I just get a little more forceful, and it goes in. Its only once in awhile though, I was hoping maybe it would work itself out, since the tranny sat for so long, but not the case. It's definitely not gears, as it won't let me even get to meshing them before it stops. My dads does similar, it feels like it goes into gear, but it actually stops short, so you aren't really in gear, but you don't know until you let out the clutch.

    I know I'm being a bit picky, but I like my stuff to work as good as possible!

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  2. xtreme_wlr

    xtreme_wlr 1/2 ton status

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    My sm465 has the same sort of leak that wont go away. Get some dirt on it and you wont even notice :). As for the clutch, have you tried adjusting the push rod that goes into the clutch fork? It sounds like the clutch might be worn a little and just needs the "slack" taken out of it.

    '78 Chevy 1 ton Stepside RockCrawler
    468 BB, SM465, NP205
    D60 front, GM 14Bolt rear w/ Detroit
    <A target="_blank" HREF=http://65.11.18.114>http://65.11.18.114</A>
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Gotta love the hydraulic clutch, don't have to worry about adjusting for wear. I know its not that the clutch isn't all the way in, or I'd be grinding the gears...it's just binding before it gets far enough to mesh them...my dads is the same way, but both are trannies are old and used, so it could be a wear point in them, but not sure where. He can take his top cover off easily, since his tranny tunnel unbolts, on mine I'd have to drop the tranny, which I won't do for just this problem. Wish I would have had the money to have it freshened up when I had it out.

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    mine leakes in the same place and is a common problem lol mine also dose the shifting thing to what i do is put it in ger and then slowly let the clutch out while pulling or pushing it until it goes all the way in gear[​IMG]

    77blazer see it at<A target="_blank" HREF=http://community.webshots.com/user/ssmith6333>http://community.webshots.com/user/ssmith6333</A>[​IMG]
     
  5. Roostr84

    Roostr84 1/2 ton status

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  6. dyeager535

    dyeager535 1 ton status Premium Member

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    Join the Olds G-body listm the chassis list, and the 73-87 chev truck mailing list to keep up with me : )

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  7. fad2blk99

    fad2blk99 1/2 ton status

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    I got your same set up, hyd clutch and all. My symptoms are exactly the same from the leak to the not wanting to go into 1st and 2nd. What I was told about the gears is that 1st (or low) and 2nd are not syncronized. Also 1st (low) is not made to be the primary starting gear w/ a 6.5:1 ratio, so expect less than spectacular results if you use it constantly like I do. I got stock 3.08 gears and 35's so I have to use 1st or smoke the clucth. -Tommy
    ps. I wouldn't bother chasing down those small leaks unless your having add fluid too often. I can't remeber seeing one that didn't leak.
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

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    Low gear I can see being hard to get in, but even then, going too fast, or not putting the tranny into 1st or second before going to low, low gear grinds. On mine, in 1st or second, I can't get it to even grind. Just "stops" before the shift forks (I assume) push the gears far enough.I hardly ever use low, even with 33's and he 3.42's I use 1st on almost all takeoffs, except super steep hills, and even then, you almost come to a stop when you try and shift from low to first lol. You could always use the t-case to double your gears, so you could ignore low and just put the t-case in low, go through 1-2-3, then shift t-case to 2hi : ) Not sure if the 205 will come out of 4hi when you are moving "fast" though, never tried.

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  9. tom

    tom 1/2 ton status

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    I have both a sub and a blazer with sm465's and neither has any leaks - both have between 160K and 170K miles. Have had the problem of getting into first gear with both of them and both were cured by bleeding the hydraulic clutch and keeping the resevoir filled. Somehow, just a little bit of clutch drag can keep mine from engaging easily. Maybe the synchro's are just that strong. As for getting into granny low, those are just beefy gears and if they stop tooth to tooth, they won't shift. I have to just ease the clutch out a scosh and them depress it again and they slip in easy. Or, you can slip it into third or fourth and then go back to first and it usually works. You gotta love that tranny even though it takes a little extra technique at times.
     
  10. michaelm

    michaelm 1/2 ton status

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    your shifting sounds typical of truck tranny dont sweat it you will get used to that. got the same leaks, am wondering if the thin non stock gasket is preventing full adapter contact, or if retainer clip from rebuild kit is thicker then factory and preventing good seal.

    while i am here, i have 2 sm465s both with output splines worn ugly. on the last install i decided to coat coupler with grease. anyone experience worn output splines? kinda sucks as i have no idea what a new mainshaft would cost or where to get one and i need 2.
     
  11. nyyef

    nyyef 1/2 ton status

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    same thing here. on both my blazers. i just let the clutch out just a hair and it slides right in. as for the granny low, as someone mentioned, it is not syncronized. but if you want to downshift to 1st, just blip the throttle to bring the rpms up. this way the gears will be running at the same speed allowing for the down shift (kinda like clutchless shifting).
    this is normal. just remember the beefier the tranny the harder the shifts. and the 465 is just about as beefy as it gets

    Knife.
    knife.coloradok5.com
     

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