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Technical Torque converter

Discussion in 'Traditional Hot Rods' started by WP38, Sep 23, 2017.

  1. WP38
    Joined: Jan 23, 2015
    Posts: 268

    WP38
    Member

    I have a th350 conected to a stall converter. It has been runnung fine untill I put the pedal down and the 2nd gear kicked in
    Well it banged then started to make a weering noise if that is a word,
    The engine ( 305) runs .noise around the torque converter, Can't get any gear.
    I purchased used from a camaro Z28 1980. It was to have been rebuilt.
    Does this sound like a transmission issue? or a torque converter?
    I also have the kick down cable attached to the carb,
    Thanks for any suggestions as a starting point
     
    Last edited: Sep 23, 2017
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 59,920

    squirrel
    Member

    by "overdrive" do you mean "kickdown"?

    probably broke the intermediate overrun clutch race :)
     
  3. WP38
    Joined: Jan 23, 2015
    Posts: 268

    WP38
    Member

    yes kick down. That ****s sounds expensive, Might as well look for a 4 speed
     
  4. wwilliammc
    Joined: Dec 9, 2007
    Posts: 15

    wwilliammc
    Member

    Sounds like it striped the input shaft out of the forward clutch drum.
     
  5. Mike VV
    Joined: Sep 28, 2010
    Posts: 3,329

    Mike VV
    Member
    from SoCal

    WP - What's a "stall" converter ?

    ALL torque converters have a "stall" speed. Even stock/OEM converters have various "stall" speeds.
    Your problem could be many things, input shaft (the car will not move), pump hub, (will get worse), converter stator, (no torque multiplication), snap ring popping out of a drum, a few other things.

    In any case, the trans., needs to come out and be repaired..!

    Mike
     
    gimpyshotrods likes this.
  6. squirrel
    Joined: Sep 23, 2004
    Posts: 59,920

    squirrel
    Member

    A "stall" converter is a torque converter with higher that stock stall speed, of course.
     
    Truckdoctor Andy likes this.
  7. Not to me .
    Never saw it happen...Least of all with a mild 305.

    Depends on what kind of a "stall" someone built. If it has the the stock, cast, riveted in turbine hub, I've seen them break. Then you have no input drive, = no gears, forward or reverse.
     
    Last edited: Sep 24, 2017
    gimpyshotrods likes this.
  8. WP38
    Joined: Jan 23, 2015
    Posts: 268

    WP38
    Member

    Thanks for the help looks like a winter project. It ran so well in all gears until I gave her the gas LOL. better to brake down on my street, than a distance away,
    Would the 700R transmission be a direct replacement? Or would the drive shaft need to be reworked? Im only using truck for pleasure not racing,
     
    Last edited: Sep 24, 2017
    Hudson31 likes this.
  9. Mike VV
    Joined: Sep 28, 2010
    Posts: 3,329

    Mike VV
    Member
    from SoCal

    squirrel wrote -
    A "stall" converter is a torque converter with higher that stock stall speed, of course.

    What's a "stock" stall speed " ?
    All of the car manufacturers have different stall speeds for different combinations of cars/trucks and engines..!
    What do you call the old GM, "Switch Pitch" converter..."Stalls" or "Two Stall", or Twin Stall" converter ?

    Peace...

    Mike
     
  10. squirrel
    Joined: Sep 23, 2004
    Posts: 59,920

    squirrel
    Member

    The point I was tying to make is that you might be getting a bit too finicky about the words people use. When someone says that a car has a cam, or has a stall converter, that just means that it's not stock, it's been modified. Of course it doesn't tell you much useful info about that modified part, only that something has been done. Most folks who talk that way don't really know what they're talking about, so it doesn't really matter what they say, does it? :)

    But if a guy says his car has a 4500 stall converter, you know he's serious about his BSing.

    The switch pitch converter in my Chevy II, I just say it's a switch pitch, and if they sound interested, I let them know what the low and high stall speeds are, and if they want to know more, I keep going and explain how it all works, etc. I like to tailor my explanation to my audience.
     
  11. There's a lot said in that sentence.
     
    ClayMart and 325w like this.
  12. ClayMart
    Joined: Oct 26, 2007
    Posts: 7,793

    ClayMart
    Member

    One of those rare people who feels that words are too valuable to waste. ;)
     
  13. WP38
    Joined: Jan 23, 2015
    Posts: 268

    WP38
    Member

    Guys would you know of a direct replacement for a th350 only one with a overdrive.
    Thanks I was told my torque converter was a 1400 stall with a shift kit in transmission .
    Out of a z28 Camero 1980 approx . It did have a nice hard shift. Cheers
     
  14. The 200 and 700 o.d.'s are both the same length as a short T350. In both cases, the mount has to be moved back.
    Plus you MUST deal with the TV cable in a correct manor. Probably should hook up the converter lock up too.
    You'll have to decide whether it's all worth it to you.
    BTW , what made you think you had a "stall" converter?
     
  15. ClayMart
    Joined: Oct 26, 2007
    Posts: 7,793

    ClayMart
    Member

    There isn't a TH350 with overdrive, as such. But there is a TH350-C trans that has a lock-up torque converter. Late '70s to mid '80s? usage. The trans might be marked with the GM option code "MV4" and there's a couple extra electrical terminals that p*** thru the trans case to operate the converter clutch. Fairly simple to wire up like stock if you can get a few extra pieces from the donor car. Or operate it with a simple toggle switch.
     
  16. Yes, 350C would be an option, but you would want an 81 or newer. 1980 had a weird vacuum or throttle pressure lock up.
    Anyway, I think the o/p was wanting another GM trans that would install with a minimum of h***le.
    Of course that all depends on his skill level or wallet size.
    If we knew more about the vehicle and it's intended usage, we could make a better call.
     
  17. WP38
    Joined: Jan 23, 2015
    Posts: 268

    WP38
    Member

    I have a 1938 international on a 1948 Merc frame.
    Built myself. I was thinking if I had to replace the used one I purchased I my as well get one with a forth or 5 speed. Most
    Likely change engine to a
    350 . Just a driver little hot rod IMG_3122.jpg IMG_3106.jpg



    Sent from my iPhone using The H.A.M.B. mobile app
     

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