ST-300 slipping?

Discussion in 'The "Juice Box"' started by holdfast, Jun 3, 2012.

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  1. holdfast

    holdfast Member

    I have a 65 Special with 300 and ST-300 that won't launch off the lights. I have been reading post on the forum about tor. converts and wanted to ask if anyone knew if this model year would have a high stall? Once you are moving the car goes but from still it won't even spin the tires. The motor is tuned very well and I am not able to capitalize on it at all.

    Would this car be set up to be this mellow as it is a 4 door? I am going to drain tranny/ change filter/ add lucas tranny fix and see. Thanks for input.
     
  2. DaWildcat

    DaWildcat Platinum Level Contributor

    Your 1965 ST300 should indeed have the variable pitch torque converter. If it feels lazy off the line, the high stall function may not be working properly. This can be due to problems with the electric switch beside the carburetor, external switch/trans wiring, internal trans wiring or solenoid, or simply a blown fuse.

    Do you have a 1965 Chassis Service Manual? If not, see http://www.65gs.com/65 Chassis Service Manual/1965 BUICK SPECIAL CHASSIS SERVICE MANUALindex.html .

    The ST300 section starts on page 196 and a description of the switch linkage is on page 226.

    Devon
     
  3. i highly doubt that your going to get a 4 door 65 Buick in stock form to light the tires up. the 2.73 gears along with the small cubic inches and a heavy 4 door don't make for a tire frying combination. I have a 2 door 67 special with 45 thousand miles on it and i cant do a burnout.
     
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Christopher,
    Just look on the driver's side of the transmission for the wires leading into the transmission, Pull the connector off and look for two prongs. Two prongs on a 65 means switch pitch. The prong that is horizontal is the stator connection. Pretty simple, apply 12 volts, high stall, take it away, low stall. You can even run a wire and simple switch. One side of the switch goes to 12 volts on the fuse box, the other goes to the transmission. You can even run a single wire from the battery positive (for testing purposes) to the horizontal prong, and listen for the stator solenoid (inside the transmission) to click when you touch the prong. With the transmission in gear, foot on the brake, you should see and feel the RPM rise when you select high stall.
     
  5. holdfast

    holdfast Member

    Great thanks - I will look at all the recommendations.
     

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