Announcement

Collapse
No announcement yet.

Downshifting problems

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Transmission / Overdrive: Downshifting problems

    I have a 1961 Hawk with a 3 speed trans. with overdrive. When I downshift from 3rd to 2nd gear it doesn't slow the car down at all. When shifting up through the gears everything works fine and the clutch works as it should. Any thoughts or suggestions would be greatly appreciated because I am out of ideas. Thanks in advance.

  • #2
    Originally posted by tzenewiczsr View Post
    I have a 1961 Hawk with a 3 speed trans. with overdrive. When I downshift from 3rd to 2nd gear it doesn't slow the car down at all. When shifting up through the gears everything works fine and the clutch works as it should. Any thoughts or suggestions would be greatly appreciated because I am out of ideas. Thanks in advance.
    I believe that OD transmission was meant for economy. As such it was designed to "freewheels" and not bog the car down when you decelerate.

    From this web site => https://www.fordification.com/tech/overdrive.htm

    "When the OD cable IS pushed in, the first operating feature of the B-W OD transmission becomes apparent it “freewheels”. This means that while the engine can drive the wheels, when the vehicle coasts, no power is fed back to the engine. No engine braking, just coasting."

    From this website => https://fifthaveinternetgarage.blogs...verdrives.html

    "While you are in overdrive if you back off the gas you will feel engine braking in both second and third gear. Because the transmission is still in overdrive, the engine braking is not as strong as if the transmission were in 2nd or 3rd direct drive but the transmission does not coast. If the transmission does coast, the overdrive transmission is not operating properly."

    http://www.studebakerclubs.com/North.../Overdrive.pdf
    Last edited by SScopelli; 05-07-2019, 07:43 AM.

    Comment


    • #3
      It should not "Freewheel" until your speed drops below about 25-30 MPH when in O.D.

      But, you should feel some deceleration above that speed even in 3rd. but of course it is very slight in Overdrive 3rd. much more noticeable in 2nd.

      When you REALLY need to decelerate like just before reaching the top of a steep hill, you floor the accelerator to go into Direct, pull the O.D. Handle out then release the Pedal and it will decelerate normally in Direct drive.
      This is usually done in High gear but will also work in 2nd. if your speed is lower.

      The Overdrive only works as it should if a Kickdown switch and Cable Control are installed as a Factory setup. Some Cars that have been converted only partially, from a Standard 3 speed may not have either.
      Last edited by StudeRich; 05-07-2019, 12:33 PM.
      StudeRich
      Second Generation Stude Driver,
      Proud '54 Starliner Owner

      Comment


      • #4
        Old timers with loads of miles under their feet never downshifted with a standard tranny, especially so with OD. Save the clutch and use the brakes. If you need to pass, kickdown in 3rd/OD....related by an old truck driver.....

        Comment


        • #5
          Originally posted by jackb View Post
          Old timers with loads of miles under their feet never downshifted with a standard tranny, especially so with OD. Save the clutch and use the brakes. If you need to pass, kickdown in 3rd/OD....related by an old truck driver.....
          Reminds me of my father saying that brakes are cheaper than clutches or transmissions.
          Gary L.
          Wappinger, NY

          SDC member since 1968
          Studebaker enthusiast much longer

          Comment


          • #6
            Originally posted by jackb View Post
            Old timers with loads of miles under their feet never downshifted with a standard tranny, especially so with OD. Save the clutch and use the brakes. If you need to pass, kickdown in 3rd/OD....related by an old truck driver.....
            Originally posted by studegary View Post
            Reminds me of my father saying that brakes are cheaper than clutches or transmissions.
            Exactly! Brake shoes are far easier to replace too.

            Comment


            • #7
              Of course, if you match your revs properly, downshifting does not "wear" the clutch. It only wears when it slips. Admittedly, the throwout bearing might get a little more time on it.
              Gord Richmond, within Weasel range of the Alberta Badlands

              Comment


              • #8
                Thanks everyone for the replies. I appreciate the good info. and I think y'all got me on the right path.

                Comment

                Working...
                X