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    T10 woes. I welcome any assistance.

    Hello

    Getting distraught now.....:-)

    Hope someone can help

    So to start. 65 GT Fastback, 289/T10 4 speed

    Car drove impeccably and shifted perfect. Maybe in the top 5% of all of them in comparison. I sell these cars so drive a lot of them

    BUT, was popping out of gear while driving, Not during accel or decel. Just while driving. Otherwise I would have taken that shifting action all day long on any cars I have owed or do own currently.

    So it was suggested either the detents on the back of the cover were worn or a rebuild was needed

    I ordered a rebuild kit.

    Trans was opened and the detents were perfect on the reverse of the cover. Solid and held excellent when moved

    Internals of the trans looked near new. No difference between old syncro rings and new. Not a mark on them.

    So new syncros installed, New needle bearings installed on layshaft. (couldn't use bearings as they were wrong size in the Kit )

    NOTE: shift forks heavily worn!!!

    So bought new shift forks, They are considerably wider than old forks (in the non worn area) When installed the bench the gearbox would stick in gear and not come out of gear. 3rd gear I believe. This was on the bench not in the car. Put the old forks back in and the box operated fine on the bench

    This part will get me in trouble. Reinstalled old shift forks, installed box in the car.

    So the driving experience. VERY notchy, I mean horrendous. If you are very deliberate shifting and after the 1st and 2nd shift you let the gear stick self-center you can get into third and forth. But if you drive like any normal person and don't give a 2 second wait after second it either sticks in second or sticks in third and jambs up. If it sticks in second you get a nasty release noise and it pops out and you can shift again, If you shift at any fast rate the gear knob wont go into third or sticks heavily in 2nd

    Feel free to abuse me for not having the guy sort the shift forks

    Any other suggestions? Do you think it is the shift forks? Something internal in the trans? or the older slightly worn action of the shifter?

    Any suggestions most appreciated. Reminder, This box shifted perfectly (aside from popping out of gear) before my guy worked on it.

    Cheers. Peter
    Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
    We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

    #2
    Clutch freeing off OK? Sticking in gear or resisting going into gear often a clutch release issue. Unlikely to be shifter, if not clutch then gearbox internal issue. Never had one pop out during driving, few options there: Shifter, synchros, worn forks etc. Hope you sort it.
    Cheers, Martin
    sigpic

    Comment


      #3
      The bearings and selectors were wrong in the kit. I think I'd have a really good look at those synchros.

      As Martin said it could be the clutch, but it;s unlikely you hung the weight of it on the disc if you left the bell on?

      Comment


        #4
        Hello Folks

        Bell was left on, these guys install trans for us regularly

        She popped out before and now after rebuild

        Cheers Peter
        Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
        We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

        Comment


          #5
          Hi Peter, did a little trawling on the Internet and came across this. If it's useful, great. If not, at least I tried. Good luck.

          https://www.hotrod.com/articles/t-10...tter-than-new/

          This bit in particular maybe?

          "Shifter forks slide into the slots for the two sliders. Make sure the pads on the shifter forks arenít worn. If they are, they wonít push the sliders fully into place when you shift gears and the transmission can pop back out of gear."


          Last edited by mick the hat; 06-07-2019, 11:26 PM.
          . Cars, photos, wine. What else is there?

          Comment


            #6
            Didn't load properly on last post?
            Last edited by mick the hat; 06-07-2019, 11:28 PM.
            . Cars, photos, wine. What else is there?

            Comment


              #7
              Thanks Mick, that is our first port of call. I have not one clue why the new fork are wider than the unworn portion of the original forks. I am going to get the new forks machined as soon as I find out why they are wider/thicker on the wear area than the originals.

              Cheers. Peter
              Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
              We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

              Comment


                #8
                So an update. I had another guy look at it and his feeling was that the shifter mechanism was worn out. It was fairly loose, levers rattled around a bit.


                So today I swapped the shifter base for a very good used unit
                Nice and tight

                Immediately the shifting action felt awesome. Took the car for a ride and probably went five miles without an issue. Full acelleration1-2-3-4 shifting, fast, slow. Excellent

                Then slowed down and shifted into second and would not go in, then went in and wouldn't come out. It finally came out and performed perfect again

                I then had a friend drive the car. Maybe five 1-2-3-4 shifts then it did the same thing, either wouldn't go in 2nd gear or stuck in 2nd gear. Then Bang, comes out of 2nd and shifts fine again


                Last edited by pmustang; 09-07-2019, 07:35 PM.
                Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
                We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

                Comment


                  #9
                  Anything further on this Peter?
                  . Cars, photos, wine. What else is there?

                  Comment


                    #10
                    Yes sir, thanks for asking

                    Put the car on the ramp, ran it and gt the trans stuck

                    Last week I removed the trans and shifter complete, installed the box on an engine stand and confirmed it was stuck. Removed the shift rods to isolate the trans and moved shifter, shifter was free moving, this confirmed trans has an internal issue

                    Trans is now wth rebuilder for investgation

                    I have researched the heck out of this and short of stuck synchos being a possibility I am as lost now as before


                    Cheers. Peter



                    Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
                    We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

                    Comment


                      #11
                      Originally posted by pmustang View Post
                      Yes sir, thanks for asking

                      Put the car on the ramp, ran it and gt the trans stuck

                      Last week I removed the trans and shifter complete, installed the box on an engine stand and confirmed it was stuck. Removed the shift rods to isolate the trans and moved shifter, shifter was free moving, this confirmed trans has an internal issue

                      Trans is now wth rebuilder for investgation

                      I have researched the heck out of this and short of stuck synchos being a possibility I am as lost now as before


                      Cheers. Peter


                      I wonder if it was ever rebuilt by a "specialist" and the steel bearings in the races were replaced properly? Did any get lost and replaced wth incorrect sizes.... or not at all? Just a thought. Sometimes it only takes one or two to be less than perfect for problems to start.
                      . Cars, photos, wine. What else is there?

                      Comment


                        #12
                        Now been apart twice

                        Initially before rebuild it appeared near perfect inside and shifted perfectly with only issue being popping out of gear
                        Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
                        We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

                        Comment


                          #13
                          Gave up:

                          ​​​​​​Maybe not the answer you want to hear but I have thrown in the towel

                          I spoke to many folks, I tried several ideas (last being the lapping of the syncros onto the gear cones) changed the shifter mechanism, new clutch, still CRAP

                          I mean garbage. Stuck in 2nd, stuck in 3rd, then can't get a gear. nightmare

                          God knows the hours and money lost at this point so pulled another T10 from another car (and a toploader went into that car) so the car gets a known good T10

                          I don't know if it was the new syncros, the assembly, who knows...just at a total loss of time, money and energy expended to sort the issue
                          Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
                          We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

                          Comment


                            #14
                            Let me offer you some succour Peter. Life is like a gearbox. Sometimes you're in forward, sometimes in reverse, seldom smooth but always in transit!
                            . Cars, photos, wine. What else is there?

                            Comment


                              #15
                              For reasons of my sanity I had to give up. Move on and get the car to its new owner
                              Please visit our Classic Mustang for sale site: www.classicamericancarsales.co.uk
                              We stock a large selection of freshly imported Classic 1960s Mustangs. Fastbacks, Convertibles and Coupes. Cars are in stock in the Southeast of England with more shipping from the USA at all times. Other interesting American cars also stocked. CSRP disk brake setups sold

                              Comment

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