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Transmission wont shift into 3rd or 4th

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  • Transmission wont shift into 3rd or 4th

    I got a 1994 Chevy silverado 2wd 5.7L V8. It is equipped with the 4L60E Auto tranny. It has been slipping in 3rd for a while but only briefly. A few days ago I stopped at a store and when I started driving, it shifted into first fine, then second fine also, but when it was supposed to shift into 3rd, it didnt, only the engine reved up. So i stopped and tried moving the gear selector to 3rd and overdrive and got nothing but the engine reving up. It shifts into reverse, first and second fine, but I have no 3rd or 4th gear. Im going to school for automotive but have not made it to transmissions yet. Im leaning towards rebuilding the tranny with the help of my instructor, but wanted to know what the problem could be before i spend a lot rebuilding it. Could someone please help me with this issue and tell me what it might be
    Last edited by Georgiaboy6985; 01-27-2010, 05:37 PM.

  • #2
    Re: Transmission wont shift into 3rd or 4th

    are you sure it isn't hitting 1st skipping 2nd and hitting 3rd? if so, replace shift selinoids and reset computer
    '84 K30, 7" lift, Converting to International Diesel HP 60/14 combo
    '88 GMC Suburban V2500 5" lift 60/14 with 4.10s 5.3 LS swap TH400/NP208
    '94 GMC Suburban K1500 350/4L60e with updated heads, mild upgrades
    '77 Ford F250 High Boy 400/C6/Divored 205 44/60
    Veteran of Afghanistan (Army SSG)

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    • #3
      Re: Transmission wont shift into 3rd or 4th

      3-4 clutches burnt. rebuild time.
      O2 GMC RCSB 4.8L V8 AUTO 3.73's
      rebuilt/beefed up 4L60E(at 43,000miles)

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      • #4
        Re: Transmission wont shift into 3rd or 4th

        the 3-4 clutch packs are gone.

        1997 K1500 Built vortec 355
        transbuilderguy built 4L65E, yank, 14 bolt

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        • #5
          Re: Transmission wont shift into 3rd or 4th

          Originally posted by NEUMANNZZ View Post
          3-4 clutches burnt. rebuild time.
          :lol: beat me to it

          1997 K1500 Built vortec 355
          transbuilderguy built 4L65E, yank, 14 bolt

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          • #6
            Re: Transmission wont shift into 3rd or 4th

            Vic_V8, yeah Im positive that its shifting into 1st and 2nd fine and its not shifting into 3rd or 4th, even when i manually move the selector from park to D or overdrive, i get nothing almost as if its in neutral. and if it was the solenoids, which ones would i need to replace and how do I reset the computer?

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            • #7
              Re: Transmission wont shift into 3rd or 4th

              when you do the rebuild replace all the selenoids and the wiring harness, your symptoms are the result of the 3-4 clutches worn out, not the selenoids.
              O2 GMC RCSB 4.8L V8 AUTO 3.73's
              rebuilt/beefed up 4L60E(at 43,000miles)

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              • #8
                Re: Transmission wont shift into 3rd or 4th

                clutches are burnt X3

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