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3T40 Transaxle Rebuild

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  • #548402
    Matt BrandsemaMatt Brandsema
    Participant

      Hey all,

      I have a funny little problem. I am rebuilding the transmission on my 98 Chevy Cavalier (3T40 Transmission) and everything has been going great so far except..

      I am in the “re-assembly” phase and I have found that the rebuild kit did not come with the same amount of steels as was originally in the car.

      For example, the direct clutch drum had 5 steels in it, but the kit only came with 4. They are both the same thickness so I don’t know what the deal is. Same story for the Forward clutch packs and the Low/Reverse clutch packs. As for the friction disks, I have one extra. I don’t know what is going on here because everything else in the kit has been spot on exactly the same.

      My old steels are in good shape and I was thinking of just re-using them. I don’t know how many people here have experience rebuilding an auto-trans, but any advice would be appreciated!

    Viewing 5 replies - 1 through 5 (of 5 total)
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    • #548448
      davedave
      Participant

        by all means, re-use the old steels. the steels rarely ever go bad… only if they are tarnished.

        good luck on the rebuild…. sounds like fun. 🙂

        #548461
        Matt BrandsemaMatt Brandsema
        Participant

          Thanks for the reply!

          Yeah I am having a lot of fun with it. I am also making “time lapse” YouTube videos of the whole process. I am going to post them here when it is all done.

          #548572
          Matt BrandsemaMatt Brandsema
          Participant

            I am about to air check the various clutches in the transmission. Would you happen to know what psi I should use to do this with?

            #548582
            davedave
            Participant

              It is a relatively low psi: 25 to 30 lbs. You might experience some air leakage even at this psi, so I wouldn’t go above 30 lbs.

              #548592
              Matt BrandsemaMatt Brandsema
              Participant

                Thanks a lot!

              Viewing 5 replies - 1 through 5 (of 5 total)
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