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Bench test/ air test a C4?

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  • Bench test/ air test a C4?

    While going through some old e-mails I found one from the guy I bought the C4 from. I forgot that one of the reasons I bought it was not only was it a good deal (the price of a core since he just needed it gone) but he also said according to the other owner it had been rebuilt not too long ago (he swapped in a T5 after he bought the car). How much would an air test tell you about the internal condition of a C4? Is there any other way to bench test the C4? My intent was always to have it rebuilt so I didnt bag it or anything and it has been sitting for almost 3 years now. Would this have affected anything? There was residual tranny fluid still in it which looked to be in excellent shape. I could always just install it and if it doesn't work pull it back out but I would prefer not to lol. I would hate to pay the tranny shop $4-700 (that was the quote for a bench rebuild, depending on what needed to be replaced) to have a perfectly good tranny rebuilt when I am not looking at this tranny as a long term one. Thanks guys!
    Tim

    M&M Member #35
    1965 Mustang coupe, 200 I6, Holley 2300, Clifford header, true duals w/ 26" Smithys
    1988 Mustang GT AOD vert

    "A veteran - whether active duty, retired, National Guard or Reserve - is someone who at one point in his life wrote a blank check made payable to the United States of America for an amount of 'up to and including my life.' That is honor. There are far too many people in this country who don't understand it." -- Author Unknown

  • #2
    My opinion:

    Since it's out and you can get to it, change the seals because it's cheap and put it in and go.

    The c4 in my truck sat for who knows how long before I got it and for two years when I had it stored and all I have ever done is make sure the fluid and whatnot was ok and drove it.

    I'm sure there will be better answers, but if it was mine, I'd go for it.
    68 F-100 2wd shortbed
    302/c4 3.50 9"

    81 F-100 2wd longbed
    parts truck

    92 F-150 4wd longbed
    302/auto

    94 P71 Crown Vic

    97 Escort

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    • #3
      Thanks Joe for your opinion . I am sorta leaning that way but I figured if I could bench test the c4 while it was out I might as well.

      I think I am going to pick up a new stock convertor so that I make sure there isn't crap in it from the forward clutch pack going out in the current C4.
      Tim

      M&M Member #35
      1965 Mustang coupe, 200 I6, Holley 2300, Clifford header, true duals w/ 26" Smithys
      1988 Mustang GT AOD vert

      "A veteran - whether active duty, retired, National Guard or Reserve - is someone who at one point in his life wrote a blank check made payable to the United States of America for an amount of 'up to and including my life.' That is honor. There are far too many people in this country who don't understand it." -- Author Unknown

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      • #4
        when i bought my 78 Mustang, it had been sitting for 7 years, i bought it, hauled it home, took the engine out (302) and put my own 280hp 306 in, gave the transmission some fresh fluids, i raised the rear on jackstands, and tried it, (the engine already had 3000miles on it, so it needed no break-in or anything) 1st gear worked instantly,that was it. but after 30 seconds or so, 2nd and 3rd found their way, and also reverse! drove the car for a year and put 2500 miles on it, even raced it.
        72 Grandé , 351C,4-speed,3.89 gears, 4-linked rear = tons of fun!

        back on track!

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        • #5
          Air checking is a good thing to do. It will tell you about the condition of the seals and servos. It will NOT tell you about the condition of the clutches or the pump though.

          Ben
          '93 & '97 champion of Central Indiana Dirt Racing Asc.
          C.I.D.R.A.
          __________________________________
          '79 Fairmont 408C/C4 10.50 @ 127
          '70 Mach I 351C 4V toploader
          '07 Mustang GT

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