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Thread: 700R4

  1. #1
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    700R4

    As I get closer to my 56 being a driver, I've run in to a problem. I've got a 350, 700R4, 3:42 10 bolt in the car. The 700 was built over 10 years ago, and sat dry on the floor until I installed it in this car a couple of years ago. Lately, I've left my shop and drove it down the road a couple of miles several times. At first, it was late shifting an harsh. I've added some Seafoam trans additive to it. It now shifts smoothly 1-2, and 2-3, but I've never had it shift in to 4th, ever. Before I burn it up, any suggestions? The guy who built the trans has checked the TV cable and says I have it set right. He says he'll come check it.........maybe the governor?

  2. #2
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    How fast are you getting up to on these trips. The way mine was built it will not hit 4th until about 45 mph.

  3. #3
    Moderator NickP's Avatar
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    TV Cable setting is correct?

  4. #4
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    TV cable is set ok, according to trans builder. Although no speedometer hooked up and calibrated yet, easily 45-50 mph.

  5. #5
    Moderator NickP's Avatar
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    I understand the "According to" however I would verify it. All to often it's not.

  6. #6
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    Well, last Sunday I followed a friend down the road, got up to 60..........no 4th gear. Talked to a friend who owns a shop in town, He had me talk to his mechanic about it, because they had recently had the same problem. He told me what to do and forwarded a website that he used to fix the problem. I thought it was crazy.
    I followed the instructions, put the rear end on jack stands, removed the TV cable from the carb, pulled it in and out a couple dozen times, fired the car up and abused it on stands......I could get the 1-2 shift and the 2-3 shift, but no fourth........disappointed, I took it off the stands and drove it down the road. As I accelerated, got 1-2 shift, 2-3 shift, kept accelerating and........what was that? 4th gear! I still don't believe it! The theory is that the valve body either has a small piece of debris or an air pocket in it from the rebuild. I don't care what it is, I'm just stoked that that problem is solved!
    One step closer to a driver........now, get the Juliano 3 point belts installed, and new gauges...........and get my butt down to the tire shop!

  7. #7
    Registered Member Bihili's Avatar
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    Maybe the Seafoam is working.
    Bill 1957-427-177-6-410

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