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  1. rustystud

    What temperature should the TH400 run at?

    Since your transmission cooler lines run first to the radiator, if your engine is at operating temperature then your good to go.
  2. rustystud

    What temperature should the TH400 run at?

    Your correct about there being a "minimum" temperature. Most manufactures say it's between 130-150 degrees. If you start getting "knarly" on your transmission before it reaches operating temperature you can damage the seals and clutches. That's why most all big rigs (that use automatic...
  3. rustystud

    What temperature should the TH400 run at?

    The depth of the pan doesn't matter as the sender is at the top, not the bottom. I agree though it should have some protection if your going out into the boonies. A simple little brush guard would be simple to make. Actually if your going out into the boonies and expect such nasty things to get...
  4. rustystud

    What temperature should the TH400 run at?

    You correct in that my "opinion" of the best operating temperatures is on the conservative side, but after working on transmissions for some 40 years I found these temps to be the best to stay in for the life of the transmission. Also oil starts to break down at around 250 degrees. So I never go...
  5. rustystud

    What temperature should the TH400 run at?

    The sender is high on the side of the oil pan. It would take some serious brush to reach that area.
  6. rustystud

    What temperature should the TH400 run at?

    I'll answer the sender part for you. I went with the sender in the oil pan as that is the area the manufacturer suggests. Some people like to put one on the "converter out" port. The problem is that is always going to be hot. There is no factory specs for that area either. Most aftermarket oil...
  7. rustystud

    What temperature should the TH400 run at?

    The temperature should stay between 150F and 180F degrees. If you go above 220F your looking at cooking your transmission. I have my temperature gauge sender mounted on the oil pan.
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