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th400 oil psi question..

Discussion in 'Chevy Trucks' started by spongebob, Jun 10, 2004.

  1. spongebob

    spongebob Senior Member
    Messages: 102

    anyone know how much oil psi this tranny puts out?? i want to add a oil psi gauge..
     
  2. ratlover

    ratlover PlowSite.com Addict
    from IL
    Messages: 1,325

    Depends were you are taking the reading from. I personally dont see much reason to run one on a consisten basis(maybe jsut to trouble shoot) Trany temp is more important.

    a 300psi guage should be safe if you take it off the test port on the driverside. its a little obove and twards the back in relationship the gear selector. It kinda sticks out too I believe.
     
  3. spongebob

    spongebob Senior Member
    Messages: 102

    this truck is a 1 ton dually that i use as a service truck, i carry alot of weight and go up long mountain grades..i have a temp gauge, but thought a psi gauge would be of...use as well, thanks for your reply.:)
     
  4. wfd44

    wfd44 Senior Member
    from Maine
    Messages: 369

    Trans pressure varies widely during operation. It is only really relevant to a transmission shop.

    As ratlover said trans temp is the only one relevant to the operator.
     
  5. ratlover

    ratlover PlowSite.com Addict
    from IL
    Messages: 1,325

    PSI as was said is just a way to diagnoss a problem, if you start seeing a noticable pressure drop you will experience some slipping clutches(easy to feel) and heat. Its not like a water temp thing were you can look and say, gee I'm getting hot better start driving nice or figure out the problem. PSI drop generally means a smoked trany or at best a restricted filter.