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Tranny diagnosis
https://www.slantsix.org/forum/viewtopic.php?t=48006
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Author:  Chuck [ Sat Feb 25, 2012 7:47 pm ]
Post subject:  Tranny diagnosis

I have a rebuilt tranny ready to go in my Dart but I want ti pre-diagnose the old one so I can make sure I correct the problem. When I start out in Drive, it shifts 1,2,3,2, and stays in 2nd, no matter how fast I go. It only stays in 3rd for less than a second. I am thinking maybe a stuck governor. Any other ideas on what I should be looking for?

Author:  bigslant6fan [ Sat Feb 25, 2012 11:03 pm ]
Post subject:  .

By all means,do the factory pressure tests first. Did this trans always have this problem,or did it just start one day? Does it work OK in reverse? I agree, it sounds like a governer or valve body problem

Author:  Chuck [ Sun Feb 26, 2012 1:18 pm ]
Post subject: 

It just started one day. Works OK in reverse.

Author:  WagonsRcool [ Sun Feb 26, 2012 2:52 pm ]
Post subject: 

You need a 300psi pressure guage connected to the pressure test ports on the trans. It could be governor- pressure should increase steadily with vehicle speed. My bet is on a valve body problem.

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