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48re help

Dcarroll

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Recently pulled my transmission and replaced my rear seal. While I had it out I upgraded to a 3 disk TC. While I had it out I changed all the fluid, governor solenoid, and filter. Now it will not shift down into first. The only way it will shift to first is if I put it in reverse then drop it down to first. Once on the highway(50-60mph) if I give it more than about 30% throttle it tries to down shift but never does.

Got a scanner on it. Even after changing the solenoid and transducer a second time my actual pressure is 35.5-36 psi. Target pressure is reading zero. I’m at a loss on what direction to go to next. Any ideas on where to go from here?
 

flan

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It does seem like a governor solenoid issue. Did you go with the DNJ component aftermarket setup by any chance?
 

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