My automatic 89 ford bronco 2 won't shift when it gets warm?

It has a real hard time shifting out of 1st gear, after it gets past that, it has no problems. It usually starts this when its drove for about 30 min. I've added fluid, fixed all water leaks, and i'm also gonna be messing with the modulater valve today, is there anything else i should check, or what is wrong with it. Thanks.

Added (1). and also, the only way i can get it to change when it does this is when i let off the gas

Try slick 50 trans fluid. I caught a guy trying to rip me off had 1994 tbird trans slipping say it would cost me $1700 for a new one. Went got it drain and put slick 50 in it ran like new.

Have you serviced it? Change the filter? If so, it sounds like the modulater, your on the right track.

  • Truck won't start after being warm? I have a 2007 Ford F450 truck that runs well, and starts up when it is cold. But after run it until its gets warmed up I turn it off and try re starting it and it refuses to start up again afterwards. Anyone know what the problem is? Please help! 2007 Ford F450 with an engine 6.0 Turbo/diesel
  • My 2000 Ford Taurus won't shift into fourth gear is it ok on a 700 mile round trip drive? I have a 2000 ford Taurus and it doesn't shift into fourth gear anymore. Its been that way for 2 years. It runs fine just doesn't shift into fourth gear and the transmission light does come on after a while of driving it. I was wondering if it would be ok to take it on a 700 mile round trip drive? I know its not good for it I just need to know if I'm going to be stranded on the highway somewhere because my trans went out.
  • 1997 Ford Ranger 4.0 V6 won't shift into drive after being driven. Takes longer than should to shift into drive when first started? It will go in reverse fine. First thing in the morning when I leave for work, it will shift into drive on it's own, but takes a bit longer than it should. After getting it warm, won't shift into drive at all. I can shift down to 1st or 2nd, then back into drive and it will "pop up" into drive within a second or 2. I also have a ODB2 error P1744 (Torque Converter circuit).
  • My Automatic 2003 Ford Mustang V6 3.8L won't shift out of second I need help with my car, it's an Automatic 2003 Ford Mustang V6 3.8L I'm driving normal and it shifts out of 1st but then it doesn't want to shift to any other gears, so it does this reving the same as if it was in nuetral and I replaced Transmission filter with new oil, the shift control solenoid, and the pressure control solenoid, it has to be mechanical then right because the check engine light isn't on, Can someone please help me!