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replace engine temp sensor. trans won't shift into o/d until engine has warmed up. there are two sensors, one for the temp guage and one for the computer.
yes
700R4,,,, NOT 4R,,,,, Its an overdrive tranny that has a very good locking converter, Its actually the best overdrive trans ever made by GM, It will shift on its own and locks up nicely. 88 to 92
Be careful on this. I did it to myself . I install my transmission back on my 89 bronco and found out I didn't lock in the converter right and damage it. Cost me an extra $700 to repair the pump and new converter had the same systems as you.
I have an '89 Bronco XLT, it has a 25 gallon tank
Yes. The Bronco body style didn't change again until after 1989.
YES!
If it's an automatic, probably an electrical fault in that circuit. If it's a manual , more than likely bent clutching teeth on the 4th/5th synchronizer. I have an 89 auto that had a symilar problem. It was a blown thermostat. EXACTLY. If the vehiicle does not reach a certain temperature the trans. wont shift into overdrive. I had this problem years ago and it took 3 genius dealers to figure it out!!!
EAFT
vehicle has a aoutomatic transmission
behind the panel,next to the parking brake.
Chevy/Chevrolet didn't make the Bronco, homie...