'96 Explorer transmission issue.
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'96 Explorer transmission issue.
Was wondering if anyone can offer some advice. My wifes explorer has a long delay when shifted in to reverse when its cold. When it warms up it almost completely clears up. My gut reaction was filter and fluid chanfe but it made no difference. Also when cold it will hold forward gears for a long time not getting past third until it triggers limp mode. Once that happens she can stop and turn off the car and restart it and then its fine. If anyone can provide some direction i would be very grateful. Thanx, Mike.
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Was wondering if anyone can offer some advice. My wifes explorer has a long delay when shifted in to reverse when its cold. When it warms up it almost completely clears up. My gut reaction was filter and fluid chanfe but it made no difference. Also when cold it will hold forward gears for a long time not getting past third until it triggers limp mode. Once that happens she can stop and turn off the car and restart it and then its fine. If anyone can provide some direction i would be very grateful. Thanx, Mike.
Just a thought. impish
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Not that i have been able to pull yet. One of those things the time i was able to.get it on a computer we couldnt get the thing to act up! I appreciate tje thought I was unaware that trans pressure was something that could be checked. Ill have to get it im the tranny shop and see what they say. Thanx!
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These transmissions, yours likely either a 4R44E or 4R55E, are told which gear to engage by the computer, including the initial engagement, whether "D", "R", "2", or whatever. After initial engagement, subsequent shifts are all brought about electronically.
Meanwhile, the computer, knowing how hard the engine is working, and how fast it is turning vs. vehicle speed, "tailors" the hydraulic pressure to make all shifting conditions optimal for the transmission. In other words, shifts are easy, sooner, and smooth, when the engine is not developing BOO-COO power, as a result of varying "control pressure".
It all sounds terribly complex, but is not in reality. Speed sensing of the transmission's internal shafts, allows the computer to know if something's amiss, if it "sees" inappropriate shaft speeds, and can thus deduce the like reason for that, and call it out as a digital trouble code. Self-diagnosis, if you will, taking away a whole lot of bull**** and guesswork as occurred in the past. impish
Meanwhile, the computer, knowing how hard the engine is working, and how fast it is turning vs. vehicle speed, "tailors" the hydraulic pressure to make all shifting conditions optimal for the transmission. In other words, shifts are easy, sooner, and smooth, when the engine is not developing BOO-COO power, as a result of varying "control pressure".
It all sounds terribly complex, but is not in reality. Speed sensing of the transmission's internal shafts, allows the computer to know if something's amiss, if it "sees" inappropriate shaft speeds, and can thus deduce the like reason for that, and call it out as a digital trouble code. Self-diagnosis, if you will, taking away a whole lot of bull**** and guesswork as occurred in the past. impish
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UPDATE! Tore everything down today, and found: Intermediate servo cover cracked (nit sure what caused this), top valve body gasket blown out, torque converter pump drive hub stripped! Everything else looks good. Checked biost valve and spring thinking mayve that caused an overpressure but it checks out so. Replacing all the bad stuff and reassembling tomorrow.
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