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1994 Ford Explorer Making Noise - Drive Train & Driveline
Question: This 94 Explorer is sweet in every way but one. As I'm cruising down the highway, in OD, 60-65MPH, 1500/1700RPM, everything is wonderful. Cruise control is on, all is right with the world. Then.........Hey.......what is THAT! The RPM's jump to 2400/2500, and the volume goes up in the tranny. Not as loud as a kick-down to third, but kind of half way there. First time it happened that's what I thought happened...that it shifted out of OD and into third, but no.......I can manually drop it down to third and that jumps the RPM's up to 3000 or more with the expected increase in sound. This is like it finds something between third and OD. Can't get any pros around here to acknowlege this behavior as something they recognize, just what feels like a standard answer about a range of prices that you know will be the higher, regardless of the problem......anyone out there recognize this as a typical issue or had this happen to them? Please...not frantic about it, but it makes the mileage drop considerably, and I'm worried about it leading to something worse. THanks
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Technican: Sounds like the torque convertor is unlocking. Does it do this at random, or mainly when you are going up a hill?
Owner: There doesn't seem to be any reason for it to happen but it WAYS happens after several miles. not on a hill, not when changing speeds, just happens when purring along...maybe heat related?
Owner: Sounds like the torque convertor clutch solenoid is going out or there is a problem in that circuit. Late model transmissions use a lockup torque convertor mainly to save gas. A lockup convertor elimates the wasted motion in a normal convertor, and effectively locks the engine and tranny so they turn at exactly the same speed. It is designed so it can lock and unlock depending on the need at the time. Yours seems to be doing this at random. It really needs to be diagnosed on an electronic scanner to identify the problem correctly. It could be a problem in that circuit or something else could be giving the tranny false information telling it to unlock. I hope this made sense and I will be glad to awnser any more questions you have about it. Here's How To Get Guaranteed Solutions In Minutes
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