imp
Explorer Addict
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- November 12, 2009
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- Year, Model & Trim Level
- 59 Ranchero F250 D'Line
For p0761 it says a gear problem? Not a Solenoid problem? In the code database, it says solenoid C(3) issue. it goes into 4th gear, but it does not go into overdrive after that. Should I take it back to the transmission person and tell them? Because this is the same issue I had before and after Tranny rebuilds. In other threads I have been shown or found, the issues that match mine seem to be some thing wrong with electrical or need to adjust the OD band on outside of tranny, is that something that is also a possibility? Should I look into that? Also, another person who had same issue took out OD servo on opposite side of the OD band adjustment and cleaned it. I have already replaced the solenoid and want to knows if the band adjustment or servo cleaning is a direction to go as well. Thanks for the reply, it is appreciated.
Sorry for the delay answering, I apologize. I'm lost. Why are we getting into the 5R55E now, when we're dealing with the 4-speed, earlier transmission?
"it goes into 4th gear, but it does not go into overdrive after that" 4th. gear IS the overdrive gear, in 4R44E AND 4R55E transmission. You REPLACED the C Solenoid? Are you certain you replaced the correct one in the trans? They're alike, as I recall.
Have you described exactly how the transmission acts as you accelerate the vehicle in Drive under minimum throttle conditions to bring about the shifts? Watch the tach. for each shift point, 1-2 ought to be smooth, as should 2-3, but 3-4 is not happening at all? Transmission seems to stay in 3rd. gear? Doing this, keep in mind TCC may engage and look like another shift on the tach, but it's not. Don't mistake it for the 3-4 shift! After the tach settles down to it's lowest reading, vehicle moving at constant speed, about 50 mph, SLIGHT increase in throttle should show NO INCREASE in rpm, IF TCC is engaged. SLIGHT, or TCC will UNLOCK, and rpms jump up. When tach is finally steady, do rpms at 50 seem higher than they normally used to be? I would guess they should be around 1400 or so, in 4th. gear, TCC engaged. If it's engaged, and you see about 2000, you are likely in 3rd. gear. The tach can be a very helpful diagnostic tool, if you practice using it, and understand it.
Trans was rebuilt? Was valve body disassembled, all valves checked for freedom of movement, no metal particles caught anywhere?
JK is right on, about the diagnostic tool which simulates the actual transmission operation by "forcing" the appropriate solenoids ON and OFF, and seeing what functions properly or not. This COULD be done manually by having the vehicle up on stands, disconnecting only the appropriate solenoid connections at the PCM, leaving the pressure sol(s) connected, then grounding them one by one, while observing the speedometer reading, keeping eng. rpm fixed, not real high, maybe 1200. 4X4 HIGH would have to be engaged to defeat effects of ABS interfering, and I think recommending anything of that sort is beyond the scope of the forum. Your call. If I were to do it, though, I would measure the "pulled-in" coil current draw of each solenoid as it were energized. If "C" pulled higher current than the others, possibility exists it's plunger is binding due to mechanical reasons, the shift would not occur, or if it did, may be delayed as solenoid slowly pulled "home". IF anything like that were seen, you could rule out mechanical trouble beyond the hydraulic control system. imp