86caprirs said:
Ok. well i am a tech with Ford in canada. I was talking to my trans guy and he said that the EEC of that year controls nothing.The trans is stand alone.But at the same time my boss says that the trans guys are to fresh out of school to know everything......
So where is this solinoid??I know the trans was working fine before.It just sat for 2 weeks and when i drove it the first time it felt wierd.after the first few stops when i would accelerate it would feel like it started in second.So i dropped it into manual 1 and the shifted up in to 2 then drive.I stopped at the set of lights and put it back into od and drove on the freeway.Thats when i noticed it was not shifting into od....just stayed into 3rd.i tryed shfting into D then back to OD, but it did not help.So i just put the pedal to the wood untill the RPM's were just to much for the 4.0L and it would not shift.The trans guy said to remove the vacuum hose on the modulator.No fluid came out of the line or mod. So they assumed i need a full rebuild.
It is a good vehical dispite the Km on it.I do want to do a 5.0L/AOD swap to it down the road.Just not now since i have a huge project undergoing right now.
If i was having a VSS problem, my spedo would be acting up would it not??Also what happends if the governer goes???hard shift always????So you are also saying that with the NGS i can check my trans out and monitor pids on the trans side???Plus VSS and TCC?????
Sorry i know i am out of my league when i comes to trans work so i learn as i go along.
Not sure why your trans techs didn't know this, but the A4LD has always had an electronically controlled lockup clutch, and from '88 on, the 3-4 shift was also electronically controlled. Both shift solenoids are attached to the valve body which can be accessed through the transmission pan. Wiring can be accessed without unbolting anything, so that's where I like to start.
1) Pull codes. I expect your NGS tester can pull codes, or you can just do it the old fashioned way with a jumper wire and voltmeter (being a Ford tech, can I assume you have access to all the manuals and such for such operations?). If you can get your NGS tester to monitor PIDs and such from a '92 EEC-IV computer let me know. To my knowledge, '92 and earlier computers don't even have that ability, so you have to use a breakout box. Some '93 and later EEC-IV computers had the ability to output live data to a scanner, but I haven't seen anything to confirm that functionality in older computers. Resolve any codes, until you get everything to pass. If problem still exists:
2) Check wiring to transmission solenoids. Make sure they are getting +12 V from the EEC relay with the key on. Make sure you have continuity.
3) Using the output state EEC-IV test, see if the computer can command the 3-4 shift. Then a road test to see if the computer is choosing to command the 3-4 shift.
If it passes these tests, then the problem is internal to the transmission.
A note on the VSS question: Your speedometer on a '92 is cable driven. VSS is located on the end of the cable. There could easily be an electrical fault that interferes with the signal to the EEC-IV computer that doesn't interfere with the mechanical operation of the cable.
That's what I know. Hope it helps.
BigpolC: I wish I could help you better, but I'm not that familiar with the 4R44E. I know all the shifts are electronically controlled, and I would assume that the basic wiring and such are the same as for the EEC-IV controlled shifts in the A4LD, but I really don't know. I would expect the diagnosis could be similar (pull codes, use scanner to see what the computer is telling the transmission to do), but I couldn't really give specifics.
