I had a problem shifting and thought that it was my trans, so i took that one out and installed a new one, but i keep getting the same problem its not shifting. can anyone give me any suggestions.

 

Please be more specific on the exact shifting problem you have. Does it shift at all (from or to any gear)or is the problem specific to a particular gear change. The computer is connected to the trans and controls some functions in the higher gear ranges (such as Torque converter lockup and Overdrive). Check the electrical connections to the trans and make sure the plug is not loose. (there is also a plug for the neurtal safety/reverse lights switch so do not confuse the two, it is a screw in switch that can be removed/replaced).
If the A-B servo connector is off, you should still have relatively normal shifting from 1-2 and 2-3 (I think, somebody correct me if I am wrong here)
Dialtone

 

[updated:LAST EDITED ON 03-Aug-02 AT 02:38 PM (EST)]Here is some follow up info on the A$LD electronic shift controls. There is also a vacuum modulator valve on this transmission you may want to look at in connection with your problem. The Computer also has input from the gear shift lever to determine the gear selected (overdrive versus non-od)

<pasted information>
The A4LD four speed overdrive transmission was introduced in the 1985 Bronco II/Ranger and saw use behind many 4 and 6 cylinder engines until the 1995 model year when it was replaced by the 4R44E and 4R55E electronic transmissions. The A4LD was the first Ford transmission to use an EEC-controlled torque converter lock-up clutch and later became the first to use electronic shift control (via a 3-4 shift solenoid). The French-built A4LD was created by adding overdrive to the front of the C-3 three-speed unit.
Dilatone

 

more specificly: it will go from 1st to 2nd but not 2nd to 3rd, it just stays in 2nd gear around 25 to 30 mph, the engine just speeds up so i let off the gas then press it again and it does nothing, so i changed the trans and i still has the same problem.

 

[updated:LAST EDITED ON 04-Aug-02 AT 01:26&nbsp;PM (EST)]Here is something to try and another question or two for you.
Question: When you changed transmission, Did it have vacuum modulator valve attached, or did you transfer it from old transmission?
Question: Was it a complete trans/converter swap or did you transfer ANY components from the old transmission to the replacement unit?
Question: Have you verified vacuum line from engine to modulator is good and not broken/open?
Try this: In order to eliminate the computer inputs to the transmission from the loop, remove the connector for the 2 shift solenoids from the transmission and drive it (should be a 3 wire harness). You should get fairly normal 1-2 and 2-3 shifts if computer is causing the problem. If it will shift 2-3 OK at this point, you need to look into the computer or the computer input from gear shift selector. You may also set a check engine code in the computer with the connector removed but do not wory about it, you can clear it later.
If it is still having shifting problems at this point, I would suspect a vacuum or modulator problem (or other mechanical transmission problem)
Dialtone

 

I got a 91 explorer that had a recent rebuild but now she wont shift through the gears unless i click it manualy from 1st to 2nd. also reverse slowly went out and now completly is gone. could this be the same problem? if so any info on what the fix was and how to do it would be great. -kell-

 

Kell...I don't think this discussion is going to help your problem(s). Sounds like you have more wrong than a little troubleshooting will fix. If you really want to get an idea of what MAY be wrong with yours, I would suggest removing the trans oil pan and looking inside. While there, change the fluid filter. If you find excess debris in the pan and filter, you probably have major damage that only a rebuild will fix. What you described so far could be anything from sticking valve(s) in the valve body, to major damage of the bands and or clutch plates. Yours sounds like it needs a professional evaluation. Find yourself a trans shop you trust and let them look it over.
Dialtone

 

dialtone: i tried what you said with the 2 shift solenoids, and it still didnt shift from 2nd to 3rd. so i tried what my uncle said, "to manually shift the trans while driving" by going from gear 1-2-D (while moving). it shifted to third gear while in drive but not in overdrive. tomorrow i will remove the vacuum hose and test that. if you have any input as to why it will shift into 3rd gear while in regular drive but it wont while in overdrive in please reply.

 

Here are two more things to look at besides the vacuum modulator line.
1. Double check the shift linkage is placing trans in the correct gear setting (Not an in-between setting)
2. Check the kick down cable linkage. Remove the cable from trans and work it thru its range of motion and note the upper and lower limits of travel. Re-connect the cable and have someone press the accelerator pedal thru its range and check the link movement to see it is moving freely and thru the full range and returns to the minimum position when pedal is released. If this is binding or out of position, it will make upshifts hard or even almost impossible.

I will disconnect my wiring tomorrow and do a test drive in both D and OD settings and report back then.
Dialtone

 

I disconnected wiring to soleoids and ran in both D and OD positions. As expected, 1-2-3 shifts all were normal in both settings. Look real close at the 3 things mentioned above. Shift lever settings, vacuum modulator, kickdown cable setting. I suspect you will find one of them the culprit.
Dialtone

 

dialtone thanks for all of you help, i finally gott it to work it was the TPS. thank you very much

 

Well....This is a new one on me. I have had bad TPS sensors before and never had them affect transmission shifting. Generally they cause poor engine performance, set computer codes, and power flat spots on takeoff from a stop. Guess you learn something new everyday.
Dialtone