I have a 1992 f150 with 302 auto/overdrive. Its transmission was rebuilt 5 months ago and switched fine. It has sat for 6 weeks or so (due to my health) and when I went to drive it today, I got it started (the battery was low and I had it recharged at O'Reilly's) and let it warm up before driving it. When I drove off I put it in OD and it never would shift out of first. If I put it in 2nd, then it would drive and stay in 2nd. If I put it back in OD, it would shift back to first and stay in first. What could be wrong, it drove fine last time I drove it and then today, this???
If the shift lever is floppy and not shifting, drop the steering column so the steering wheel is resting
on the seat. you will see on the shift linkage, a pot metal casting....kind of tube shaped, about
a foot long. It is mounted to the top of the steering column. check for a fatigue fracture on that tube.
if you find that it is broken, it's not too bad a job to remove it. will need a screwdriver with
torx head bits, and a 1x4 inch socket.
Could be possible that your TV Linkage (Throttle Valve) has gone out of wack. The cable could be stuck in a way that it's sending the transmission thinking it has you in full throttle thus not letting the transmission shift out of first. Take it back where it was previously serviced. There should be some kind of service warranty.
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If the transmission was rebuilt 2 years ago the fluid and filter did not need to be changed. In a 1981 there are no trouble codes to retrieve so whoever suggested that is out to lunch, Unfortunatley you need to get the transmission rebuilt again, hopefully it gets done better this time. Using the dexron oil in Ford transmissions is something transmission shops do because they don't want to stock different fluids. While it's not likely that using dexron oil lead to the failure it would be better to use mercon or type F oil.
Are there any lights lit on the dash ? check engine , overdrive etc..
could be just a shift solenoid ... Try draining trans fluid an replacing filter. Have to drop transmission pan .. what's the fluid look like ? a nice pink color ? does it smell burnt ? Is it full ?
Usually the transmission needs to be rebuilt in that situation. It's a very common problem if that's the famous automatic overdrive transmsission. AOD I have had three trucks that have done that. It usually starts by shuttering when it shifts and than finally goes out. Sometimes the Lucas transmission treatment gives you a little more time, but it sounds too late for yours. From what I understand (mechanic told me) that when the overdrive goes out, it takes third gear with it. If you drive in hilly areas, that overdrive is shifting in and out all the time as you go up and down hills and wears it out. My Dad had that hapen on his F150 and he replaced his transmission with a junk yard transmission that turned out to have the same problem. I had that transmission replaced with a Jasper rebuilt and it worked great. I think it was $1300 for the rebuilt trans with the old one core trade in. I think when 3rd gear goes out, you can only go about 45mph without over reving the engine. I saw that same problem with a Ford Crown vic with that same transmission and 302 engine that my neighbor had. Did your third gear just go out all of a sudden or were you getting like a shuttering or kind of a grinding sound when it shifted?
That's probably why it's lurching. It's try to shift down. The valve body is a reasonable suspect. Was the balve body yorgued? Are the ck balls in the proper circuits? If the valve body has any loose bolts, the gaskets need to be replaced again. Good luc
I have that exact same truck and transmission and My Transmission did the exact same thing about a year ago and there was some kind of snap ring inside the transmission that broke. I originally thought it had to be an electirical problem because the truck shifted fine until OD or if i turned OD off. The 4r70w is a light transmission and i would suggest you have a shift kit put in and they make a heavier kit to beef it up.. Sorry its probably not the new you were looking for.
Check that you don't have a cable from throttle to transmission that is partially seized and just needs to be lubed up. Probably be able to follow it down and see where attached at tranny and make sure moving freely at both ends. I usually found linkage at tranny tight, and lubed until moving freely. It's like it's stuck in passing gear.