Re: transmission seems to shift into gear but will not go
You did more harm than good by changing the filter and fluid. Did you have the system flushed or just drained? If you drained it then you might have gotten some larger particles of dirt caught in a valve body component and thats probably why it wont shift...
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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.
Sounds like the shift cable is off the transmission under the hood. Raise the hood and check to see if the cable is moving the linkage going into the transmission when the shift lever is moved in the car. Be sure to have park brake on.
bad transmission, I changed one just like it,first thought the clutch had locked up, but changed that and same thing (locked up)and took pan and topshifter out, and the gears actually heat welded themselves together, my guess as to reason would be lack of gear oil. only fix is to replace transmission or rebuild, but with gears in that shape better bet would be to find another, and make sure you change gear oil and fill to proper level
Ok I have no Idea who told you not to change the fluid? However there is a reason you have to drop the pan to drain it, or change filter and the reason for this is. So you cant just change fuild and leave dirty filter in, or change filter and leave dirty oil in. Your wouldnt just change one or another on your motor would you? lol Anywho your problem is either burnt fuild. Yes the fuild can be come burnt and lose it vascoity, and weight. (basicly your runing gravey through it.) lol Or the fuild is termendously dirty strained or not. FYI there are clutches in your transmission.... Have you ever heard of clutch dust? Well in an automatic because of the fuild its not clutch mud..... explaining why when its cold and the oil is super thick it has problems, but when it thins up when its warm its fine.
First thing to do,try to pump your clutch before you shift into 1st gear then if you feel makes better, most probably you have problem with your hydraulic clutch system, check the clutch line if there is an evidence of fluid leaking or it could be internal leak.
Second thing to do, check your transmission oil, may be it' s too old or you use a thick oil thats why when cold its hard to shift then when the engine rich the normal temperature(warm) the oil become thin and the shifting will smooth. Remember the very old oil become thicken and the purity is gone and can cause of hard shifting. in this regards i suggest you to change the transmission oil and check the used oil if there is small peace of metals, then you are in big trouble,
The 1st thing to do is have a test run on the transmission control module to see if any trouble codes are present, next have you ever serviced the transmission, fluid and filter change, should be done at 60,000 miles, on occasion this can cure problems like yours.