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It will not shift

(1990 Ford Ranger)
in Greenfield, OH on March 27, 2011
i just put a seal in the front and put on a filter an new fluid in it took it down the road ran fine got in to it to day to drive it an didnt get down the road not even a mile an it was boggen down an then it would not shift to drive it back home what could be wrong with it
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Popular Answer
on March 27, 2011
every time you plan to service your transmission you should first add a solvent called TRANS X to your tranny, this will disolve the old varnish stuck to the casing and tothe valve box.New oil contains detergent which will also remove all the varnish but it will not dissolve it causing the valves to get stuck and plugged.If this is the case then you will have to have the valve box removed and cleaned.You can try adding this TRANS X as it is and shift gears several times and see if it loosens up.If it does then replace filter and all the oil including the oil in pan and in the converter.I hope this helps.
rgrecio31
on March 27, 2011
First - my opinion differs on the use of "solvents" like "Trans X", because many times loosening things up after 20 odd years is not the best idea...

OK. This is an A4LD automatic transmission, which is vacuum operated. Any thing affecting engine vacuum could be causing you troubles with shifting.

However, I'm more concerned about it "bogging down" because that sounds like a driveability problem more than a transmission shifting problem. You could even have an exhaust restriction for example that is causing a lack of power. If your engine doesn't develop power, it won't shift...but that's a secondary problem.

Try to assess if this is an engine performance problem first -- then address that prior to jumping to any conclusions on the transmission.
on August 09, 2012
out of curiousity i was having problems with my transmission kicking into over drive any ways i was changing the transmission fluid and realized the shifting solenoid was burned out so i took valve body off and put a new one on and put everything back together it starts and drives and but it will no longer shift out of first its a 1990 ford ranger with a4ld trannsmission any ideas what i did wrong?
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