On start up the transmission works well but its when i actually start to drive it at speed over 60 k's i incure problems i have a lose in transmission and i have to rev the engine in excess of 4,000rpm but it still does not want to shift in to top gear so i could be doing 100 k's and the engine is rev at 4,700rpm and also the service engine soon light comes on
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Well code 1698 means the engine computer could not communicate with the transmission control module. I doubt that would kill the engine, but there could be a wiring problem somewhere.
It could be a faulty relay too.
if you have a 3 speed transmission the problem could be with the tv rod . It goes from the carb or fuel ing. to the transmission. the rod could be hanging or the spring may have broke.If you have the 4 speed trans. you will need to have the computer scaned
Hi the Transmission control module is having communication issues with the sitting solenoids that actually preform the shifting once you initiate it by using the in car stick. these solenoids are inside of the transmission pan and you will need to replace them.
I had the same problem in my 1999 plymouth voyager. Changed both speed sensors it started shifting perfectly.. Now i get a little thump when downshifting from 2nd to first when stoping change the sensors there only about 20 dollars each its 2 of them on the front of transmission..
It's in limp home mode. You'll have to check wire connections and electronic controls. If it has a vacuum modulator you can remove it and look for trans fluid on the vacuum hose side (meaning ruptured diaphram). Double check the parts you replaced as well, especially if they were used parts. My dad went through three speed sensors in one year on his Caravan. You should drop the pan after checking other components. It could be a bad relay, shorted module or wire. The three speed transmissions are much more reliable than the four speed overdrive transmissions but with age and miles things can go wrong and parts will wear out.