Frank Allen

been having trouble while in d4 at low 35 to 45 mph, engine shakes like a miss fire, if i shift to d3 it goes away and is ok, the transmission went out and was replaced and this one shifts ok but still have this missing problem, im showing no codes, need help.
Frank allen
92 lx automatic 178k miles

poorman212

So this a RPM issue or a speed issue.....sound like RPM, so I'd inspect the inner cv joints.

Frank Allen

its not cv joints because you can shift to d3 and it smooths out, its about 30 to 40 mph light throttle, i would tend to beleive its the transmission because of the fact it clears up in d3, its like a engine miss but then high speed is just fine , trouble is it did the same thing with the other transmission and i cant beleive two of them would avt the same way, but i have no codes whatsoever, so im in the dark for sure. ive owned 4 of thes cars and none of them did this, i also changed the tcu but no different than the old one. it feels like a engine when the regr ports are stopped up but again no codes, had em cleared one time. any help would be appreciated.
thanks for your input.
F rank Allen