tranny only shifting to 2nd while on the gas

[jptrader207]

played in the mud a little and now will only shift to 2nd while the gas is applied.let up off the gas and will shift to drive but the minute i press down on the gas again it goes right to 2nd.codes were ran and only one for the tranny was the coast clutch soleniod.the others are p1131,p0161,p0156 and p0135,all have something to do with the o2 sensors.that wouldnt stop it from shifting would it?

 

[jptrader207]

when driving down the road it feels like it wants to change gears but it dont.when doing 45mph the tac is about 3000rpm and when I step on the gas alittle more it feels like the tq converter unlocks then locks again?the rpm will jump up about 200rpm more then drop down when it feels like it unlocks.

 

[97_edition]

I hope i'm not stealing your thread, but it almost sounds like the same issue your explaining and I still haven't gotten mine fixed. Mainly because I don't know what is causing it either.

I was recently pulling a 10' trailer with about 50 - 18" pavers and an ATV on it. I had to slow down almost to a stop on hill and when I stepped on the gas again it would only shift into 2nd and wouldn't shift into first. I had the o/d off to start with, but going up hills it will only shift down into 2nd and will not downshift into 1st. I stopped and shifted into 1st manually and it climbed the hill with ease.

Not sure if it is clogged CAT's, O2, or tranny ?? I just had my fuel filter changed a couple months ago along with the transmission flushed with new fluids, and a new air filter.

Any ideas would be appreciated. Thanks