it doesn't shift till warms a little bit. it does not slip. once warmed up it runs normal.

it only happens at the begning when i try to drive. once when the van is moving then there is no problem

i have got 1993 isuzu bighorn 3.1D. Only when i start the engine when the engine is cold and try to drive after warming up for 3 to 5 minutes, the transmission doesn't change to overdrive till the engine temperature gauge is about 1/4 up. Once the engine is all warmed up the transmission changes ...