I have a 92 chevy g30 van 5.7 liter with a 4l80e transmission. The transmission has a delayed 1-2 shift on moderate acceleration. All the other gears do fine. The fluid looks great and it has a new transmission filter, tps, and output speed sensor. It will shift fine if you let up on the accelerator pedal. Any help would be appreciated. Thanks.

 

Sounds like the throttle valve cable may need an adjustment.

 

This transmission is electronically controlled so it does not have a throttle valve. Any other thoughts or questions?

 

The only other thing that could be is the valve body. I have seen some where replacing the valve body took care of the problem. I recommend talking to a specialist first.