i went to the slp website and i noticed that they had a shift improvemnet module and i was wanting to no if this work and is there any problems with them.http://www.slponline.com/view_product.asp?P=60010

 

Yes, they work. They are basically a switchable resistor that goes inline with the line pressure relief solenoid and reduces the amount of current applied to the solenoid across the board.

PCM tuners can also achieve the same effect by modifying the line pressure tables, which requires no splicing.