As the title says i need help. What would cause my 4l60e in my 98 TA to shift very harshly from park or neutral into drive or reverse, and shift harshly through the gears? It is a stock tranny no mods. All the shift points are on and doesn't act abnormal in any way other than whats mentioned above?

 

Get your vehicle scanned for codes. Sounds like you have something going on that has your trans at a max line pressure condition. Vince

 

the only one it had was p0102 low maf input?

 

replaced the tps and maf no change could it be the epc?