okay so i rebuilt my transmission because its a farm truck and i keep blowin it up haulin heavy equipment around. so this time i put the sonnax hd 2-3 shift valve in it. now idont have fourth gear or its in limp mode and its just weird like it starts off in od but wont go above second and then when i shift down to second it jumps up into third gear now i thought it was a cross leak so i replaced the turbine shaft seals and well i just dont get it. please help me out any info would be very apreaciated

 

oh i also put a used valve body out of a truck at the junk yard in it because mine had bad valve bore wear could it be the wrong valve body

 

please anybody help i dont know what i'm doing wrong.

 

I PM'ed you my phone number to call so that we can discuss your exact symptoms and everything you did. It will help to know what yoar your trans is and what year the donor valve body is from.