hey guys I have a 99 Si 454whp b16 turbo and It has a short shifter i believe a skunk 2. When i baught the car to swap the motors it came with ont alredy. How ever I also have a LSD and Act clutch. Alot of times when i'm driving when I try to shift from third to forth. It will miss 4th and it will make a horrible grinding sound almost like i was trying to shift with out the clutch. What causes this ? Is it my tranny or clucth or is it possib;y due to my short shifter . Also I believe I have a riped tranny mount i was thinking if the motor is under a load and moves and makees thing unaligned ?

 

Bump Any ideas guys ?