Happens at any speed at all, doesn't really matter if I'm doing 20-30mph or 60-70mph. More dependent upon the throttle I give it.

Also, when I move the car into gear a little harder sometimes, I hear a metal clunk noise. I think this is normal though if I searched right...

 

I think that a mod should stick a post with the correct fluids at top.

.58 qt Diaqueen T/C and rear diff
3 qt Penzoil Syncromesh or BG Snycroshift in the tranny.

I use the Penzoil Syncromesh in both of the EVO's they both shift very smooth always.

 

Kids gonna learn the hard way about putting other fluids beside Diaqueen in his TC.