Thats the scary part. I had them changed at the Honda Dealership. I'm just going to bring it in. I appreciate everyone's input. I'll keep you posted on what the problem was/is.

 

i have an 02 and it grindon 3rd gear when up shift from 2 to 3 with high rpm. it happened when i replaced my rear diff from honda world in westminster. they told me it is normal and don't want to fix it.

 

Grinding under no circumstances is "normal", and is caused by either user error (clutch pedal not pushed in all the way, or released too early), a worn mechanical part (gears ground down, failing syncro) or by improper lubrication (wrong transmission fluid).

If you don't want to take your car in yet, then try changing your tranny fluid with some GM Synchromesh Friction Modified and see if that helps the problem. Also move your seat forward one click (I know, you are sure that you are shifting properly, but just for shiz and giggles it wouldn't hurt to make sure you are pushing in the clutch pedal all the way to the floor and not releasing until after the transmission is in gear), as well as trying a high rpm, but slow moving shift. In other words don't try to slam it home, but rather pull steady and smoothly and let it slip into gear before moving your left foot at all.

 

you didnt have the 1st gear synchro replaced at the same time?? 1st and 2nd take the most abuse...

 

I'd mention this to Honda weather they do anything or not.
At least have it on record that you did make a complaint.