Anytime I shift hard into third it grinds...bad...could it be bad synchros? After a race or twoit will grind into third even with an easy shift. If I push the clutch in then wait to shift it doesn't grind though. Just got a new short throw shifter it seems like it does it more now. Any advice? Does this happen to anyone else? Should I be prepared to buy a new tranny? I heard these ones were good for up to 800 hp though...

 

what is "these"? the stock one in an 03? thats the 3650 and no, itsrated for360lbs/ft tq. many people are running alot more than that but thats its official rating.

donno about the tranny, sounds like synchro but have you tried putting the old shifter back in by any chance?

 

Yes "these" is the stock tranny... no havent put the stock shifter back on...it was a pain in the *** getting it off...required a torch and a pry bar haha not sure if I wanna go through that again...

 

You and me have the same problem.. I have a steed tri-ax. It doesn't have anything to do with the shifter. Its the synchros. Mine has been doing it for almost a year, so depending on how hard you run your car you should be ok for awhile.

 

I had a similar problem and I switched out the tranny oil to royal purple and it went away try changing the oil.

 

yeah try changing oil and throwing the stock shifter back on

 

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Just leave the shifter on.. its fine.

 

Isnt RP syn. bad for our synchros?

 

Try some GM syncromesh in the tranny should help out with the grinding.
Shifter probably doesn't have much if anything to do with it.

 

mine does the exact same thing, i have to wait to shift also in order for it to not grind. iv been told by a few shops that its my syncros. im just gona put a rebuilt 3650 in it or save for a t5.