Only happens when the car is at operating temperature and the tranny is warmed up enough. The clutch is brand new by the way and the tranny is the stock one.

I rev it past 3 k when in gear and the shifter handle rattles like crazy and the car makes this grinding type noise. It keeps making the noise until I put the car in neutral. And if I rev it past 3k in neutral it doenst make the noise. Could it be the synchros? Also, sometimes when i shift into 2nd it grinds.

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91 Formula
305 TPI 5speed
1LE/G92/WS6

Paxton SN92 polished kit, SLP airfoil, ported/polished plenum, March pulleys, Crane AFPR(43psi),Crane Gold 1.6rrs,MSD coil,MSD6AL (4700rpm limit),Holley 9mm wires,Ac delco R43ts plugs,fastchip,Ford SVO 24# injectors,Bosch O2sensor,SLP 1 5/8" headers,SLP catback,shortened shifter,3:73s w/Auburn posi,170* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.

 

Is it the stock shifter? Somtimes aftermarket ones will amplify any small vibrations that the stock one wont, because of there more solid design, I have seen this in a couple of cars, Otherwise I dont know..Kevin