I have a TRX400FW transmission out but at this time no TRX450 or 500 transmissions .. I do have a 2005 TRX500 mainshaft that I took a picture of beside a 2002 TRX400FW transmission ..The TRX400 & 450 have the same mainshaft & countershaft ..The spline for the manual clutch is different .. I didn't get a chance to measure the shaft size/length today ..
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