WOT 5th gear grind
Thread Starter
Pro
Joined: Feb 2009
Posts: 617
Likes: 27
From: Westchester NY. ΜΟΛΩΝ ΛΑΒΕ Country>self
WOT 5th gear grind
Recently installed a new McLeod rst, new oem slave and master cyl. The car is procharged making 511whp. During a wide open throttle highway pull the shift from 4th to 5th gear will either grind or just straight up lock me out. Any ideas?
Thread Starter
Pro
Joined: Feb 2009
Posts: 617
Likes: 27
From: Westchester NY. ΜΟΛΩΝ ΛΑΒΕ Country>self
Only 4th to 5th. it is new since after the clutch install. Only does it at high rpm. Almost leads me to think maybe it's the master. It is a brand new gm unit. Maybe I need a tick?
Advanced
Joined: Dec 2017
Posts: 98
Likes: 13
From: Toronto Ontario
Could possibly be worn blocker rings are not shearing the trans oil properly to slow the gear down to make smooth engagement. If the blocker ring is cracked it will also grind on that shift. also could be a bent shift fork or damaged plastic guides on the fork.
Race Director
Joined: Dec 2002
Posts: 10,233
Likes: 21
From: Baltimore suburbs Maryland
My vote too, I replaced my 5th gear synchros back in the day because of this. When I took apart the trans you could see and feel the worn teeth in the shifting rings. I'm rebuilding it again actually.
