I cut mine and it's still governed by a low rev-limiter in 4th and 5th. When you hit 6200 in 4th and 5100 in 5th, it's just like hitting 7000 in 1st, 2nd, and 3rd...the engine just goes "wa-wa-wa-wa-wa". I believe you have to disconnect the 4th/5th gear speed sensors in the tranny to fix this...but I haven't gotten around to trying it yet.
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