The only issue I've seen, and mind you this mainly applies to 727's but a 904 is so similar it could be the same for them, is if you go too far it may overlap on the 2-3 shift. 904's do have that funky single large spring in the front clutch pack that isn't the greatest so they may be worse.
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True.
I'll see what the bar does, if it does anything negative I'll put the spring back in and leave it where it sits. How can you tell if it's overlapping?
