the shift kit not only will increase the quickness of your shifts, it is more preventive maintenance than anything.

when you drop your tranny pan, place more magnets in as well, the 1 that we have will look like a chia pet when you drop yours. it collects tiny metal fragments and keeps them from running through your tranny. you can get a moroso magnet kit from summit racing for a few dollars. i would install a drain plug too for easy fluid changes.

the kit will redo the seals and just prolong your tranny. its a must for the a604. check out the asog forums as well (www.asog.net), they have some good insight towards it too.