904 internals

72 and newer 904 have a better front servo...

watch out switching to a 5 clutch drum...you need the matching pump as it is machined to clear the 5 disc drum.....you can put 5 disc in a 4 disc front drum by using the thin .061 and .068 steels and clutch disc.....

the multi spring kit replaces the single wound spring in the front clutch pac...at high rpm ( how high I dont know)..the single wound spring becomes unwound and lets the disc slip or drag...the multi spring kit stops this...

904 converter needs a chromemoly hub...no if or butts about it....

use can use the alto disc and kolene steels...i did once...now use stock disc and steels..

need to replace at least the drum bushing...pump bushing and tail shaft bushing....

new hardened pump gears are available from TCS..and A&A ...and probably other places also....

I got 4 904s that are raced...with one spare...and a couple more cores stashed away.....

I would use a manual valve body....JMO.......done rambling...lol