a bone stock 904 is very ez to kill with a heavy foot.

loose 2nd,adjust band,bark 2nd,lose 2nd,adjust band,bark 2nd,lose 2nd,adjust band...look for replacement,find 727 replacement,one good pass and 904 is done,R&R it and upgrade to 727..shortn drive shaft

i have done it many times with 904/998/999 weak links

thorttle pressure rod is very important and needs adjusted correctly for any auto to last.