That is exactlly what happens with old "rubbers" the main issue is that almot EVERY shop will NOT replace hoses unless they are visually leaking. Which I highlly dissagree with (even my current shop is like that, as were the last 3 shops I worked at ) becaus the failure is internal and your it going to always see it.
TLCA # 20314
84 Hilux, 22re Conversion, 63" chevy rears, Rears up front, Bobbed bed, duel e-lockers, 5.29's, 35" Ground Hogs
Step by Step Bed Bob