I rolled the sprag in my 727 and cracked the case. I run a low band apply valve body, which probably stop it from going boom. In addition to the low reverse drum being jammed stationary from the crushed rollers. Shifted into drive and it seemed slow to engage. Tried to get it to do it again, it wouldn’t. It just felt wrong. I heard it pop once, which was enough of a hint for me to pull it. Could have gone real bad. I had to press the low reverse drum out of the case. The 904 smaller drum diameter allows it to spin faster before it comes apart. The years of the 904 being see as weak are gone. Can you kill one? Sure! If the OP is not tied to the 727, he should look into a 904, he needn’t take my word for it. Search 904 vs 727 see what pops up. Just my experience.