My 727 had a bit of a "bang" shift from 2nd to 3rd. Seems this is caused (and not unusual) by one band hanging on
too long when the other engages. A very tricky adjustment to do with band adjustment. If you were to dismantle the tranny
you'd probably find the accumulator spring was either there or not. This cushions your shift like a damper with oil on one
side of the plunger and a spring on the other. You really don't need the spring but it needs to be replaced with a rod to
keep the plunger from moving. I installed 3 TCI valve bodies on three different trannys and I really think these are the
best units bar non. Transgo hasn't thought this whole thing out well and I am not sure of the manufacturers except their
price will floor you. TCI gives you everything and I do mean everything - accumulator rod, brackets and a reducing cap
that goes in the shift passage above the valve body. Price about $220.