Yes, but if so, it's certainly not likely the original tranny. There
were only 15 installed in '66 (and I would wager they went into racing
Corvettes). For every year they were offered, they were always a
super-low quantity factory installed item.
Additionally, the OP only mentioned grinding when starting cold - as I
understand the M-22, it was noisy all the time, all temps, all weather,
all day, all driving conditions... I also seem to recall reading that
Chevy discouraged dealers from selling the trans to customers due to the
noise - didn't want customers who couldn't live with the characteristics
- maybe was even a COPO (?) item (special order/approval only). Twern't
called "rock crusher" fer nothin'. (BTW, "Rock Crusher" was the actual
name Chevrolet used for the tranny).
'67BB & '72BB
"To know the world intimately is the beginning of caring."
-- Ann Hayman Zwinger
Yep, my neighbors used to tell me what time I got home at night. <g>
Between the built engine in my GTO and the Rock Crusher, their walls would
vibrate when I pulled in. It was always a kick on the weekends, as soon as
I'd lift the hood to start working on it, all the grown men would venture
over to see what I was putting in that week. While they'd yell at me to
slow down when they were with their wives, they all loved that car. For
clarification, I never sped through neighborhoods, but as loud as it was,
people always thought it was going faster than it was.
!993 Corvette Convertible
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