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Hi Forwardlookers,
A couple of weeks ago the 300 Club Intl listserver
group briefly discussed a change in the heat exchanger width within
the bottom tank of the 300C and 300D radiators. I requested feedback
as to what some of them have in their cars but got very minimal
response. I'd like to widen the request to all y'all. The
four-fold importance of this is in the last paragraph.
From that small sample this can be surmised:
Torqueflite cars for '57 started out with a wide heat exchanger (12.75" inches
between in/out fittings). During '57 production engineers felt this gave
too much cooling to the transmission fluid and a smaller (approx. 9.75") heat exchanger was employed. This
took place sometime between April and July production. From July on
all '57s built and all '58s appear to have used the smaller heat
exchanger.
If I can get some further input from several 1957
owners, I can narrow that down further. I need owners of 300C, NYer,
Imperial and Fireflight (lesser models have air cooled torqe
converters) to send me the seven digit part number stamped in their
radiator and am looking particularly for date code responses from " D7
" which is April of '57 to " G7 " which is July of '57.
If you have an earlier production radiator which is
NOT the 12.75" spacing or a later production radiator which is NOT the 9.75"
spacing I'd like to hear about that also.
Why is this important? Four
reasons: 1. Bringing your attention to date codes being meaningful in
engineering terms, 2. Authenticity for your restoration,
3. When ordering reproduction trans cooling lines in the aftermarket only
the wider spacing is made, 4. Perhaps most importantly there is a
probable direct tie in between performance and longevity of the early '57
torqueflites insofar as inadequate fluid temperature affected them.
All replies direct to me, not to the list please. I
will post poll results later on.
Thanks,
Wayne Graefen
300C Model Year Advisor to the Chrysler 300 Club
Intl.
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