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#1
05-12-2021, 03:43 PM
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TH-400 Factory Calibration Chart
I'm trying to determine factory calibrations for various Turbo-400 automatic transmissions and am looking for a chart or document generated by GM, Hydra-matic, or one of the Divisions.
Pete McCarthy's original book contains such a chart for 1970 Pontiac that includes such information as transmission application code, torque converter stall speed (or stall ratio), valve body part number, separator plate part number, governor part number, and full-throttle up-shift speed (in RPM). Would anyone have such a document for other years or know of any reference that contains that type of information? |
| The Following 2 Users Say Thank You to Rocky Rotella For This Useful Post: | ||
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#2
05-12-2021, 08:58 PM
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Subscribed
Following this thread.
A few months ago I researched this to death for My 68 Firebird. Bought a NOS governor and modulator. Was not cheap, but shifts exactly as I wanted. Trans has been redone by board member who did an Absolute Fantastic job some time ago. But never had the exact governor And modulator. There is a difference. Tried the governor kits but that was messy. Gerry
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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
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#3
05-12-2021, 10:05 PM
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Rocky, I had/have name of a Turbo Hydramatic engineer that will know this; if he is still alive and I bet he is. Send me note sometime.
Tom
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Tom Hand |
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