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Old 04-06-2020, 05:48 PM   #7
40 Deluxe
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Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,778
Default Re: Zephyr overdrive into 1940 Ford?

Quote:
Originally Posted by skidmarks View Post
T5, shifts smother and less of a jump between gears. Car has a stock 8BA and a 3.55 rear and i dont use 1 st gear in the T5
None of the extra stuff with the overdrive on the T5 that the merc has

But you lose the instant kickdown feature of the old overdrive trans! Cruising along in O/D and need to pass in a hurry? Just floor the gas pedal and you've instantly downshifted without touching the clutch nor the shift lever! After you finish passing, just let off the gas an instant and you are automatically back in overdrive! Coming to a long downhill? Floor the gas to kickdown, pull out the lockout handle, and proceed down the hill in direct high with better engine braking. Cars with the Borg-Warner O/D usually had 4.11 or so gears. With a ratio of (I think) .72 in O/D, the effective axle ratio became 2.95 instead of 4.11. If you didn't like to shift around town, you just left the trans in second in slow traffic. If/when you got above 27 MPH just let off the gas for an instant and you were in overdrive second, good for 40-50 MPH.
That ol' overdrive had a lot going for it!
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