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Author Topic: Trivia # 9  (Read 1597 times)
Griff in Fairbanks
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« on: February 01, 2010, 10:47:37 AM »

Cars and light trucks with early versions of Mopar automatic transmissions could be push started.  What made this possible and why did Mother Mopar get rid of it in later versions of automatic transmission?
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Charlie1935
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« Reply #1 on: February 01, 2010, 04:54:05 PM »

I think it was because they had rear pumps as did most of the others.
Have no idea why they changed unless it was to cut cost.
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Griff in Fairbanks
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« Reply #2 on: February 02, 2010, 10:45:38 AM »

I think it was because they had rear pumps as did most of the others.
Have no idea why they changed unless it was to cut cost.
That's most of the answer.  They could be push started because the transmissions had a second pump, in the back of the transmission, driven off the output shaft.

And, yes, Mopar got rid of the second pump to cut costs.

However, what factor allowed them to cut costs by getting rid of the second pump?
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Charlie1935
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« Reply #3 on: February 06, 2010, 08:02:02 AM »

Possibly a safety factor was considered because you had push them pretty fast to start them.
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Griff in Fairbanks
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« Reply #4 on: February 06, 2010, 12:38:45 PM »

Possibly a safety factor was considered because you had push them pretty fast to start them.
Nope, they got rid of the second pump because electric starter and battery reliability improved to the point where push starting was rarely necessary.

I'm going to give it to you, Charlie, 'cause you got most of the answer.
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Charlie1935
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« Reply #5 on: February 06, 2010, 12:43:34 PM »

Gotta start diggin'.
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