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Author Topic: Transmission Question (TH350)  (Read 3346 times)

Offline septantrionalis

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Transmission Question (TH350)
« on: February 20, 2017, 09:42:58 am »
I have a 1974 Chevy K10 with the TH350 transmission and NP203 transfer case.  What would happen if I accidentally shifted from Drive to 2nd gear while doing 70 MPH?  Is that even possible?  Will the transmission let me do that?  I wouldn't do it on purpose, but that column shifter knob is so easy to hit.
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Offline VileZambonie

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Re: Transmission Question (TH350)
« Reply #1 on: February 20, 2017, 02:25:04 pm »
You could over rev the engine
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Offline Stewart G Griffin

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Re: Transmission Question (TH350)
« Reply #2 on: February 20, 2017, 03:07:46 pm »
i don't think you can downshift from D to 2 without also pulling the lever towards you?
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Offline Irish_Alley

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Re: Transmission Question (TH350)
« Reply #3 on: February 22, 2017, 10:06:29 am »
on worn shifters you can stew.
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When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline travisr1988

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Re: Transmission Question (TH350)
« Reply #4 on: March 10, 2017, 12:22:46 pm »
That really depends on your engine speed at 70mph, on my truck 70mph in 2nd is around 4200rpm with a th350, 3.42:1 rear gears, and 29" tall tires. In my c20 that had 4.10s, th400, and 30.5" tall tires spun about 4500 in 2nd. Those numbers are from a calculator that was accurate when I had a tach.
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1979 Chevrolet Silverado C20 rclb cammed 355/th400/4.10 - sold
1977 Chevrolet Custom Deluxe c10 rcsb stepside 355/th350/3.42
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Offline Irish_Alley

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Re: Transmission Question (TH350)
« Reply #5 on: March 10, 2017, 12:48:56 pm »
arnt there some trans that have a safety backup just for this reason or are those just the electronic transmissions? ive never tried it with my 4l60e and dont plan to
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
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