« previous next »
Pages: [1]   Go Down

Author Topic: Transmission Question (TH350)  (Read 2319 times)

Offline septantrionalis

  • Newbie
  • Posts: 52
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.
Logged

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19022
Re: Transmission Question (TH350)
« Reply #1 on: February 20, 2017, 02:25:04 PM »
You could over rev the engine
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Stewart G Griffin

  • Senior Member
  • ****
  • Posts: 3324
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?
Logged

Offline Irish_Alley

  • Tim
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 13319
  • Family is not an important thing. It's everything.
Re: Transmission Question (TH350)
« Reply #3 on: February 22, 2017, 10:06:29 AM »
on worn shifters you can stew.
Logged
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

Offline travisr1988

  • Frequent Member
  • **
  • Posts: 283
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.
Logged
1979 Chevrolet Silverado C20 rclb cammed 355/th400/4.10 - sold
1977 Chevrolet Custom Deluxe c10 rcsb stepside 355/th350/3.42
Vortec heads lunati cam edelbrock intake headers

Offline Irish_Alley

  • Tim
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 13319
  • Family is not an important thing. It's everything.
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
Logged
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
Pages: [1]   Go Up
« previous next »