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Old 04-22-2015, 07:22 PM   #1
damian559

 
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Red face Don't downshift from 5th to 2nd at 100mph

I tried downshifting from 5th to 4th but messed up and accidentally went into 2nd gear. It shot to 10,000 rpm and locked up the rear end. Took it to my shop today and pulled the valve covers off and I ended up dropping a valve and bending a pushrod. My heads are off and going to the machine shop tomorrow. I should have my car back on Friday, but it's a waste of $1300. That was going to be my money for my Welds and drag radials. Shit happens.
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Last edited by damian559; 04-23-2015 at 12:58 AM.
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Old 04-22-2015, 07:24 PM   #2
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Ouch!
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Old 04-22-2015, 07:31 PM   #3
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uhg, been there done that. I got off easy with just a pushrod. Just gave me an excuse to replace them all with something much better though
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Old 04-22-2015, 07:41 PM   #4
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Sorry to hear that. Thanks for the heads up.
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Old 04-22-2015, 07:41 PM   #5
EMB135Driver
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Why were you downshifting at 100 mph?
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Old 04-22-2015, 07:49 PM   #6
Homeless Man
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I thought the computer disabled things such as this from happening?
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Old 04-22-2015, 07:51 PM   #7
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Quote:
Originally Posted by EMB135Driver View Post
Why were you downshifting at 100 mph?
To go faster quicker? That's why I did it lol
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Old 04-22-2015, 07:52 PM   #8
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I thought the computer disabled things such as this from happening?
Rev limiter only works going up, not down
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Old 04-22-2015, 07:53 PM   #9
Homeless Man
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Did you not lose control when it locked up that fast or slide
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Old 04-22-2015, 07:55 PM   #10
Hurst
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Did that with a '79 Z/28 racing a Cutlass... Yea, never ends nice. LOL!
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Old 04-22-2015, 09:02 PM   #11
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Quote:
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I thought the computer disabled things such as this from happening?
A rev limiter can't do anything about mechanical over-rev's.
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Old 04-22-2015, 09:10 PM   #12
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The computer knows to block second and third for skip shift..... It should be able to block second from a destructive downshift..... The solenoids are there so I wonder why they haven't ever done anything with it. I'm sure you aren't the first to have done this. I had a 2004 silverado with a 5 speed and was wide open, went to bump 3rd to 4th at redline and accidently got second, rear tires locked up and the the tach went as far as it could. The truck only had a couple thousand miles on it and it ran great until I traded it in at 85k. Guess I got lucky....
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Old 04-22-2015, 09:21 PM   #13
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I'm sorry to hear about that. That sucks.

Side note: just out of curiosity, has anyone ever experienced when then go do downshift, and feels like you cannot put the shifter into gear? This is my first manual car and idk if that is a safety feature or something is wrong. For example: say I'm driving 60 in 4th, I go to downshift into 3rd, but it won't allow me to put into 3rd. I return the stick to neutral, then put it into 3rd No Problem. Is it something to do with RPMs, or speed? Or is there something wrong with the clutch? It doesn't happen all the time, just randomly. Idk if it's me doing spirited driving and expecting too much from the transmission, or its a safety feature. Thanks in advance guys.

Sorry to hijack!
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Old 04-22-2015, 10:10 PM   #14
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I bet you was playing with somebody and you finally decided it was time to get it over with so you down shifted but wrong gear. This sucks bad
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