Going from Drive to Reverse on the freeway...

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Old Apr 14, 2011 | 11:27 AM
  #41  
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^6mph.
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Old Apr 14, 2011 | 11:47 AM
  #42  
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Kinda like when you try to downshift at high speed. The ECU doesn't allow it and just stays in your current gear.
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Old Apr 14, 2011 | 11:56 AM
  #43  
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^ i wish the computer limited my downshifting.

I accidentally over revved and was scared shitless that I broke something.
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Old Apr 14, 2011 | 12:31 PM
  #44  
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Originally Posted by Aman
MT reverse gear isn't synchro'ed, right? So what would happen if you tried to engage reverse while traveling 65mph in say, 3rd or 4th? No lockout then.
I don't even own a TL, so i'm just trolling, but I believe this is possible. Unless Bearcat94 quote above omitted the part where it said there's a reverse lockout going from 3rd to R or from 2nd to R etc. It just said there a reverse lockout going from 5th to 6th. I only have experience with 5spd car, there is only a reverse lockout when you're in 5th gear. It is possible to engage into reverse from any other gear though.
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Old Apr 14, 2011 | 12:46 PM
  #45  
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In the late '80's or early 90's there was an Oldsmobile commercial where they did full throttle shifts from reverse-drive-reverse-drive to show how durable the trannys were. The car remained motionless, as I believe they were at the Salt Flats, and the wheels just kept spinning.
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Old Apr 14, 2011 | 12:47 PM
  #46  
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From toying around with various MT cars at the autoshow, the lockout seems to be only from 5th to 6th/reverse. In pretty much all of the cars, I could go from 3rd and fourth to reverse.

IMO 3rd at least should have a reverse lockout as well, for the skip-shifters.
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Old Apr 14, 2011 | 09:33 PM
  #47  
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I had a coworker that was driving his '72 Dodge down the hwy at about 50 mph. Someone cut in front of him from a side street. His "emergency stop" procedure consisted of slamming it into Park! The parking pawl held but the 318 engine didn't. It spit out two rods and burped up a few valves for good measure.
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Old Apr 14, 2011 | 09:50 PM
  #48  
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^1+ even at slow speed...
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Old Apr 14, 2011 | 10:03 PM
  #49  
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Originally Posted by Too Many Hobbies
I had a coworker that was driving his '72 Dodge down the hwy at about 50 mph. Someone cut in front of him from a side street. His "emergency stop" procedure consisted of slamming it into Park! The parking pawl held but the 318 engine didn't. It spit out two rods and burped up a few valves for good measure.
That wasn't park that he hit, maybe first gear. Park is the same as neutral but it engages the parking pawl which has nothing to do with the engine. Now sure why he would want to stop with only the rear tires when he could have hit the brakes and used all 4.
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Old Apr 14, 2011 | 10:34 PM
  #50  
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Originally Posted by v_do_la_m
I don't even own a TL, so i'm just trolling, but I believe this is possible. Unless Bearcat94 quote above omitted the part where it said there's a reverse lockout going from 3rd to R or from 2nd to R etc. It just said there a reverse lockout going from 5th to 6th. I only have experience with 5spd car, there is only a reverse lockout when you're in 5th gear. It is possible to engage into reverse from any other gear though.
Originally Posted by Aman
From toying around with various MT cars at the autoshow, the lockout seems to be only from 5th to 6th/reverse. In pretty much all of the cars, I could go from 3rd and fourth to reverse.

IMO 3rd at least should have a reverse lockout as well, for the skip-shifters.
Originally Posted by Aman
MT reverse gear isn't synchro'ed, right? So what would happen if you tried to engage reverse while traveling 65mph in say, 3rd or 4th? No lockout then.
For MT, it's speed based and Reverse is totally blocked (from any gear) starting at 12 MPH. Reverse can be selected once speed drops back to 9 MPH or lower.


Last edited by nfnsquared; Apr 14, 2011 at 10:41 PM.
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Old Apr 14, 2011 | 11:09 PM
  #51  
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Very informative. Thanks.
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Old Apr 14, 2011 | 11:38 PM
  #52  
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Originally Posted by Aman
MT reverse gear isn't synchro'ed, right? So what would happen if you tried to engage reverse while traveling 65mph in say, 3rd or 4th? No lockout then.
the reverse lockout iirc locks out at a certain speed, completely independent of what gear the car is in currently (since the computer doe not know what gear it is exactly, it can only guess, depending on how much the clutch is being slipped)

BUT, not if it does not work (which mine did not for about a month after i had swapped to a 6spd) you gotta be careful though (like after swapping i was very HESITANT of going into 6th gear cause i did not want to hit reverse [even shifting to 5th, the lever would go all the way over, if you push too hard/far, had to let it move back over to line up with the 5th gear slot]; i already blew a motor like a month before hitting 2nd instead of 4th gear, while shifting from 3rd at red line, THANK GOD for warranty

Originally Posted by I hate cars
If it allowed you to attempt to shift to reverse, it would probably just grind. The odds of getting it into gear are slim.

The most embarrassing manual I've driven was a Pantera. Reverse pattern and no reverse lockout. I must've looked really cool when I thought it was in first but it was in second and I nearly stalled it with a ton of people watching.
but still very possible though

Originally Posted by YeuEmMaiMai
the auto in the TL will not go into reverse when moving forward at significant speed. the ecm will refuse the request
ecu has basically nothing to do with engaging reverse, it's all hydraulic, and with a significant governor pressure inside of the tranny, it will not allow the transmission internally to engage reverse (which equates to roughly 6 mph)

Last edited by friesm2000; Apr 14, 2011 at 11:41 PM.
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Old Apr 15, 2011 | 02:56 AM
  #53  
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Originally Posted by friesm2000
ecu has basically nothing to do with engaging reverse, it's all hydraulic, and with a significant governor pressure inside of the tranny, it will not allow the transmission internally to engage reverse (which equates to roughly 6 mph)
Transmisison is 100% solenoid controlled so yes the ECM locks the reverse gear out gear out. The solenoids control the shifting. Please see previous page......for the post showing acura's statement regarding the issue.
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Old Apr 15, 2011 | 07:30 AM
  #54  
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Originally Posted by Bearcat94
Not sure about the auto, but the MT have reverse lock out.

I'd expect the AT to have something similar.
troof... I know for a fact MT have reverse lockout. I had an 06 RSX-S that had K-PRO, but the ECU model I was using did not have a reverse lockout. I mistakenly put my car into reverse trying to go to 6th gear on a highway going about 65mph, and it literally scared the shit out of me because its a sound you never want to hear.

I sold that ECU within a week and got the correct one. I tried it all over again on the highway just to make sure I was safe.
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Old Apr 15, 2011 | 12:19 PM
  #55  
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I literally just did this by a fluke accident in a 2010 Escape, but into Park from 60mph. I was hauling lumber (4x4 posts) and they were in the back with the seats down. I was driving leaving plenty of distance, when the car ahead of me slammed on the brakes, smoke and all, so I hit the brakes pretty hard but not slamming. Well, one of those posts came from behind my seat and slammed into the gear shifter from behind and just forced it into park (my secure load was as secure as I thought) causing a whining and I couldn't get it out of park until I stopped. That post hit it so hard mind you that the gear shift moved all the way up to park without anyone engaging that button to unlock it. - Everything seems fine so far....
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Old Apr 15, 2011 | 02:39 PM
  #56  
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As a kid (16-18), I used to throw my 82 Malibu in reverse all the time while moving. Never tried it above 40 but it was always fun doing it in parking lots to see how long of a J mark you could leave on the pavement. The worst damage i ever did to it was twisted a axle.
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Old Apr 15, 2011 | 02:42 PM
  #57  
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^sounds like a maneuver that my dad tried with a chevy blazer called the J-hook.
Accelerate in Reverse and swing the car to the left, while putting it into drive.

we crashed.
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Old Apr 15, 2011 | 04:50 PM
  #58  
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Originally Posted by justnspace
^sounds like a maneuver that my dad tried with a chevy blazer called the J-hook.
Accelerate in Reverse and swing the car to the left, while putting it into drive.

we crashed.
I've done that probably 100 times. It takes a while to get it perfect, you have to shift the trans into drive right as you cut the wheel to keep it flowing smoothly. As for just skidding, the e-brake worked well. My friend used to have a big '86 Dodge Ram van when we were 16-19yrs old. We would come up on people at redlights and hit the e-brake, skidding up to them with the van fishtailing and then hit the regular brakes to actually stop the van in time. That thing was unflippable. We would take it out at night with the purpose of flipping it and never could. That thing has been spun out, off roaded, driven in the ocean, driven over lawns, jumped, and generally abused more than any van in existence.
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Old Apr 18, 2011 | 02:29 AM
  #59  
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well I never did this. but I've stalled my moms automatic yaris lol... sounds stupid right? but when you quickly shift from reverse to drive the car stalls.

Ive done it when getting out of a parking spot and when i got out i put it into drive without stopping and the car stalled lol...
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Old Apr 18, 2011 | 02:43 AM
  #60  
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Well thats like the easiest question if youre going 65+mph and suddenly you shift to park this will happen.... You'll meet God and he'll ask you "What tha Fuck Were U Thinking Of"?
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