I shifted into reverse doing 80mph (dont ask) please help...

Hi all, this is my first time on the board, just looking for some advice, i shifted into reverse doing 80, dont ask why just feel free to mock me, so the car slammed to a stop locking up for atleast 100 feet and i rolled off the road, i had to restart the car and it seemed fine, i drove the 60 miles left on my road trip and i didnt encounter any problems, this happened about 12 hours ago and i have driven it twice since then...

the idle seems a little rough, but not sure... what problems can i look forward to having and what exactly did i damage, thanks for any help in advance

bump

Please don't bump your thread only 6 minutes after originially posting it. Someone will answer it eventually, you just have to wait for them to do so.

Having that said, what year/make/model is your car? Is it a stick or an auto?

Well, my first response is; way to go dipstick :) In general what you did was force the engine to stop because you made the transmission add enough force in the opposite direction to stall it. The engine is most likely unaffected.

The transmission took a serious thermal hit. Most automatic transmissions are capable of handling that much stress. If it operates normally I wouldn't worry too much about it, but I would check the tranny fluid. If its anything other than blood red, replace it. If it smells burnt, replace it.

Basically, if all things operated as they should have, you didn't damage anything, but you took about 30,000 miles off the life of the tranny. The friction material inside the tranny is much like your brakes. Its designed to apply friction over a period of time. Since you just used that friction to stop your engine, its like you just put it through a marathon.

So, if it operates properly from now on, you shortened its life. If it doesn't operate properly, consider a rebuild or replacement.

ec, thanks for the etiquette tip, i gues i'm used to faster moving boards

curtis, that is great info, thanks

my car is a 98 nissan 200sx, automatic...

i just had the tranny fluid replaced 2 days before the road trip, i will check it right now thanks...

LMFAO!

Nice one slick!

my friend did that, but at like 145, he was racing on a track, hit the straight with a 5-speed, dunno how he did it, it was a nissan with a gate where rev. is in the place where 6th would be on a 6-speed, it had like 350bhp, it broke the driveshafts, an destroyed gearbox + internals, big money to fix it. i saw some one on a program about the gumball, who shifted his M3 in to 2second @ 100mph.

can anyone give me an estimate what a repair or replacement cost, just so i know i'm not getting hosed

can anyone give me an estimate what a repair or replacement cost, just so i know i'm not getting hosed

A run-o-the-mill transmission rebuild would be like $1200, but might be as much as several thousand.

That's werid. Most auto equipped cars these days are designed so that if you do put in into revberse while you're moving foward, It'll just stall the engine and disengage all the clutches in the tranny. That's what MINE did at least :D

Right, but the force required to stall the engine is what kills the clutches. Its not like it kills the ignition and shifts the tranny for you, it uses the friction material in the tranny to push in the reverse direction on the crank with enough force to stall the engine... at which point you lose hydraulic pressure and the clutches usually disengage. Still, at 70 mph or whenever the engine stalled can still do significant damage to a free-wheeling automatic.

Imagine having two grinders face to face spinning the same way, then all of a sudden reversing one. They would eventually stop, but the damage that happens until they stop can be poopy. :)

nonono, my car acutally just shutoff. If i didn't know any better, i woulda thought it just just stalled in neutral. Im 99% sure it's programmed to do that should one pop into reverse while moving forward (with the mechanics inside of the transmission and the electronics of the car).

yes, but what curtis is saying is that for the force to get to the point to shutoff is still bad for the tranny.

but i'm saying the transmission isn't what's causing the engine to shutoff, it's the programming of the PCM, and the activation of reverse valve + positive speed governer pressure = disengaging of all clutches. Basically it went into neutral.

yah, but neutral wouldn't stall a car....it probably went into reverse (or tried to) for a split second maybe?

Not even a split second. I would have very much noticed, considering i find just the operation of the torque converter clutch aggrivating enough as it is. There was no shudder, skidding, grinding, pooping of parts, popping, banging, whizzing, sqeaking, squealing, howling, or breaking of parts. the car just coasted. I think it went something like this:

Drivn' drivn' drivn.. accidently pop into reverse

*4T60E* aww shit, this dumb$%@& just put me in reverse meng, i'm letting all of my clutches go!
*LQ1* Yeah, good idea. It says here in the "EMERGENCY HANDBOOK OF STUPID DRIVERS" that i should shutoff at this point, and we can coast.
*4T60E* Good plan man.
*LQ1* Do it to it!


excpet this happened in aobut 1/1000'th of a second.

Now that's funny :D

I dont have an Emergency Handbook of Stupid Drivers, but I have been know to use an Emergency Handsignal for Stupid Drivers.

thanks for the great response guys, i am experiencing slightly rougher shifts and am getting a little shuddering at idle, my fluid was replaced 2 days before this happened, should i just replace it anyway or is there anything else i can do to better my situation, again i dont mind the mocking, it is expected, lol

another question...

if i go to a repair shop and tell them this happened, i feel they are just going to automatically say i need to repair it... is there something specific that will be wrong with it so i know that i'm not getting screwed?

i would just continue driving it for now, see if it gets any worse or better. Once it starts dropping gears though, that means rebuild/replace.

Well, my first response is; way to go dipstick :) In general what you did was force the engine to stop because you made the transmission add enough force in the opposite direction to stall it. The engine is most likely unaffected.

The transmission took a serious thermal hit. Most automatic transmissions are capable of handling that much stress. If it operates normally I wouldn't worry too much about it, but I would check the tranny fluid. If its anything other than blood red, replace it. If it smells burnt, replace it.

Basically, if all things operated as they should have, you didn't damage anything, but you took about 30,000 miles off the life of the tranny. The friction material inside the tranny is much like your brakes. Its designed to apply friction over a period of time. Since you just used that friction to stop your engine, its like you just put it through a marathon.

So, if it operates properly from now on, you shortened its life. If it doesn't operate properly, consider a rebuild or replacement.




DO NOOOOOOOOOOOOOOOOOOT REPLACE YOUR FLUID YOU ARE CRAZY ARE YOU TRYING TO BLOW THIS GUYS TRANS UP, EVERYBODY AND THER MOTHER KNOWS YOU NEVER CHANGE THE TRANS FLUID INLESS YOU DO IT ON A REGULAR BAIS.. COME ON NOW TRANS FLUID IS LIKE THE BLOOD IN YOUR BODY, HAVE YOU EVER HEARD OF SOMEONE DRANING ALL THE BLOOD IN THE BODY AND GETTING NEW BLOOD... AND LIVE !

DO NOOOOOOOOOOOOOOOOOOT REPLACE YOUR FLUID YOU ARE CRAZY ARE YOU TRYING TO BLOW THIS GUYS TRANS UP, EVERYBODY AND THER MOTHER KNOWS YOU NEVER CHANGE THE TRANS FLUID INLESS YOU DO IT ON A REGULAR BAIS.. COME ON NOW TRANS FLUID IS LIKE THE BLOOD IN YOUR BODY, HAVE YOU EVER HEARD OF SOMEONE DRANING ALL THE BLOOD IN THE BODY AND GETTING NEW BLOOD... AND LIVE !

1 - No, you can change the fluid.
2 - Don't type in all caps.
3 - This thread died a long time ago. if it's more than 3 months old it's dead. don't bring back old threads.

DO NOOOOOOOOOOOOOOOOOOT REPLACE YOUR FLUID YOU ARE CRAZY ARE YOU TRYING TO BLOW THIS GUYS TRANS UP, EVERYBODY AND THER MOTHER KNOWS YOU NEVER CHANGE THE TRANS FLUID INLESS YOU DO IT ON A REGULAR BAIS.. COME ON NOW TRANS FLUID IS LIKE THE BLOOD IN YOUR BODY, HAVE YOU EVER HEARD OF SOMEONE DRANING ALL THE BLOOD IN THE BODY AND GETTING NEW BLOOD... AND LIVE !

Uh, yeah you can. Its not like the blood in your body, its hydraulic fluid. It gets dirty, and in his case he destroyed it. Changing all your tranny fluid is not dangerous, that's an old wive's tale.

Closed. this thread is really old.