gearbox somehow changed from 1st to reverse at 60kmph - Page 2

Psycho Chicken · 31-10-2006, 08:19 PM

Quote:

Originally Posted by kyro_02

and i've had my car in reverse and it steps out a bit... not much but a bit

Yes in reverse traveling backwards. Not in reverse traveling FORWARDS.

Psycho Chicken · 31-10-2006, 08:20 PM

Quote:

Originally Posted by nicholas

mate its quite possible to do this wih=thout blowing box,
i did it 3 times at over 100kmh in my old xy with worked 302 clevo and Toughened c4.\
due to Mr Gasket shifter that had worn parts so when i banged it up to 3rd it went straight into reverse ,total burnout in reverse as car was still going forward on HWY, each time made adjustments and it would go great for a month or so then do it again. eventually i tossed shifter on ebay and installed stock type. never blew my C4 ,

You're comparing a toughened C4 with a stock BTR?

mcflux · 31-10-2006, 08:21 PM

Luke is actually suggesting that you would've had to have changed from "1" to "2" or "D" after you accelerated heavily in 1st.

Having the rears lock up while travelling straight shouldn't change the path of the car, just slow it down heaps.

But I'm repeating myself and others here...

kyro_02 · 31-10-2006, 08:24 PM

yer well i'm just saying what i experienced

the path would change if the road you're traveling on when you lock up is on a bit of a slant, i'd say

mcflux · 31-10-2006, 08:26 PM

how much of a slant are we talking?

Roads in general have a camber ranging from -3% to +6%. And urban streets tend to have SFA camber changes.

As for vertical slopes, roads generally have +/-5%.

You're grasping at straws here.

kyro_02 · 31-10-2006, 08:26 PM

Quote:

Originally Posted by Psycho Chicken

You're comparing a toughened C4 with a stock BTR?

anything is possible lol

kyro_02 · 31-10-2006, 08:27 PM

Quote:

Originally Posted by Ghia5L

how much of a slant are we talking?

Roads in general have a camber ranging from -3/100ths to +6/100ths. And urban streets tend to have SFA camber changes.

You're grasping at straws here.

this was flat road, but i read your post as if you were saying all roads are flat

anyways, nicklos said he has done it at 100kmph with a toughend c4... at that speed would have definately have a strong box, as i was goin 60kmph thus not as fast, anything is possible

mcflux · 31-10-2006, 08:30 PM

They pretty much are when it comes to camber. ;)

Rollin · 31-10-2006, 08:42 PM

Quote:

Dave is right. It will not go sideways if you plant it in reverse while moving forward.

They so do. Hasn't anyone ever pulled up the handbrake for fun when driving a sh!tter? Cars always slide one way or the other if you lock up the rear wheels, and probably would slide sideaways even more so in reverse under power, as one rear wheel would be 'pulling' the car to one side (because even LSDs dont transmit 100% drive to both wheels)

Kryo I think you should really get that linkage looked at....

mcflux · 31-10-2006, 08:44 PM

He's got a minispool though... equal power to both wheels, so the car shouldn't pull to either side.

LUXO_8 · 31-10-2006, 08:46 PM

Quote:

Originally Posted by Rollin

Kryo I think you should really get that linkage looked at....

he said the actual selecter went from "1" to "R"

would have to make its way through the gate, get past the lockout to do that....

Rollin · 31-10-2006, 08:59 PM

Quote:

He's got a minispool though... equal power to both wheels, so the car shouldn't pull to either side.

Does the car have a prefect 50/50 weight balance left to right? Don't you think the torque of the engine would have applied more downward force to one wheel than the other, giving them different levels of traction? (The torque of the motor is what makes SS diffs always kick the RHS wheel)

Quote:

he said the actual selecter went from "1" to "R"

would have to make its way through the gate, get past the lockout to do that....

He also said that his button is a bit cactus:

Quote:

Originally Posted by kryo_02

actually mine will only lock if i sit and fittle with it, button is stuffed or something..

my shifter does move a bit, bit too much probably... but anyways

Dezza · 31-10-2006, 09:04 PM

Quote:

Originally Posted by kyro_02

actually mine will only lock if i sit and fittle with it, button is stuffed or something..

my shifter does move a bit, bit too much probably... but anyways

My shifter was like that. It had worn out bushes that caused it to have heaps of sideways movement. It also meant the button wouldn't easily lock in either. I replaced it with Ghia5L's old one. Heaps better

I don't know how it could have gone into reverse though if you didn't touch the gearlever.

mcflux · 31-10-2006, 09:07 PM

Wow I never knew about the torque causing the RHS wheel to lift! That's cool as :P

I would've thought maybe the fuel tank being offset to the left would've done this?

I still find it hard to believe it'd do this, after all the directional force is wanting to pull in the opposite direction when travelling forwards yet having reverse selected.

mik · 31-10-2006, 09:15 PM

i did a nasty accidental into reverse in my old 76 f100 ambulance, the column selector moved fairly easily through the gear shift detent (well worn)i knocked it with my arm reaching for something on the dash board, sent here in a bit of a slide down the freeway,it stalled the engine...... i got it restarted and drove off no visible damage ......except to 20 years off my life, gave me some incentive to have a good look at the auto linkage and tighten it up abit and be a little more carefull, bound to be more movement in the motor and auto with old rubber mounts as well, all has some influences on these things

needaXYGT · 31-10-2006, 09:50 PM

i also thought you wouldve left your gearbox behind!

Xplode0185 · 31-10-2006, 10:10 PM

same thing has happend to me in ea basher i had but i had trees around me not gutters so worse damage. i was doing exactly the same thing as kyro and it just jumped into reverse itself only damage was the front lh gard that hit the tree the box was still fine

fast gt · 31-10-2006, 10:36 PM

I cant see how that can happen generaly autos have a lock system that stops you from going into reverse from drive.And the way i see it if you want to drive your car like a manuel you should have brought one or converted yours then this sought of thing wont happen.plus driving autos like manuels stuffs them up in the long run

smally289 · 01-11-2006, 12:13 AM

There is a speed over which the PCM wont allow the trans to engage reverse, but I can't remember what it is.

EFFalcon · 01-11-2006, 12:25 AM

correct, reverse will not engage above a certain speed.
just like you won't be able to engage 1st gear at 100km/h

LG · 01-11-2006, 01:05 AM

Quote:

Originally Posted by smally351

There is a speed over which the PCM wont allow the trans to engage reverse, but I can't remember what it is.

I thought that option was only introduced in BA?

EFFalcon · 01-11-2006, 01:07 AM

Quote:

Originally Posted by LG

I thought that option was only introduced in BA?

deffinately not the case, i've accidentally knocked my gear selector into reverse and the car deffinately didnt engage reverse.

kyro_02 · 01-11-2006, 02:05 PM

i did it last night, at about 50kmph this time (no acceleration) the wheels skidded for a second then stalled, image if i accelerated

i did it a few more times but sometimes it won't even go in reverse

some people thinkn i might have had copression lock up when i floored from 1st.. hit second.. then ecu got confused?? thus locking the rear up - i can't redline my rpm it automatically changes from 1st to second when it gets to 5k rpm(even when stick is still in 1st)
anyway this is a dead thread let is rest in peace

Rollin · 01-11-2006, 06:58 PM

Dude! Once by accident is bad enough! Don't keep on trying! Unless you like changing gearboxes....

SupahStah · 01-11-2006, 08:11 PM

Quote:

Originally Posted by Ghia5L

It should still want to straighten up, not kick out.

Thats no always the case... Ever hit the hand brake and have the **** end stick out? its not to do with the acceleration, its to do with traction and momentum.

Also, some gearboxes are stronger than others, and the gear box in his car *was* in very good condition. (Atleast it was when I had it). However after this ordeal I do beleive it will be very shot.
Used to be a very tough, tight box when I had it :(

SupahStah

SupahStah · 01-11-2006, 08:12 PM

Quote:

Originally Posted by kyro_02

i did it last night, at about 50kmph this time (no acceleration) the wheels skidded for a second then stalled, image if i accelerated

i did it a few more times but sometimes it won't even go in reverse

some people thinkn i might have had copression lock up when i floored from 1st.. hit second.. then ecu got confused?? thus locking the rear up - i can't redline my rpm it automatically changes from 1st to second when it gets to 5k rpm(even when stick is still in 1st)
anyway this is a dead thread let is rest in peace

Thats sad... That is like accidentaly hitting a car in a carpark; not happy with the damage you line the same car up for 2nds! ... idiot...

mcflux · 01-11-2006, 08:26 PM

Quote:

here is no way i could put it from first into reverse without knowing it.. this all happend in like 10 seconds !! and why would i do it on purpose its not like i have money growing off tree's ..

Quote:

i did it last night, at about 50kmph this time (no acceleration) the wheels skidded for a second then stalled, image if i accelerated

i did it a few more times but sometimes it won't even go in reverse

<Interviewer> So you ground your dirty feet into Eddie Murphy's new couch? Why did you do that?
<Rick James> No man I never ground my feet into that nigga's couch, what do you take me for? I've got standards man, why would I do a thing like that... ... Yeah I ground my feet into that nigga's couch! Why? Because he could buy a new one! Cocaine is a hell of a drug!

And you're a smacktard for repeating the process.

Supastah: No I haven't applied the handbrake to see what happens to the rear. What speeds are we talking about here, and do you mean with the car travelling straight with both wheels on bitumen?

SupahStah · 01-11-2006, 08:48 PM

Quote:

Originally Posted by Ghia5L

<Interviewer> So you ground your dirty feet into Eddie Murphy's new couch? Why did you do that?
<Rick James> No man I never ground my feet into that nigga's couch, what do you take me for? I've got standards man, why would I do a thing like that... ... Yeah I ground my feet into that nigga's couch! Why? Because he could buy a new one! Cocaine is a hell of a drug!

And you're a smacktard for repeating the process.

Supastah: No I haven't applied the handbrake to see what happens to the rear. What speeds are we talking about here, and do you mean with the car travelling straight with both wheels on bitumen?

Well, the handbrake question was retorical.

At 60km/h, change of momentum. (The rear will loose traction). It does make a difference that he is not accelerating, but once the rear has no traction it wont drive streight. Not nessisarily go around, but get a little out of shape. And if it was in reverse, there would have been a fair bit of torque shift, and probably would have helped shift it out of shape.

Well, thats what I reckon anyways. I'm no expert though lol
I didnt mean to offend or anything Ghia5L, jus jumping in with an explanation lol

XR6_661 · 01-11-2006, 09:09 PM

Maybe you hit the brake :-P

mcflux · 01-11-2006, 09:09 PM

Nah mate I didn't see it as offensive at all. I find Kyro's blatant abuse of an E-Series as offensive though :P

All I see a car doing, if it is travelling in one direction whilst its rear wants to travel in the opposite direction (and the car maintains a straight course), is merely slow down.