Did I Just Kill My Gearbox?

[barnoon]

Hey guys,

Driving home tonight gave it a squirt in first put it into second, full throttle and then when it came onto full boost I hear BANG and the whole car jerks and theirs a massive rattle sound coming from the gearbox,

I quickly pulled over and turned the car off had a look underneath to see if anything was fallen off or anything but coudlnt see anything out of the ordinary, got back in the car started it, MASSIVE rattling sound coming from the gearbox on idle even when the car was in neutral, car very hard to get into gear, took off in first took off very hard just that massive constant rattle, everytime I tried to put it into second I just get a massive bang and the whole car jerks and it wont go in so I managed to baby the car home in 3rd (with that loud rattling noise still going constantly seems to ease up a bit when the clutch it put all the way in and the car is idling)

Ive booked a tow for the morning to get the car to a workshop but does it seem like the gearbox is gone?

Why do these things happen at the worst times was just preparing to put my new turbo on and fix some other things on the car

Edited July 31, 2006 by Dave69001

[Mr. Oizo]

if it's at idle (in neutral), its likely that it's the clutch and not the gearbox

because obviously nothing in the gearbox should be moving in neutral

does it still make the sound if you push the clutch pedal in?

[barnoon]

Hmm hopefully thats what it is mate I just replaced the clutch with a heavy duty one 2 months ago though so not sure why it would of caused this.

Yeah it does seem to go away if you put the clutch in and its idling but when I was babying it home whenever I put the clutch in as the car was going along it would still do it but I guess the gearbox would still have things moving if the cars moving right?

Edited July 31, 2006 by Dave69001

[wrxhoon]

Sounds like the g/box is gone, when in neutral the main shaft still turns . The only time it doesn't is when the car is not moving and clutch pedal pushed in.

[Mr. Oizo]

Sounds like the g/box is gone, when in neutral the main shaft still turns . The only time it doesn't is when the car is not moving and clutch pedal pushed in.

you learn something new everyday!

thanks for clearing that up

[barnoon]

Damn thats no good looks like ill have to sell my new turbo I bought to fix this as ive got no money how much do RB20 gearboxes go for these days?

Thanks for your input by the way guys

[rice_me_up]

to put it plain and simple:

if your car is rolling (clutch in OR out)- there will be a section of the gearbox that is moving.

if the clutch pedal is out, and its in neutral (regardless of rolling or not rolling) there will be a different section of the gearbox thats moving.

to get a very good understanding of how gearboxes work i reccomend this link:

http://auto.howstuffworks.com/transmission.htm

your description to me sounds like your gearbox has been raped.

my condolences for your loss (as much as i like to be right, i hope im wrong). i hate it when bad shit happens to pride and joys.

cheers. james.

EDIT: took me so long to write this up, your question has been answered before i finished! but atleast i supplied a good link! cheers.

[barnoon]

Cheers for the link mate its very good read

Will keep you all updated as to what the verdict from the workshop is tomorrow.

[Mandingo]

Dude if you are upgrading to a bigger turbo I would change to an R33 gearbox as 20 ones are fairly weak. Is a bit more expensive but better in the long run as its 1 less thing to worry about busting all the time.

[barnoon]

What is required other then the RB25 gearbox itself to do the conversion? Any idea how much all the parts needed for this go for?

cheers

[MANWHORE]

rb20 gearboxes are cheap as chips.

[dbo]

Shit bad luck dave and you haven't even been able to put my turbo on yet!!

Although R33 boxes are stronger, I can't see the need to upgrade to one unless your pulling some decent figures already, and plan to take the car alot further power wise.

FRom what i've been told you need the g/box itself obviously, approx $1500, get it fitted, and i'm pretty sure you also need a custom made tailshaft, and alot of other crap to get it working.. it's a costly exercise, but you would never have to worry about breaking the box again!!

[barnoon]

Yeah guys the gearbox was rooted as expected got it taken out today so need one asap if anyone has a RB20DET box in Sydney thats in perfect working order pm me please need one ASAP or I cant get to work

[Taso84]

Supra 6speed bro

[blk180]

Wheres the PICs Dave of broken boxs

[Suspense]

I got a rooted 33 box.... pretty sure fork selectors and 3rd/4th synchros are gone.... though havent opened it up yet...

PM me if your interested

[Guest 40th-edition]

my 33 box is starting to do the same.. man i want a good 6speed

[barnoon]

Got another second hand 32 box put in guys, seems rough like the old box tho 2nd gear is quite notchy when putting it in was told its probaly the actual gear shifter thats making it seem rough does this seem right?

[blk180]

Hey dave what gearbox oil did they put in.

[barnoon]

Not sure what its called man but it was the best synthetic one they had I think it was a Castrol brand? Ill ask when I see them again tomorrow.