I think my diff has gone?

[Metalman]

Well it had to happen at some point, it's something I have been waiting for every time I plant the right foot. So it would just be nice if you guys could confirm that what I have found is the diff before I order a quaife, and also is there anything else I need to change at the same time?
When driving the car it all seems fine until you take your foot off the accelerator but still in gear, I get a noise that sounds to me like a missing tooth on a gear or something. I jacked up the car and when spinning the offside wheel backwards making the nearside wheel spin forwards you get a nasty banging/clonking noise. (The driveshaft seems to jump a bit too.) When turning the offside wheel its exactly 180 degrees between the bangs.
Any ideas or tips for things to check would be great, otherwise I'll get a new diff on order and get stuck into gearbox removal.

2003 GTO3 5speed with standard diff.

[TuxMan]

Sounds like it , what's the milage ? Is it STD power ? Tux

[Metalman]

Hi tux, yes it's standard power as trevor warned me any more would make the diff go bang lol, it's done around 22000 miles. I dont mind replacing the diff as they're not expensive it's just the job of getting it out!

[jamescmr2]

def sounds like the diff doesn't it. sounds like you have had decent miles compared to some!

hope you get it sorted mate

James

[Metalman]

jamescmr2 said:

def sounds like the diff doesn't it. sounds like you have had decent miles compared to some!

hope you get it sorted mate

James

I hate to admit it but yes I think it's the diff, is that good milage then? I was just hoping I had missed something obvious but it looks like I'll be on the phone to order a new one in the morning.
It's not the driveshafts or support bearing as they've just been replaced.

[andygtt]

sorry to hear that mate... might be worth fitting the stronger bearings while you have it apart as that strengthens the box a lot... also oil cooling.

you just know that as soon as you do the diff you are going to search for power... new exhaust, intercooler etc etc

[andygtt]

BTW correct me if I am wrong but JamesMr2 is running a 5 speed box with 530bhp?... tuxman is running 490bhp!

[Metalman]

andygtt said:

BTW correct me if I am wrong but JamesMr2 is running a 5 speed box with 530bhp?... tuxman is running 490bhp!

Ah that's interesting, as you well know i have been collecting bits (your exhaust and intercooler, grants turbos) but i thought i needed the 6 speed box to take the power. Maybe i'll look into strengthening the 5 speed then as im itching to get these bits on the car.

[TuxMan]

The STD 5 speed box does not have a problem with power it's torque that kills it !!! Get the box done by my gearbox man fit a cooler and LSD and cap the torque at 420lbft and you will be fine , mines still sounds sweet after 5000 miles and over 900 track miles 350 in the last 3 weeks !!!! You need to do clutch as well but worth it while it's all out !!! Tux

[andygtt]

Whats you power target?

[Metalman]

I'm getting excited now i'm not really after BIG power like you boys are running and i dont know what's a realistic figure with the parts i have, would also do fuel pump and valve springs while it's out.

[TuxMan]

Ha ha bloody hell Andy we have corrupted him :-) :-)

T28 turbos
Valve springs
Timing back to STD
044 pump
Pro alloy intercooler
Bigger injectors
Exhaust

500 bhp here we come :-) :-) :-)

[Metalman]

TuxMan said:

Ha ha bloody hell Andy we have corrupted him :-) :-)

T28 turbos
Valve springs
Timing back to STD
044 pump
Pro alloy intercooler
Bigger injectors
Exhaust

500 bhp here we come :-) :-) :-)

You have indeed lol, after seeing daddysumos car on the rollers then grants and how good they sounded i've had the need to start playing with it. And as i now have all the expensive bits i may as well do the rest! I was going to look for a 3R to put all the bits on but there just doesn't seem to be any about.

[andygtt]

I personally would add cams to that mix so you can rev it harder thus more power, without more torque.

You always said it would be a shame to sell your car to go to a 6speeder as its so good

[Metalman]

Your right Andy, Im beginning to think I should stick with the car, after all I'd only be gaining the 6 speed and the headlights. I like the idea of changing the cams too, Im sure I'll be picking your brains a bit more wnen the time comes

[andygtt]

a real 500bhp noble is an absolutelly awsome machine... wont be cheap upgrade though but anything over 450bhp needs quite a bit.. even the 6 speeder should be beefed up and unless you ultimatelly plan well over 500bhp its looking like you can get away with the beefed up 5 speeder.