Gear Box Noise...

Wasabi · tinkerer Joined: 08 Jul 2002 Posts: 98

when in neutral, I lift my foot off the clutch and this mass grinding noise comes from inside the gearbox, is this the thrust bearing? or something else...??

Also, how much work is it to replace the whole rear axle in a wagon/ I have mega backlash in mine and whenever the wheels spin, say in the wet, theres just a mass of thumping that comes from the rear... And it also thumps hard if I change gears quickly... Its crap

Wasabi¿

MissPinkGemi · tinkerer Joined: 05 Nov 2003 Posts: 104

Its the main bearing thats your problem. Mine used to do it too. Where as you can easily replace the thrust bearing when the gearbox is out the main bearing replacement actually requires you tear the whole damn thing apart to get to it. Have you replaced the thrust bearing?

Wasabi · tinkerer Joined: 08 Jul 2002 Posts: 98

Nope, I havent replaced it or anything....could it possibly be the clutch plate? Could that be stuffed aswell??

wasabi¿

MissPinkGemi · tinkerer Joined: 05 Nov 2003 Posts: 104

i dont know about that one... I got a new clutch kit at the same time as i got all the bearings replaced. And the noise disappeared. Could have been a combo of things...

GEMTEC · tinkerer Joined: 02 Aug 2003 Posts: 216

theres a good chance that it would be your throw-out bearing mate. by the sounds of how you describe it, im pretty sure. If it is, it can easily be replaced. but just make sure that when its time to replace it, you replace all three items (clutch plate, presure, and throw out bearing) because it will save you time in the longrun. i think a replacement clutch kit is around the $120 mark from autobarn.
cheers

MissPinkGemi · tinkerer Joined: 05 Nov 2003 Posts: 104

My mate got a replacement PBR clutch kit from Rocca Brothers/Supercheap $68!

GEMTEC · tinkerer Joined: 02 Aug 2003 Posts: 216

oh tru? thats an alright price. was that a trade in with the old pressure plate though? but the again, that goes to show how much of a rip off merchant autobarn really is! hahaha

Poida · Posted: Fri Nov 28, 2003 2:47 am Post subject: Re: Gear Box Noise...

Most likely it's a bearing in the gearbox. It could be a mainshaft bearing or an input shaft bearing.

It could also be a clutch throwout bearing if the clutch in incorrectly adjusted and never disengages. This bearing should be inactive when the clutch pedal is not being pressed.

One bearing often forgotten is the clutch shaft pilot bearing (spiggot bearing) thats pressed into the end of the crankshaft. This is unlikely to be your problem but if you change the gearbox, replace this one too.

If a bearing inside the box turns out being the culprit, it's probably time to replace all the bearings. It will probably be more economical to replace the gearbox with another second hand one.
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