noisy rb20 gearbox

[raasclaat]

Ive been getting some gearbox noise for some time now, just lately it is getting worse. Apparently this is relatively common in rb20's, has anyone heard/experienced similar?

Regardless, something has to be done, either pull it apart and diagnose - which involves possibly sending it away for a bit, or spending $800+ on fixing, or sourcing an r33 box as a replacement.

Has anyone had this problem and attended to it? Or know a place in perth to find an r33 box?

cheers

av

[caminperth]

I'd give it an oil change first. Have you tried that? Sometimes can clean it up for a while..

[raasclaat]

unfortunately yep. thanks tho cam..

that has previously worked a charm until now.

[Dsturbd]

Does the noise go away when you put clutch in ... May be the input shaft bearing

[raasclaat]

thx.

Yep Dsturbd, clutch in, no noise...clutch out and its grinding. 1st and 2nd gear are pretty noisy in drive too. My mate said the same thing about the bearing.

Im tossing up whether to spend time pulling the gearbox apart and getting replacements or get an r33 gearbox, i would hate for the rb20 to do it again. (not sure how common it is with rb20s)

Hopefully some have had similar experiences and can suggest one way or the other.

[Dsturbd]

Have got a 33 box makeing same noise... Its just normal wear my 32 box did same thing ... I have RECONDITIONED rb20 box for sale $900 fitted if you need one

[raasclaat]

thx dsturbd pm sent

[R32-GTS]

Yep, get used to it. When you give a rb20 box a hard time for a while they start to get noisy. Mine was dead quiet a few months ago now its starting to get rumbly. You can change the bearings but it won't fix it. It's the meshing of the gears. Just gotta live with it.

[raasclaat]

hm i think i had a chat to you at Works about this a couple of months ago R32-GTS - when we were playing with my headlights - you said you managed to quiet yours down a bit...bugger...its back huh?

[R32-GTS]

I just put Redline MT-90 in my box and its quitened it down a bit.

Quite alot actually. Its thicker than MTL thats why its quieter.

If you want it quieter use some thicker oil but the trade off is slower gear changes.

[Rb20_4valve]

yea ive had that problem with 2 gear boxs

just put up with it, its a rb box it will end up breakin anyway

[Dsturbd]

they only break from abuse ... When i got this box it was stuffefd from previous owner .. Never broken one yet and my box has done 160ks

[R32-GTS]

Nah , more likely your cars not making any power haha

:shake:

[nostalgik]

Get an RB25 box Simon. You know you want one. They are'nt flimsy

[R32-GTS]

Will get one as soon as the TD06 mashes this one too pieces hahah.

[nostalgik]

And mashes you're internals as well:shake:

[R32-GTS]

Nah its a RB20 not a RB25 haha :bahaha: :bahaha:

[Dsturbd]

I always change the oil after a drag meet or track day same as diff and the engine .. Keeps it fresh

[R31 POWER]

Where can I get Redline MT-90 G-box oil in perth.

[DCIEVE]

west racing, being one of the distributers are cheapest. in ossie park