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so i have an r32 with an rb20 pushing about 150kw's i killed 3 rb20 boxes, the bearings in the center carrier plate failed in each one....

i decided to wack in an rb25 box, $1500 and alot of cursing later it was done and life was good :)

but then i decided to take it for a longer drive and after 45 mins i get this clicking noise coming from somewhere under the car!!!!!

the noise will only appear after a good 30-40mins of driving and it sounds nothing like the bearing noises i had with my rb20 boxes, it only appears when i have my foot on the go pedal its silent if im in gear and coasting.

what takes 40 minutes to warm up surely the box would be warm after 10 mins of 100kmph??

i was thinking maybe a tailshaft issue either the center bearing or the uni's? the shaft was modified by a workshop and also balanced...

i also got the shockproof shit in there which i think is all wank, the box is smooth as when its cold but slightly notchy when warm lol

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https://www.sau.com.au/forums/topic/287973-clicking-noise-when-warmed-up/
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Shockproof is a wank, I don't like that stuff.

What viscosity of oil are you using?

When you bought the box did you buy a second handy?

Does it make the same noise in all gears? If so then it is almost certainly diff or tailshaft related.

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