2Nd To 3Rd Gear "chirp"/"groan" Sound

[maxzugkraft]

I'm getting a sound - like a low chirp/groan sound - when I change up (auto/manual) from 2nd to 3rd gear.

Recently changed my trans oil to Willall Lite when I noticed it. Did not have it with OEM trans oil.

Happens usually when cold, but happened today when it was hot too. So far, it's happened 3 to 4times in total.

Is this a bad sign? Has anyone had this problem? Does it need to be corrected?

Thanks guys!

2009 R35, Willall Cobb Custom tune, WR35TML, HKS Midpipe.

[g35me]

I have the same sound. Chirp is a good description. It's just one of many noises I am trying to track down and fix at the moment. I'll let you know if I make any progress.

[domino_z]

if it started after changing fluid, try going back to oem fluid

Edited October 31, 2012 by domino_z

[Martin Donnon]

Most all GTR transmissions may exhibit clutch chirp at some time in their lives. Its well documented, fairly common, and not harmful in any way.This can normally be dialled out by altering clutch capacity and touch points if need be. Its simply a friction property of the clutches.

If you dont like it, then back off the CC settings till it goes away.

Many threads on it with stock fluid, aftermarket fluid etc. in the US.

[maxzugkraft]

I was on cc=2 and tp = 0 before.

I've just dialled down cc to 1.

Will see what happens. Having had the Willall etune recently with more power, I was hesitant to do that as I don't want any clutch slip.

Hope cc=1 is enough clutch pressure. Whadya reckon, Martin?

[Martin Donnon]

Depends on the condition of the transmission mate

Should be fine!

[maxzugkraft]

Condition of transmission is good. It's only done 2x launches when it was stock standard ecu.

Never dared to launch it after that.

Hopefully all good, fingers crossed.

[Martin Donnon]

Dont be frightened of launching these cars. With the right software (LC2+) it doesnt bother them.

Mileage and the type of fluid used is the biggest indicator of transmission condition in the GTR rather than how its driven.

[domino_z]

+1 on launch, these dual clutch box's are different to the old single clutch automated box's which cry out in pain when launched

[maxzugkraft]

That's reassuring!

So is LC5 with R-R-Off OK to shoot?

Never tried a 4000+ rpm launch before.

[Wardski]

Keep VDC on or R mode

Edited November 1, 2012 by Wardski