Heya
Maybe it’s me being paranoid but my gearbox sounds like its got louder.
I assumed it was a clutch release bearing until I jammed my brain into first gear, and its noisy with the clutch up, winding down as I dip it, so finger points to input shaft bearing?
I get a slight whine in 4th, but it shifts sweetly enough and stays in gear fine. Am I being paranoid or is it a known thing?
T
broke my 4th gear at my victory at Lotuscupeurope at redBull circuit. No noise before - just one big bang and all the teeth were gone 
Luckily it was 3 laps to the checkered flag and my 6th gear lasted till the end.
Bad Luck when its a JDM gearbox - then its expensive
what oil are you using? The oil in honda boxes gets very hot.
not 100% sure, so it could be just low.
Will get it changed anyway I think.
what gearbox oil does everyone use in the K20?
I use this in mine…
Cool, how much does it swallow?
Depends if you has oben Diff or use a 1,5 LSD!
I use a Cusco 1,5 LSD with Castrol SAF XJ
Box goes up to 110� C
nah open diff, so 1.5L is fine.
Going to use Motul Gear 300
Ok, well that job stinks.
Paltry 1.2-3 L came out of it, rest seems to be on the casing and rear tray. Seems the input shaft seal is lunched. Thought I’d fill it anyway so I can get it to track club for a proper look over, swallowed 2L of fluid and even then didn’t dribble out of the filler hole.
Suppose question now is if I get the clutch done while the box is out. Hmm.
If the input shaft seal in lunched, you may find your clutch is contaminated anyway.
yeah quite probably, will know more once the box is off.
If the box is coming off then a fresh clutch is a no brainer
Well 2.1-2L of Motul Gear 300 and it’s not grumbly, still can hear it’s in motion but sounds much happier.
Downside, I only fetched 1.3L out of the catch tray/bottle. Obviously there was still probably a healthy coating in the catch tray there is no doubt it was down on fluid. Scuffers suggested to check the shaft seals, clean n dry. I’ll just have to keep an eye on it.
Turns out it was just a leaking bung round the front of the box, guys at Track-Group found it.