Gearbox Crunching

[Bass Junky]

Hi ppls.

Before anyone says "Do a search" I HAVE.

I got useful information.

BUT

I have an R34 gearbox in my GT-T (Funny that) and I have the following problem.

When chaning 'quite hard' I crunch into each gear. I'm talking split second changes.

Sometimes, changing into 4th from say 99kph I get a mild 'grunch' sound (halfway between a grind and a crunch) which I don't particularly like.

Now, people are going to say "Put in Redline Shockproof" and I probably will, but I'm wondering if anyone else has had the same problem and did they need to do anything to their box?

If not, how long has it lasted?

I know that the R34s have shot peened 1st 2nd and 4th gears, but that's more for strength than for anything else....

So, any takers?

[Lukas]

My R33 does exactly the same thing. Been doing it for about 3 months, not just when I am fanging, it does it all the time unless I change gears really gently. Don't know why either :confused:

[MANWHORE]

what it comes down to, is it seems, most, if not all skyline gearboxes seem to be notchy. If someone more knowledgeable is willing to comment, i believe the synchros get worn very quickly.

I get basically the same thing, and i've asked a person who rebuilds gboxes, and he reckons it'll just be like that again after like 20000ks or so. HE also says that r33 gtst boxes are very strong, and if i keep driving it like that, it should still last forever, almost - normal driving that is, not hamfisted drag shifting.

I've tried the redline shockproof and motul gear 300. I reckon imo, that gear oil is gear oil, and neither seemed to make any difference.