4th Gear Ratio Seems Off?

[Sneakyazn]

hey guys sup! just needed some advice / help

i get a faint "grind" when changing into 4th gear only during 6-7rpm however when i change below that its fine and normal and theres no issue's, changing to any other gear at high rom's there isnt an issue and its all good except for 4th gear i would explain it as a "faint" grind as if some one didnt change gears properly and didnt put the clutch down but not as bad... yes i even made sure the clutch was fully down before going up in gear from 3rd to 4th gear and it still happened at those high rpm's otherwise anylower rpm below 6 is fine so basically is my gear ratio's out or is it my clutch...(doubt it but a possiblity) and if you do know what the problem is... whats the cost and who is it best to go to to get it done i live north side of the river. ( bahahahahaha awww shit i hope its not expensive but when it comes to gear box's ... ='( .... )

anyways any help is appreciated, and HAPPY NEW YEAR!

[MYRB30]

Sounds like a syncro not doing its job properly.

Got fresh oil in the gearbox? Correct grade??? How old????

[hoony]

if you're shifting at 6k+ RPM in 4th gear dude you must be going pretty damn fast...

if that's the only time i wouldn't be phased, lol i assume you don't drive that fast all the time?

[-Dukes-]

Skyline gears boxes are like that.

[NA_Goodness]

Mine does the same thing, and its the synchos going. I wouldnt worry about it, too much money pulling it all apart just to fix that. If the box goes, fix it, but mine has been doing it all year and it still works fine any other time

[mitchy_]

Skyline gears boxes are like that.

rofl, no they don't all f**k the synchro's.

but yes, that does sound like the synchro's on fourth going..

you can try some fresh oil, but it will only mask the problem for so long.

[Sneakyazn]

if you're shifting at 6k+ RPM in 4th gear dude you must be going pretty damn fast...

if that's the only time i wouldn't be phased, lol i assume you don't drive that fast all the time?

hhahahaha i drive fast all the time an this is the 1st time its happened an that's why im asking these questions cause its never happened b4 hahaha yea dont think theres fresh oil in the gearbox... but umm say if it blows... now i highly doubt that... "Touch wood" how much would it cost to replace or repair or get a good working gearbox in or would i be better off upgrading while im at it... i am looking at modding the car since i have a grand to go to paying it off... and well its time to go nuts... ive had the car for a year its a 95 model an ummm mmm yea.... ive heard that its common for R33's gearbox's sync's to go a bit funny... any rough ideas on costs?

once again guys thnx for all the info u share appreciating it ^.^

Edited January 3, 2009 by Sneakyazn

[MYRB30]

Change the oil before you go wasting much more time and stress yourself more

[bubba]

The only thing to upgrade to is a PPG gearset or something similarly expensive, I highly doubt you're going to blow your box up though.

[Harry-Hotpants]

The only thing to upgrade to is a PPG gearset or something similarly expensive, I highly doubt you're going to blow your box up though.

y would u jump to such an extreme scenario? firstly a ppg is a straight cut box with no synchos just dog rings and not really suitable for street driving due to the whining they make and roughness of the gearchanges. aksi they cost like $10k. all u need to do is put redline shockproof gearoil in it for now that will stop the grinding and prolong the smoothness of ur box. once the synchos get bad enuff that the oil doesnt make a difference anymore then u should look at getting ur syncho set replaced. sure its a lil pricey but it will feel like u are driving a brand new car.

also if ur interested in upgrades before u look at the ppg gbox there is the option of eg. os giken gearsets. last tiem i looked liek 3k from japan

[mitchy_]

y would u jump to such an extreme scenario? firstly a ppg is a straight cut box with no synchos just dog rings and not really suitable for street driving due to the whining they make and roughness of the gearchanges. aksi they cost like $10k. all u need to do is put redline shockproof gearoil in it for now that will stop the grinding and prolong the smoothness of ur box. once the synchos get bad enuff that the oil doesnt make a difference anymore then u should look at getting ur syncho set replaced. sure its a lil pricey but it will feel like u are driving a brand new car.

also if ur interested in upgrades before u look at the ppg gbox there is the option of eg. os giken gearsets. last tiem i looked liek 3k from japan

no, not all PPG boxes are straight cut dog boxes.

you can get helical gears with synchro's if you like. hell, you can even get a mixture of straight cut and helical gears.

the 33 gts-t gearsets are pretty strong, just get the synchro's replaced, and you will more than likely be right.

i've seen one last quite some time with 600hp being thrown at it..

[bubba]

no, not all PPG boxes are straight cut dog boxes.

you can get helical gears with synchro's if you like. hell, you can even get a mixture of straight cut and helical gears.

the 33 gts-t gearsets are pretty strong, just get the synchro's replaced, and you will more than likely be right.

i've seen one last quite some time with 600hp being thrown at it..

+1

[R DIRTY 3]

.

the 33 gts-t gearsets are pretty strong, just get the synchro's replaced, and you will more than likely be right.

i've seen one last quite some time with 600hp being thrown at it..

If its the car im thinking of, it cops an absolute thrashing to

[bubba]

Is that because you can't shift properly?

[mitchy_]

possibly... AWD limiter launches?

[Sneakyazn]

Is that because you can't shift properly?

LOL i can shift properly hahaha... but yea thnx for the info so this "redline shockproof gearoil" where do i gets eeet from? i take it from a performance shop... like... xspeed or somethin?

[mitchy_]

coventrys sell it

get the heavyweight shockproof, as the lightweight isn't designed for syncho-type boxes.

[Sneakyazn]

coventrys sell it

get the heavyweight shockproof, as the lightweight isn't designed for syncho-type boxes.

ok well thnx for ur advice, guess ill do this 4 now an then fix the syncro's when they actually need it... its very faint and only one gear at ridiculas speeds so its not a real issue i just tend to wanna know what i need to know before things get worse.

[bubba]

LOL i can shift properly hahaha... but yea thnx for the info so this "redline shockproof gearoil" where do i gets eeet from? i take it from a performance shop... like... xspeed or somethin?

I was talking to Brad

My box crunches 2nd slightly if I rush it and I was considering some Redline shockproof oil but my mechanic said don't bother/don't waste my money.

Edited January 6, 2009 by bubba

[R DIRTY 3]

I was talking to Brad

My box crunches 2nd slightly if I rush it and I was considering some Redline shockproof oil but my mechanic said don't bother/don't waste my money.

Yeah i knew you were talking to me....but i chose to ignore your comment