R34 Gearbox Troubles

[Jsikalias]

hey all,

i have a problem when im driving and i change 3rd to 4th gearr fast the gears crunch :S and also the clutch is sliping in 3rd would it be a worn clutch? and the gears do not crunch on idle....? thanks

[Jsikalias]

and it doesnt do it while im down gearing :S i hope its not a syncro? and also when im changine quike if i change slow it doesnt crunch.... arghhhhhhhhhhhhhhhhhhhhh

Edited October 17, 2006 by Jsikalias

[Jsikalias]

heeeeeeeeeeeeeeeeeeeelp lol........ im freaking out....

[ebola]

i change 3rd to 4th gearr fast the gears crunch

Does it happent when you change up at a reasonable pace? it could be the synchros (but it shouldn' be)... depends on what you call 'fast'

but before pointing at the synchros, first get your cluth seen to...

it its slipping... its probably worn. and when you get your clutch replaced, it will (should) include the pressure plate.

Although I don't understand 'only slipping in 3rd'... but if the clutch is consistently slipping, fix it.

I think 2nd and 3rd have double synchros, 4th and 5th dont, but the 4-5 change is a smaller ratio. It could be the clutch isn't completley disengaging - but even with the clutch disengaged, the synchros still need time to spin everything up to speed.

After all that armchair diagnosis, I warn you that I am mereley an computer geek with just enough knowledge to be dangerous.

just take it easy on the 3-4 (and 4-5 I'd guess, if you could get it fast enough) changes, and get your clutch seen to when you can. the clutch _may_ be causing the secondary issues (not completley engaging / disengaging).

there should be no need to go from 3-4 fast - I can pull onto the freeway in 2nd (100), and 3rd goes to 150. Take it easy with your car - and what exactly is it? GT-T or GTR?

[Jsikalias]

its a gtt and it only happens when i punch the accelerater and change gears reasnobly fast at around 3-4rpm and also it slips in 2nd sumtime or 3rd but when im in 3rd and im just creeping to 80 in 3rd it doesnt do it but it kind of clicks into 4th gear.? oooohhhh and also wat i mean by fast is when im at a highspeed like above 80 i have to hold the cluthch in for abit longer so it doesnt crunch?

Edited October 18, 2006 by Jsikalias

[Jsikalias]

where is a good place in melbourne for this to get checked out any one have suggestions please?

[Jsikalias]

any other suggestions?? i also noticed tonight that all my other gears are abit harder to slip into gears i have a feeling it might be the clutch but the only thing that amazes me is why does it crunch in 4th

Edited October 18, 2006 by Jsikalias

[ebola]

clutch or synchros - you want more than that, take it to a mechanic.

and if the clutch _is_ having issues - fix that first. Then come back if there are still issues.

test the clutch. pull onto the freeway in 2nd, give it heaps. make sure you DON'T lose traction... if your clutch will slip, you should feel it.

thats about all I can help with - find a mate who knows cars and take them for a spin, or just go to the mechanic...

There could be many reasons for the crunch, as long as the clutch is suspect, there is no point speculating.

--> bye

[Jsikalias]

i got the problem checked out at dandy gearbox n clutch specialist today they found out that my 4th gear synchro is on its way out and the clutch still has abit of bite in it which they say, just letting everyone know that i got quoted $1800 including an excedy clutch, and a 4th gear rebuilt farking expensive shit..... the clutch alone costs $1100 and the 4th gear rebuilt including stripping the box apart and putting new oil in $700 and they give me a warranty on the 4th gear but not the clutch.

[Abo Bob]

Get a second opinion.

[Jsikalias]

i think i will tomoz