Stuck Gearbox

[R.3.2.G.T.R]

hi ppl,

my gearbox wont allow me to select any gears while the car is running, but im able to select gears with the car off

how it happened? well i gave it a bit from standing start (around 5000rpm) and was unable to select 2nd straight away, regretable moment but was curious to see how it went when launched, no noticeable noise at the time

i have rung gearbox shop and its $560 odd to do a clutch change should that be problem

i have done a slave cylinder bleed (yet to do it at master) and visually inspected the pedal box which appears fine (will remove on the weekend) and clutch progressively gets hard to pump (if thats a test for air leak at the booster)

from other posts, selector fork could also be the culprit (broken), perhaps clutch failure

will lack of oil cause something like this (i will check oil level in a few days)?

if anyone has had the same issue, pls post what it turned out to be

either way, it appears to be a gearbox out fix, now contemplating a backyard job or workshop job

btw currently have a single plate nismo clutch that was rebuilt by npc a few moons ago, gearbox was in good condition prior to moment of madness and did not crunch when changing

[GTRsean]

I had the push type clutch in my R32 1992, I have broken three gboxes and clutch related hardware too . I had a few clutch disengagement problems over the years due to, (not at the same time)

Broken clutch fork

Stuffed slave cylinder

broken clutch fork pivot point stud.

input shaft housing snout rubbing on os gikken pressure plate (snout needs to be machined if running twin, tripple plate os clutches).

[R.3.2.G.T.R]

with the gearbox in its present condition, would i have damaged the gearbox or its more a case of replacing a stuffed clutch/part and wacking it back in?

[Marlin]

with the gearbox in its present condition, would i have damaged the gearbox or its more a case of replacing a stuffed clutch/part and wacking it back in?

Unlikely to have damaged the box mate. If it's a slave cylinder there's no need to remove the box. Get her up in the air and take a look

[R.3.2.G.T.R]

fingers crossed its something as simple as stuffed slave or even clutch, just as long as gearbox didnt cop it.. will report as soon as i have looked at the master/slave cylinders properly

is it possible to rule out pivot ball / clutch fork from external inspection???

[Marlin]

Clutch fork yes, pivot ball no, well, not always. First step is to see if the slave is moving the fork when someone depresses the clutch.

[R.3.2.G.T.R]

Clutch fork yes, pivot ball no, well, not always. First step is to see if the slave is moving the fork when someone depresses the clutch.

ok bled the slave and master again, can definately see the slave moving the piston, car was still on the road so couldnt see the fork portion

have plans to put it up on stands to get a better look over the weekend

anyone know how high i will need the car off the ground to be able to drop the box and clear underneath the car??

[DVS JEZ]

Put it in gear clutch in then start it and see what happens

[R.3.2.G.T.R]

Put it in gear clutch in then start it and see what happens

car moves forward slightly when started in gear, no difference if i press the clutch or not during this time

pretty much exhausted my options testing for other things, was planning on taking the gb out at home but now will be done at a workshop, looking for a replacement clutch now

[Spurdo]

yeah you probably dont wanna be under one of those suckers by yourself when it comes free

[R.3.2.G.T.R]

all sorted out, clutch replaced and its all good now, old one is f##ked and welded itself

out with the old nismo single plate rebuilt by NPC

in with the new nismo twin plate coppermix goodness

[3BEPKA]

Same thing just happened to me,gear stick is stuck in neutral,can't select any gears, I hope is clutch not gearbox

[R.3.2.G.T.R]

Same thing just happened to me,gear stick is stuck in neutral,can't select any gears, I hope is clutch not gearbox

wish u luck mate, i was dreading damage to gearbox when mine got stock, also do all others bits like bleeding, checking for play in fork etc before removing gearbox