New Clutch Now Have Gearbox Problems

[pytanie]

Hows it going guys, long time lurker decided to make an account..

Just under 2 weeks ago i got a new excedy twin plate pull-type put into my car (93 BNR32) I also got new transmission & transfer case fluid's. I asked my mech to put in redline, but due to the un-availability of it he put in a motul oil. The first night i picked up the car the clutch was quite noisy when cold and got a bit better when warm, i also found that 2nd gear was crunching and so was 4th (4th used to only crunch when driven hard and changed into at over 80). I also found that the car off the line would really struggle to move unless i rode the clutch a bit (1200-1400rpm) ... I rang my mech in search of answers, he told me that it was a new clutch and that once the necessary 500km's are driven to wear it in, it should all level itself out..

Week and a bit has past and i travelled the 500km, last night i took it for a quick spin.... I then decided to give it a quick squirt 1st into 2nd.. i noticed that it was terribly rough and could feel 3 very quick gear box shudders before it took of in 2nd, i tried it again and the same thing happened. I then decided to shift slower and much more deliberately into 2nd and it worked fine...

Today i took it for another drive to the shops, no hard driving.. and noticed on start up the knock went to 18... i've never had knock go over 1 on start up before... It was also a pain in the ass to start moving from stationary and was making all kinds of noises.

So atm just waiting for my mech to open again so i can give him a call..

I have a feeling that somehow the box was not put back in properly or the clutch isn't balanced... pretty new to all this, but i do remember the mech telling me he hadn't done a pull type clutch in quite some time, i have a sneaky suspision that it may have been a rush job.... Car was in the shops for 2 weeks, Majority of that time was waiting for late parts... Most of the work was carried out in 1 day, so i dunno..

Anyone have ideas on what could be wrong and what would be the best way to approach my mech about all this?

merry chrismas

Edited December 26, 2007 by pytanie

[Cubes]

Nothing is wrong with knock hitting 18 on start up.

What motul gearbox oil did he put in? Mineral junk or the full synth Gear 300?

The gear 300 is excellent stuff and will not cause shift problems. The mineral HD motul stuff will.

Motul Gear 300 > Redline anyway.

[pytanie]

Reset says

MOTUL GEAR 75 / 140 COMP GEARBOX

[Cubes]

Motul Gear could be Gear HD the mineral junk.

Gear 300 is the only stuff you want. I've tried the Gear HD and it is Nooooooo good. Bulks on fasts shifts once warm also. :S

[pytanie]

Even with that said thought, Overall it should have been an improvement over what it was like before.

Guess the only thing to do is speak to the mech about it and show him and see what he says and does.

cheers

[Cubes]

Not really.. I went from Valvoline semi-synth stuff to VMX80 with an improvement; then to Gear HD and it was horrid, worse than the very cheap valvoline semi-synth

Motul gear 300 ftw if you want good shift quality or simply run the cheap VMX80.

[pytanie]

Not really.. I went from Valvoline semi-synth stuff to VMX80 with an improvement; then to Gear HD and it was horrid, worse than the very cheap valvoline semi-synth

Motul gear 300 ftw if you want good shift quality or simply run the cheap VMX80.

So what your saying is all my gearbox problems "could" be caused by the fluids im using?

[ali-turko]

that exactly what his saying, cant skimp out on a gtr

[pytanie]

that exactly what his saying, cant skimp out on a gtr

ok fair enough...

Wasn't skimping, i wanted redline but the mech decided to put in something else

cheers

[Bumblebee]

wtf does knock have to do with a clutch?? twin plates are noisy.

ive installed trillions of the bastards and theyve all been noise.. thats how they are.. tripples r even worse and 4 r worse again.

as for ur crunching. definately sounds like wrong oils. 75-140 is way too thick for the box anyway. Factory recommends 80/90 which is what i use and i have no problems @ all..

change ur oils. as for shudders and vibrations before takin off?? wtf does that even mean.. when u accel, petrol goes in motor, explodes, makes engine move connects to flywheel wihch moves clutch hence moves car..

it wont vibrate a few times b4 moving.. its not a horse. you open throttle, it moves, unless theres something wrong with ur tune/engine. gearbox doesnt have anything to do with that.. all it does is transfers energy from engine to wheels.

where abouts are u from? i could give u a hand with it if ur in melb.

[pytanie]

wtf does knock have to do with a clutch?? twin plates are noisy.

ive installed trillions of the bastards and theyve all been noise.. thats how they are.. tripples r even worse and 4 r worse again.

as for ur crunching. definately sounds like wrong oils. 75-140 is way too thick for the box anyway. Factory recommends 80/90 which is what i use and i have no problems @ all..

change ur oils. as for shudders and vibrations before takin off?? wtf does that even mean.. when u accel, petrol goes in motor, explodes, makes engine move connects to flywheel wihch moves clutch hence moves car..

it wont vibrate a few times b4 moving.. its not a horse. you open throttle, it moves, unless theres something wrong with ur tune/engine. gearbox doesnt have anything to do with that.. all it does is transfers energy from engine to wheels.

where abouts are u from? i could give u a hand with it if ur in melb.

I know there meant to be a harsher and noisier then standard..

Im glad it's just oils, thought i may have had something worse on my hands...

Disapointed that the mech put it in there with all the experience he's got with gtr's

Im from queensland mate... cheers

[blind_elk]

it wont vibrate a few times b4 moving.. its not a horse. you open throttle, it moves, unless theres something wrong with ur tune/engine. gearbox doesnt have anything to do with that.. all it does is transfers energy from engine to wheels.

I've noticed HD clutches require a slight change to driving style to get the car moving. I only fitted a HD single plate clutch. Before that, I'm pretty sure I could ease the clutch - no throttle - and the car would start moving. I now find I need to give some revs or the engine will stall.

So, try giving a few more revs before you start to engage the clutch, see if that solves the "shudder".

[godzukid_gtr33]

Not really.. I went from Valvoline semi-synth stuff to VMX80 with an improvement; then to Gear HD and it was horrid, worse than the very cheap valvoline semi-synth

Motul gear 300 ftw if you want good shift quality or simply run the cheap VMX80.

the last week i was the same problem to you men i have a skyline gtr r33 and i chance the oem clucth for to put a hks twin plate, and mi mechany put a oil in mi gear box motul ATF gear box the colors was red, when i was in the drag racing and i was running mi firts race the gear box transmission don't take the 1,2,3,4,5 speed i don;t know what happed, but i need to way like 1 hours for to move the car, later the car don't take the 3 and 4 gear the syncro was damage..!and right now was to need a buy a other transmission gear box here and mi country dominicain republic i have the only one gtr r33 , and i search a others transmission gear box but is for the gtr r32 i have a questions to you is the same a gtr r33..? i know there i need to chance the clutch because the gtr r32 early model is push type and mi car gear box gtr r33 is pull type i only wanna to know if is diferent... and what type of oil there really need to put in mi transmission gear box, right know a chance and i put the oil motul 75w90 gear box, and what type of oil used the DIFFERENTIAL is the same of gear box oil...? or is diferent thanks for all and help me about this problem........

[godzukid_gtr33]

Reset says

MOTUL GEAR 75 / 140 COMP GEARBOX

Hey hi i have a gtr r33 i put in mi gear box a motul 75w90 gear box mechany and in the differential a put this oil too ,is correct oil for both parts thanks i living in dominicain republic you know here is too much warn , thanks for all....

[godzukid_gtr33]

Motul Gear could be Gear HD the mineral junk.

Gear 300 is the only stuff you want. I've tried the Gear HD and it is Nooooooo good. Bulks on fasts shifts once warm also. :S

Hey hi i have a gtr r33 i put in mi gear box a motul 75w90 gear box mechany and in the differential a put this oil too ,is correct oil for both parts thanks i living in dominicain republic you know here is too much warn , thanks for all....