Brand New R33 Gts-T Gearbox - Crunch Into 4Th?

[turboedsloth]

another thought is that the shifter is a little offset from the normal SR box position and more forward, we customized the shifter to get it into a better position and it could be as simple as me needing to change gears better and when i try to change quickly between 3rd and 4th i am slightly off causing the crunch.

What do you mean by customised??

And i'm with birds on the oil thing, redline is a waste of money. I only run 75-90 in mine and never have problems

[Birds]

Redline is a great product when you have a hard lifed gearbox with buggered synchros that you want an extra 15-20k of smooth driving out of. Used in a healthy gearbox, it's a waste of money.

[boxheadmr]

ahh well i picked some up cheap so might as well try it out, more worried about anything coming out.

customized = bent to position shiftier closer to driver

[GoHard]

How does the stick feel?

With the car off, try 3rd to 4th a few times and see if it catches.

I say this because 2 threads down the list is this: http://www.skylinesaustralia.com/forums/topic/402989-is-this-normal-shifter-movement/

Looks like stick alignment can have an impact on crunching.

[boxheadmr]

thanks Sam, sounds more likely now. will give it a try on the weekend hopefully

[ssxRicho]

Mine is a reco box (previous owner spent $1800). Never saw a track day while he had it with stock power.

Crunches 4th like the stocker boxes ive had previously. Sometimes even on light load on the way back from a track day. Same as the stockers.

He was using mineral, after some crunching I changed it too redline. Didn't make it go away, but its noticabley better. The stocker boxes used motul.

I just put it down to a combination of shift style and loading...

[boxheadmr]

i dropped the oil today and used a chux cloth to filter out any potential filings, i did pick up a bit of sludge of very fine particle's over the sump plug and after using my chux draining system switched to a pot filter from bunnings and ran the oil again through this to pick up anything else.

I have put some full res photos up here as you kind of need to see the fine particle's to understand what i am saying.

http://200sxweb.blogspot.com.au/2012/07/gearbox-crunching-4th_08.html

[Birds]

Particles are likely shavings from the new bearings in a new gearbox. You need to change the oil after 1000km of running in a new or reconditioned gearbox because of this, or they end up doing nasty things to the oil and consequently the box - another reason Redline is a waste.

Put a reco gearbox in my R33 GTS-T last week, running $20 of 75w90 mineral oil, not a crunch in sight

Do have to remember that these were built to a certain specification as street vehicles for driving on the street - once you start modifying the vehicles or driving them in any manner that isn't daily driving, expect crunches and noises to start happening...

[boxheadmr]

quick update, visited wakefield on Thursday and managed 40laps doing mid 4's and 5's with no crunching.

Took it a little easier on the change from 3rd to 4th but all seemed ok and didn't miss a beat,