Posted 10 August 2015 - 09:58 AM
Posted 10 August 2015 - 10:30 AM
Nulon gearbox oil + PTFE additive and the noise is gone and feels 1000x better on shifting. can still be tricky using reverse occasionally but hard shifting is no longer an issue.
Posted 10 August 2015 - 10:30 AM
If it's still notchy then call the box shop that rebuilt it because no sr boxes shift very smooth all the time.
Posted 10 August 2015 - 01:47 PM
I was having similar issues and my slave was seeping so I had to replace anyway. I bled mine from under the car but I found the only way to get all the air out of the master was to jack the front of the car slightly and a quick bleed from the master nipple as well.
I was told never do this. I still don't know why? Was the one thing that made the biggest difference to my overall shift quality but particularly between 1st and 2nd.
Posted 10 August 2015 - 04:58 PM
Posted 10 August 2015 - 09:02 PM
Never had the issue until MT90 went in
Posted 10 August 2015 - 09:12 PM
Posted 10 August 2015 - 09:20 PM
Even Nulon with the n70 additive is much better than Redline. I'm sure Redline is good for something, just not sure what.
Just make sure you're dealing with the root cause instead of just trying to compensate for it. In my case: slave>fluid>bleed from the lower nipple>bleed from master. Fixed.
Posted 10 August 2015 - 09:58 PM
Going to go try Castrol VMX I think, probably closest to OEM
Posted 11 August 2015 - 09:32 AM
Different gearbox oil did make slight differences but never fixed the issue, Motul being the best, Redline being the worst and Nulon with n70 being very close to Motul.
When cold was a notchy, crunchy bitch particularly between 1st and 2nd and sometimes trying to get reverse, which improved dramatically when warm or if the ambient temp was high.
Bleeding the master (and changing slave) was a revelation in gearbox operation, but only after jacking the front of the car for a while to allow any air to flow to that end of the master.
Posted 11 August 2015 - 01:28 PM
Posted 11 August 2015 - 08:29 PM
I was using LWSP for a few years and read about people having problems, I've had lots of gearbox problems but I can't be sure if they are related or not.
The most suspicious case was an RB25 box, only ran on LWSP for as long as I've known (old owner plus me) and the brass synchros wore out before anything else at all. Whole box was neat, synchros were ruined.
I then switched to MT90 and it's been OK, the last lot I had in my current box (Z32) came out a dark grey colour, it seemed like it had been burnt. It had been in the car for a tarmac rally and 3 drift events though, plus about 20,000km or so of street driving - far too long to leave it in there.
Having said that, I'm tempted to try Castrol again, I agree with someone saying the VMX or would be close to OEM or similar to it.
It's a pity there's no objective arguments out there, or conclusive testing... For me at least, I stay away from GL-5 spec. oils as Nissan use/recommend a GL-4 from factory. That knocks out a lot of the modern oils from Supercheap Auto etc like the synthetic Nulon and Penrite (although I am a big fan of Nulon, I haven't tried the 'smooth shift' synthetic gear oil because it is GL-5, as it their gearbox additive).
Keen to hear more thoughts on this!
Posted 12 August 2015 - 11:41 AM
Then again, an old, worn out box will usually feel the same 3 years on. Not that I'd know from experience...
Anyway, you might be on to something there sweefu...
Wikipedia reckons this
Reading some other sites, seems that the GL-5 additives will prolong life of gears and shafts but will wear out synchros.
Edited by Skepticism, 12 August 2015 - 11:46 AM.
Posted 14 August 2015 - 10:11 PM
Would try the 75W-85 synthetic GL4 next time.
If somebody made a 65W-90 GL4 oil I recon that would be the perfect oil. Thin enough when cold not to baulk, and thick enough when hot not to crunch.
Posted 16 August 2015 - 05:44 AM
Posted 17 August 2015 - 01:43 PM
Being notchy on cold is pretty normal with the blue goop but when warmed up it's fine.
Just my 2 cents
Posted 09 December 2016 - 07:42 PM
i have a z32 in my 180sx wouldn't shift into 1st directly at a stop. had to go into other gear then back into 1st. also 5th on the freeway was crunching 3-4times out of ten times. then i was told about mbl8 an aussie sold product that i am now a distributor for. my gearbox feels very much like new. also fixed my mates gq patrol box and made his missus xr5 shift much smoother. oil doesnt matter just use this stuff pm me if your keen its cheap and works 100%. been on here for years so not a scammer just found something that works want to pass it along. cheers
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