supposedly the larger/increased synchros would probably be using non soft/yellow metals (brass, copper etc) so using GL5/6 gear oils with higher EP additives etc would not have increased corrosion effect?
considering the synchro/GL4 requirements and very thin viscosity, would you consider the supposedly better (although the added EP additives may be a double edge sword against the soft/yellow metals as mentioned) GL5/6 higher performance/full synthetic gear oils?
currently i have this gathered/summarized:
-
AMSOIL lowest also 90
- same for
chemlube full ester based synthetics
- same goes for
eneos GL5 synchromesh compatible gear oil
-
royal purple max gear lighest is 90, and this is a bit interesting:
http://www.royalpurpleconsumer.com/wp-cont..._Synchromax.pdfxw40 similar to ATF specifications
Interesting on the French' gearboxes/lubes
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Total:
http://www.lubadmin.com/upload/produit/fic...lang_1/1205.pdfnot much info on this, total website is so shit i rage browsing it.
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ELF: ah reminds me of the proton default lubricant (are they still using it?) - TRANSELF NFJ 75W-80
http://www.totaloil.com.au/Pages/content/NT0000C9DA.pdfhttp://www.totaloil.com.au/Pages/content/NT0000E0F2.pdfhttp://www.totaloil.com.au/Pages/australia...=EN&$#E3B6really bad site design:
http://www.new-elf.com/summary of suitable Gear oil for the F5MBB Aisin 5 speed manual Transmission:
| Brand | Model Name | base stocks/remarks |
| Redline | MTL | Fully synthetic |
| Motul | MOTYLGEAR 75W-80 | semi-synthetic |
| Liqui moly | Getriebeöl (GL5) 75 W-80 | semi-synthetic |
| ELF | TRANSELF NFJ 75W-80 | synthetic technology (no info on base stocks) |
| Mitsubishi | Diaqueen 75w80 GL-3 | no info on this at all besides this is the original manufacturer's specified lube |
| Pennzoil | SYNCHROMESH FLUID | Should be mineral based, however using synthetic technology. may google "paraffinic base stocks" |
| Torco | MTF | Group 3 Mineral based, VI is on the low side though. |
references:
Redlinehttp://www.redlineoil.com/content/files/te...duct%20Data.pdfhttp://www.redlineoil.com/content/files/te...MSDS%203-13.pdfhttp://www.redlineoil.com/content/files/te...Tech%20Info.pdfMotulhttp://www.motul.com/system/product_descri....pdf?1328624012Liqui Molyhttp://www.liqui-moly.de/liquimoly/produkt...voiladb=web.nsfPennzoilhttp://www.pennzoil.com/wp-content/uploads...Trans-Fluid.pdfTorcohttp://www.torcousa.com/technology/MTF.pdfany comments on the above gathered finding/data?
on the additive end, i've had very positive results for the lubegard platinum for atf, and quite similarly for the manual gear supplement. though i'm not too sure if the lube/additives may potentially further worsen the situation i am facing (doesn't seem like it, noise levels same, still very intermittent and din't seem to have increased rate of occurrence.
although yes, i do agree that if i have the money i am probably would be better off going for full synthetics with better base stocks and additive package to have much more consistent performance

i think i may just go for that on my next ATF change

(thinking Torco ATF)
thanks for the info btw, i'll try to pay attention to the whine and purposely disengage the clutch the moment it appears and see if it disappears. if it does, i guess we can confirm it's the input shaft?
If it is the input shaft, there is nothing (eg: change thicker/EP/shock proof lubes) we can do besides changing the entire gearbox? (i doubt proton will repair, most likely replace 1 to 1
still really new on manual trannies so bear with me a bit: does the gear oil lubricates either of the input/output shafts?
good info on the 300v, really eager to give it a try lol...
for a bit i was thinking, as i already spent so much for additives (liqui moly ceratec, that nano extreme ws2 thingy), i actually spent more than what SR5r/300v would have cost... like, those would be better than amsoil signature series i'd reckon LOL!
well regardless of the job's interest, money is money. and money helps fund car modding/maintenance

Well it is up to you to figure if the increased corrosion is worth the better drive. To me at least, baulk rings were cheaper than gear sets so going for GL-6 type spec was a no brainer. But mind you I supervise a team of experienced diesel fitters, mechanics and automotive machinists, so labour is on the cheap side if you buy them a slab of piss
I generally don't want to experiment too much these days and thus go for a "fit for purpose" oil and then assess it from there, but don't let that stop you from experimenting though.
Generally if you engage the clutch while moving, your input shaft will receive no power, thus you can generally figure out if it is an input or output issue. If the input shaft is the issue the first things I'd look at are;
You can get to most of these when you replace the clutch. The lubrication for spline the input shaft is usually moly grease that is applied during tranny assembly where the clutch meets the spline. Also a bad alignment of the clutch can cause such issues as well.