Gearbox Oil

P

peen

Lifer
Well I have spent far too long trying to decide what gearbox oil to put in my GT (Non LSD). I know it has to be 75w90 but there are so many companies that sell all their different brands, etc!

The old site had a service schedule which recommended Castrol Syntrax 75w90 which appears to be a universal oil for both API GL3, GL4 and GL5 specifications (whatever that means)! :)

What brand do you guys use? I have read threads that say Redline is good and equally as many threads that say it is bad!

I have also been recommended Silkolene Silktran Syn 5 or Motul MOTYLGEAR which are both rated at GL4 and GL5 and are 75w90.

Money isn't really an issue - I just want the best. But I guess it is going to be down to personal opinion - which is why I am wondering what you people use! Thanks :)
 
Jay

Jay

Admin
My trackcar is running ATF in it at the minute (all I had lying about at the time of building) but Redline will be my first port of call. Heard good reports about them from many sources.
 
P

peen

Lifer
I forgot to add, with regards to the Redline oils, which would be recommended?

75W90 NS - GL-5
MT-90 - GL-4

Both are 75w90 oils so I'm a bit confused although on the Redline web site it says the MT-90 is popular for Toyota's, and I have also read on the Demon Tweeks web site that the MT-90 is the one to use on synchromesh gearboxes (which I believe the GT uses)?

I'm leaning towards the MT-90 at the moment but again any input appreciated. :)
 
sx_turbo

sx_turbo

Lifer
gl-5 is fully synthetic gl-4 is semi synthetic/ mineral.

i used valvoline syn power 75w90 fully synthetic in mine.

to be fair though as long as its 75w90 and a branded oil all will be fine.
 
weeJohn

weeJohn

Lifer
Toyota recommend 75W 90 hypoid semi sinthetic oil.
I have tried other oils and found this the best.
I have not tried Redline or Royal purple so cant compare to that.
Its important to get the right oil or the synchros will wear, or shifting will be harder.
 
P

peen

Lifer
I'm going with the MT-90 as well based on a reply I had from Redline, Japan:

"For Starlet, the manufacturer's standard gear oil is GL-3 75W90 so we would
recommend MT-90. If your gear box is equipped with LSD, then we would
recommend you to use 75W90 which is GL-5."
 
R

ryu

Fresh Recruit
Hello guys.

I know this topic hasn't been used for a while now, but I have a relevant question...

I got for my Glanza V the Texaco Multigear S synthetic gearbox oil.

I don't know much on this this subject, it writes on it:

SAE 75W-90
API: GL-5/GL-4/MT-1, ZF TE-ML-02B/05B/07A/08/12B/1GF/16F/17B
MAN Standard M 3343 Type SL

"Fully synthetic gear oil especially developed to cover Japanese and European OEM's needs for API GL-4 & GL-5."​

I had a hard time locating a 75W-90 oil over here (Cyprus), all I could find was simple 80W-90.

Anyway, the critical question is... will I be ok with this gear oil?

Thanks
 
P

potge

Fresh Recruit
GL4 and GL 5 have mostly to do with protection on some metal parts,synchros etc (probably bronze ones but i cant remember now which exaclty) within the gearbox. GL4 provides better protection over GL5 . So best for our gearboxes is GL4 . Also big brands redline etc are all 100% fully synthetic gl4 or gl5. So as stated before and from Redline MT-90 is the most suitable from redlines oil selection, but any 75-90 gl4 is also suitable
 
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