ae101 e58 lsd gearbox oil

[sergei]

and the fella who recommended it is 60 years old and races 4agze for god nos how long has 4 of them and he is steven from Glen Eden mechanical he rebuilds the gearboxes too! he says synthtic will polish your syncros and eventually ruin them and redline stuff is too thick as well.
and atf is the go!

Yeah good stuff. Only problem his "theory" is flawed, and he is confusing certain hypoid oils with synthetic that are designed for synchros.

You know some hondas run engine oil (10W30) in their manual transmissions, but it does not mean you should run it in your Toyota.

Why did you ask a question if you have already made up your mind?

[tsoob]

wow i feel like this thread was a waste of time.

[iOnic]

To be fair......when I got my MR2 it had been running ATF in the gearbox (E series, viscous LSD) for an unknown amount of kms (long enough for it to smell burnt anyway). It shifted perfectly and I could never fault it. Only changed because it was past it's use by date and I wanted to try Redline (which I can't fault either).

Toyota recommends ATF for NA SW20 manual gearboxes. But they aren't E series, or LSD.

[mega4a]

.

[allencr]

The synthetics seem to be too slippery for syncros to do their friction bit and live a long life, and the 'thicker is better' attitude definitely doesn't help their life. That syncro has to grab & turn not only the selected gear & clutch disk to the driveshaft/road speed, it has to turn ALL those other gears at the same time too.

It's gears but not Hypoid so it doesn't need any Hypoid type lube.
It's gears and doesn't need any of the additives for blowby smegma & all the other stuff that's in engine type lube.
So it's gear lube or ATF, both recommended by all manufacturers for all their transmissions that are all the same basic design & materials for bearings, gears, seals, syncronizers that need friction or clutchs shedding material.

[sergei]

The synthetics seem to be too slippery for syncros to do their friction bit and live a long life, and the 'thicker is better' attitude definitely doesn't help their life. That syncro has to grab & turn not only the selected gear & clutch disk to the driveshaft/road speed, it has to turn ALL those other gears at the same time too.

It's gears but not Hypoid so it doesn't need any Hypoid type lube.
It's gears and doesn't need any of the additives for blowby smegma & all the other stuff that's in engine type lube.
So it's gear lube or ATF, both recommended by all manufacturers for all their transmissions that are all the same basic design & materials for bearings, gears, seals, syncronizers that need friction or clutchs shedding material.

Please tell me if the synthetic oil is bad for synchroes, why then Toyota recommends GL5 oil (which usually comes as synthetic) for their E series GT4 gearboxes? If the oil was a problem, then obviously there would be a massive problem with synchroes on those vehicles?

Castrol Syntrax 75W-90
Full synthetic SAE 75W/90, API GL5. manual transmission, transaxle and rear axle lubricant with outstanding extreme pressure, synchroniser and high temperature performance. For vehicles that combine gearbox and hypoid diffs, rear axles of light cars and secondary drive axles of 4WD vehicles.

from here http://www.castrol.com/castrol/multipleproductsection.do?categoryId=8000016&contentId=7000384

PRODUCT APPLICATION

Manual transaxles, manual transmissions where API GL4 or 5 is recommended, eg
Subaru, Porsche, Alfa Romeo, various VW and Audi models
Car and light commercial differential for competition applications and reduced viscous
drag.
Most competition transmissions and transaxles, NOT recommended for 6 speed
Hollinger transmission in V8 Super-Car
Jaguar XJ 220 transaxle, Sportscar, Formula Ford + VEE Transaxles
Selected MB, MAN, ZF, DAF, Eaton and Scania applications

PRODUCT FEATURES & BENEFITS

Continued lubrication effectiveness over a broad range of operating temperatures.
A special formulation for a range of European truck driveline applications
Outstanding Extreme Pressure gear oil synchronizer performance
May be used throughout the entire temperature range normally specified to SAE 75W-80,
SAE 80W-90 and SAE 90
Superior thermal and oxidation stability

http://www.tds.castrol.com.au/pdf/10082_Syntrax%2075W-90.pdf

TYPEOFUSE
Specially designed for FF (Front-engine/Front-drive) type transmission with mechanical LSD (Limited
Slip Differential) system.
Suitable for all transmission (synchronized or non-synchronized), 6-speed transmission, gearbox with
differential, transfer gearbox and hypoid differentials with or without LSD.
All types of cars: Circuit, Group A, Rally, Gymkhana, Tuned, 4WD,.....

from here:
http://www.motul.com/system/product_des ... _75W90_(GB).pdf?1339467706

Smooth shift feel for the life of the oil
Enhanced oxidation stability, reducing harmful deposits
Improved load carrying capacity
Contains synthetic base oils for longer life
Will not harm brass or bronze
Compatible with synchro materials
Very fast flow at start up for slick gear shifts

from here:
http://www.penriteoil.com.au/products/manual-gear-&-differential-oils/pro_gear_70w-75_full_syn

[Allister S]

I used to run Mobil 1 SHC (full synthetic) for 6 years in my AE92 E series box - lasted really well until I ran a long very hot test day at Hampton Downs. Basically cooked the gearbox with heat (dead bearings).

I'm now trying Motul Gear300 in a standard E58 with a temp gauge - at the track with lots of lapping the gearbox temps still climb up steadily! Now fitting a gearbox cooler to sort it out (aka GT4 gearboxs have cooler as standard!) and the viscous diff might work better too!

Shifts nicely with the Gear300 oil and much cheaper than the FF which is more for plate LSD's I understand(?)

[TRD_ZERO]

I used to run Mobil 1 SHC (full synthetic) for 6 years in my AE92 E series box - lasted really well until I ran a long very hot test day at Hampton Downs. Basically cooked the gearbox with heat (dead bearings).

I'm now trying Motul Gear300 in a standard E58 with a temp gauge - at the track with lots of lapping the gearbox temps still climb up steadily! Now fitting a gearbox cooler to sort it out (aka GT4 gearboxs have cooler as standard!) and the viscous diff might work better too!

Shifts nicely with the Gear300 oil and much cheaper than the FF which is more for plate LSD's I understand(?)

How are you going to pump the oil through the cooler? Does the gearbox act like a pump pushing the oil through that factory fitted loop/line on the gearbox?

[85AW20v]

There's a small pump inside the gearbox. That loop on the outside is for the cooler connections.

[TRD_ZERO]

Nice! I might Jimmy one up at some stage since I can.

[dnalunchie]

which of the trueno an levins came with LSD?

I was under the impression

All GTZ models had one.

And other than that only the BRZ 6 speed but not the other cars that had the blacktop and 6 speed such as corolla and carib.


Other than that all others have open diff including FXGT etc?

[~SlideWays~]

which of the trueno an levins came with LSD?

I was under the impression

All GTZ models had one.

And other than that only the BRZ 6 speed but not the other cars that had the blacktop and 6 speed such as corolla and carib.


Other than that all others have open diff including FXGT etc?

Only AE101 GTZ's had viscous LSD in E58.
AE92 LSD was an option and gboxs varied from E51, 52 and 58 from what I've seen.

[dnalunchie]

what about the AE111 generation?

[TRD_ZERO]

what about the AE111 generation?

The prefacelift superstrut ae111s came with I think it was torsen lsds. You can tell by the build plate c56xxc and the open diffs are c56xxa.

[~SlideWays~]

what about the AE111 generation?

I was referring to your comment where you said 'all GTZ have LSD' so didn't comment on ae111's.