Gearbox oil FAQ

J

Jimbo_driver

Fresh Recruit
Hi, I would need some help too. I recently bought a tercel with a 4efte and a toyota lsd transmission in it(same transmission as a starlet gt). I want to do a little tune up onn it but i dont know what kind of specific oil goes in that transmission and no one seems to be able to help me where i live. I only know that transmission with lsd diff needs a different oil tan a trans with regular diff. Can someone help me here please? would really appreciate.
 
O

oilman

Trader
Jimbo_driver said:
Hi, I would need some help too. I recently bought a tercel with a 4efte and a toyota lsd transmission in it(same transmission as a starlet gt). I want to do a little tune up onn it but i dont know what kind of specific oil goes in that transmission and no one seems to be able to help me where i live. I only know that transmission with lsd diff needs a different oil tan a trans with regular diff. Can someone help me here please? would really appreciate.
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What you need is a 75w-90 GL 4/5 oil. A Silkolene Syn5, Motul Gear 300 and Millers CRX 75w-90 are good choices

http://www.opieoils.co.uk/c-673-75w-90.aspx
 
J

Jimbo_driver

Fresh Recruit
thank you.

thanks the info will be useful i will look at that carfully. Oh and i looked at the linke and its written in the link that motul gear 300 is made for non lsd diffs. the 2 best i found are millers crx and redline gear 75w90 GL5
 
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J

Jimbo_driver

Fresh Recruit
I checked mi things carefully a im afraid i'll have to do a complete oil flush of my transmission. Does somebody know how many liters of oil i'll need to fill the transmission full?
 
O

oilman

Trader
The Motul Gear 300 wasn't designed for use in an actual seperate LSD, but it's ok in an LSD gearbox.

I think you need about 2 litres, I don't have an definite figure though.

Cheers

Tim
 
O

oilman

Trader
I'm not a big fan of RP oils, there are better oils that aren't over priced like RP is over here (Just looked at a quart of their gear oil and it was £30 delivered). It's not bad, just overhyped and over marketed. You can get something just as good for half the price
 
spuddy

spuddy

Ulster Area Rep.
I just recently put Millars 75w90 fully synthetic for syncromesh gearboxes into my gearbox.

Expensive but it feels quite nice even when cold.
 
TomS

TomS

Lifer
I have recently fitted a gearbox with a mechanical lsd unsure of make cusco kazz or trd. The diff works well however when turning at slow speeds it makes a clunking noise, I was told to do drive in a figure of 8 for 30 minitues to allow it to bed in. I did this and it hasn't made any difference.

I'm using 75w 90 fully synthetic oil at the moment

Is there a running in oil for lsds? would you recommend using small amount of friction modifier 6-10% mixwd with the gear oil?
 
O

oilman

Trader
It could well be just the way the diff is, they aren't really designed for slow speeds. You could try the Redline Friction Modifier and see what happens
 
R

RGM1800

Member +
oilman said:
Hi

Don't go for the Castrol one, a straight 90 is no good for that gearbox. I had a look on that site and understood very little, but I think you'd be best off looking at a GL4/5 rather than just a GL5, I think the Shell Spirax is a GL4/5.

http://tokooli.com/index.php?main_page=index&cPath=9&zenid=b48c61c7dafc8915b62e2d630f7acafb

Cheers

Tim
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thanks man. why is it bad for the tranny running straight ? how about mobilube 80w-90?
http://tokooli.com/index.php?main_page=product_info&cPath=9_14&products_id=49
is it ok to use?
 
O

oilman

Trader
Straight 90s are generally a diff oil rather than a gear oil, ideally you want one that is a gear oil and diff oil. 80w-90, or even better 75w-90 is what you want to go for. That Mobilube should be fine.
 
R

RGM1800

Member +
oilman said:
Straight 90s are generally a diff oil rather than a gear oil, ideally you want one that is a gear oil and diff oil. 80w-90, or even better 75w-90 is what you want to go for. That Mobilube should be fine.
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thanks man. we have small resources of good and high quality gear oils.the mobilube is api gl5 also not gl4/5. any feedbacks on shell spirax?
 
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