Is This a Suitable Transmission oil?
#1
Is This a Suitable Transmission oil?
Been looking for some GL4 gear oil for the R151F in my 4x4 Pickup. Found this at the autozone, claims to be Gl-4
Just curious what the forum's opinion is on this one.
Just curious what the forum's opinion is on this one.
#2
Registered User
Gear oils that meet GL-5 standard are often said to be GL-4 compliant, as this oil says on the label.
Using this gear oil might not harm your tranny, but it is probably not the best choice.
GL-5 spec oils are often found to be too 'slippery' to permit old, worn syncros to function to the best of their ability.
Sta-Lube, Red Line, and others still sell straight GL-4 gear oils.
Where I live, here in the west, I can get 5 gallon pails of Arizona/Colorado Petroleum straight GL-4 gear oil, and that's what I use in my syncromesh trannys.
GL-5 oils are certainly better than GL-4 oils in hypoid gear differentials though, where there is more sliding gear friction than there is in transmissions.
Using this gear oil might not harm your tranny, but it is probably not the best choice.
GL-5 spec oils are often found to be too 'slippery' to permit old, worn syncros to function to the best of their ability.
Sta-Lube, Red Line, and others still sell straight GL-4 gear oils.
Where I live, here in the west, I can get 5 gallon pails of Arizona/Colorado Petroleum straight GL-4 gear oil, and that's what I use in my syncromesh trannys.
GL-5 oils are certainly better than GL-4 oils in hypoid gear differentials though, where there is more sliding gear friction than there is in transmissions.
Last edited by millball; 04-11-2023 at 10:24 AM.
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86TurboYota04 (04-11-2023),
JoeS (04-11-2023)
#3
Registered User
I'd use the GL rating and weight as specified by Toyota. Then there is no issues nor any need to try to improve Toyota specs. Changing the lube oil on schedule is the key and Valvoline makes a good oil. I change lube oil every 100K miles on my 86 2WD (482K miles) 5-speed and differential. Still original that shifts great with no issues nor leaks.
Last edited by JoeS; 04-11-2023 at 10:38 AM.
The following users liked this post:
86TurboYota04 (04-11-2023)
#4
Gear oils that meet GL-5 standard are often said to be GL-4 compliant, as this oil says on the label.
Using this gear oil might not harm your tranny, but it is probably not the best choice.
GL-5 spec oils are often found to be too 'slippery' to permit old, worn syncros to function to the best of their ability.
Sta-Lube, Red Line, and others still sell straight GL-4 gear oils.
Where I live, here in the west, I can get 5 gallon pails of Arizona/Colorado Petroleum straight GL-4 gear oil, and that's what I use in my syncromesh trannys.
GL-5 oils are certainly better than GL-4 oils in hypoid gear differentials though, where there is more sliding gear friction than there is in transmissions.
Using this gear oil might not harm your tranny, but it is probably not the best choice.
GL-5 spec oils are often found to be too 'slippery' to permit old, worn syncros to function to the best of their ability.
Sta-Lube, Red Line, and others still sell straight GL-4 gear oils.
Where I live, here in the west, I can get 5 gallon pails of Arizona/Colorado Petroleum straight GL-4 gear oil, and that's what I use in my syncromesh trannys.
GL-5 oils are certainly better than GL-4 oils in hypoid gear differentials though, where there is more sliding gear friction than there is in transmissions.
Where do you get your oil from? I live in southern AZ.
#5
Registered User
Arizona Petroleum Company
1015 S Cherry Ave, Tucson, AZ 85719Rugged 75W-90 EURO >> Straight GL-4 spec gear oil.
Last edited by millball; 04-11-2023 at 12:23 PM.
#6
Registered User
GL-4 only. A higher number isn't better for your tranny (because of synchros). Redline is nice stuff, but basic dino oil is likely just fine as well. Me? It's so rare I'll change it that I'm a Redline kinda guy.
The following users liked this post:
JoeS (04-13-2023)
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