Rear diff and Transfer oil
May 19, 2005 | 09:10 AM
#17
Evolving Member
Joined: Jun 2001
Posts: 320
Likes: 0
From: boonies
Originally Posted by Precision Dyno
Nothing is better based on testing that we've done than AMSOIL. 75w-90 and higher for your rear diff and trans is the best on the market.
We run AMSOIL in ALL our cars and have seen increases in gas mileage, a quieter tranny and diff and unmatched lubrication. Whats nice about AMSOIL is that it soaks into the metal creating a shield of oil protection that never leaves the exposed surface.
If you want I can post up some testing that was done at a third party testing facility to show the difference in the various oils based on ball wear test, viscosity ect ect.
We run AMSOIL in ALL our cars and have seen increases in gas mileage, a quieter tranny and diff and unmatched lubrication. Whats nice about AMSOIL is that it soaks into the metal creating a shield of oil protection that never leaves the exposed surface.
If you want I can post up some testing that was done at a third party testing facility to show the difference in the various oils based on ball wear test, viscosity ect ect.
Jun 2, 2005 | 11:21 AM
#20
Originally Posted by Precision Dyno
Nothing is better based on testing that we've done than AMSOIL. 75w-90 and higher for your rear diff and trans is the best on the market.
We run AMSOIL in ALL our cars and have seen increases in gas mileage, a quieter tranny and diff and unmatched lubrication. Whats nice about AMSOIL is that it soaks into the metal creating a shield of oil protection that never leaves the exposed surface.
If you want I can post up some testing that was done at a third party testing facility to show the difference in the various oils based on ball wear test, viscosity ect ect.
We run AMSOIL in ALL our cars and have seen increases in gas mileage, a quieter tranny and diff and unmatched lubrication. Whats nice about AMSOIL is that it soaks into the metal creating a shield of oil protection that never leaves the exposed surface.
If you want I can post up some testing that was done at a third party testing facility to show the difference in the various oils based on ball wear test, viscosity ect ect.
I assume this was the (MTG) 75w90 GL-4. also what about the (AGL) 80w90 GL-5 for the t-case and diff?
Jun 3, 2005 | 09:12 AM
#21
Originally Posted by EVOag
search it works...
bg synchro for tranny
and oem lsd gear oil for TC and rear diff...
bg synchro for tranny
and oem lsd gear oil for TC and rear diff...
I found that the first 2 trannies I used in my DSM went within 10k miles while the last one lasted over a year and 30k miles using factory recomended fluid.
Jun 3, 2005 | 10:13 AM
#22
From this thread:
https://www.evolutionm.net/forums/sh...esh+equivalent
https://www.evolutionm.net/forums/sh...esh+equivalent
Originally Posted by GEARS
The 5 speed transmissions in the EVO 4-8 tend to shift best with a GL-4 gear oil that meets specification for synchromesh. Like several have stated here and there on this forum, do not use a GL-5 in the transmission. I would avoid using any gear oil that claims to be GL-3, 4 & 5 spec. Instead, option only for a GL-4 oil that meets.....specification for synchromesh. These oils will improve the effectiveness of the synchronizers and that means a better shifting transmission.
GL-5 oils should not be used in the Mitsubishi transmission because they are too slippery and reduce the effectiveness of the synchronizer and you don't want that because the synchros basically act like brakes, their job is to bring the speed of the various transmission components up to the same “synchronized” speed with one another so the engagement teeth mesh at the same speed and don't get all torn up.
When it comes to the 6 speed Mitsubishi specifies the Diaqueen Super Multi Gear Oil, part #MZ313376. Could you use a different oil in thd 6 speed transmission? Most likely you could but consider this, Mitsubishi rarely uses the phase "exact equivalent" and when they state to use the Diaqueen SMGO or the "exact equivalent" it's probably best to follow their advice.
In the transfer case and rear differential you must use a GL-5 "Hypoid" type gear oil. The transfer case features hypoid gears to transmit that power to the drive shaft. The word hypoid is short for hyperboloid which refers to the design of these gears. All you need to know is that hypoid gears; don’t share a common axis, run quiet (for the most part) and they are a strong design. Yet by design the gear teeth must slide across one another during their meshing and this is why you must us a GL-5 Hypoid type gear oil in the transfer case and rear end, you need that slippery oil here. Use the wrong oil and the transfer case will start howling and growling within a couple tanks of gas. Mitsubishi specifies the Diaqueen LSD Gear Oil in the transfer case and rear end of the EVOs. This oil is a single viscosity, 90 weight, and the part number is #377610. If you can’t find this oil you must find a gear oil that meets the GL-5 Hypoid specification. Again this oil must ONLY meet GL-5 preferably 90 weight. Do not use a gear oil that claims to be GL-3, 4 & 5. These one size fits all type oils are not recommended anymore than a one heat range fits all spark plug.
Also, multi viscosity index modifiers and dyes both reduce the film strength of the oil; they take up valuable parking spaces on the molecular level and that’s what the transfer case and rear end both need more of, film strength. There are several brands of oil on the market and you can use any of them as long as it meets Mitsubishi's requirements.
Change the transfer case oil everytime you change the engine oil and you'll have a happy T-case.
Jon@teamrip.com
GL-5 oils should not be used in the Mitsubishi transmission because they are too slippery and reduce the effectiveness of the synchronizer and you don't want that because the synchros basically act like brakes, their job is to bring the speed of the various transmission components up to the same “synchronized” speed with one another so the engagement teeth mesh at the same speed and don't get all torn up.
When it comes to the 6 speed Mitsubishi specifies the Diaqueen Super Multi Gear Oil, part #MZ313376. Could you use a different oil in thd 6 speed transmission? Most likely you could but consider this, Mitsubishi rarely uses the phase "exact equivalent" and when they state to use the Diaqueen SMGO or the "exact equivalent" it's probably best to follow their advice.
In the transfer case and rear differential you must use a GL-5 "Hypoid" type gear oil. The transfer case features hypoid gears to transmit that power to the drive shaft. The word hypoid is short for hyperboloid which refers to the design of these gears. All you need to know is that hypoid gears; don’t share a common axis, run quiet (for the most part) and they are a strong design. Yet by design the gear teeth must slide across one another during their meshing and this is why you must us a GL-5 Hypoid type gear oil in the transfer case and rear end, you need that slippery oil here. Use the wrong oil and the transfer case will start howling and growling within a couple tanks of gas. Mitsubishi specifies the Diaqueen LSD Gear Oil in the transfer case and rear end of the EVOs. This oil is a single viscosity, 90 weight, and the part number is #377610. If you can’t find this oil you must find a gear oil that meets the GL-5 Hypoid specification. Again this oil must ONLY meet GL-5 preferably 90 weight. Do not use a gear oil that claims to be GL-3, 4 & 5. These one size fits all type oils are not recommended anymore than a one heat range fits all spark plug.
Also, multi viscosity index modifiers and dyes both reduce the film strength of the oil; they take up valuable parking spaces on the molecular level and that’s what the transfer case and rear end both need more of, film strength. There are several brands of oil on the market and you can use any of them as long as it meets Mitsubishi's requirements.
Change the transfer case oil everytime you change the engine oil and you'll have a happy T-case.
Jon@teamrip.com
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