Waz996

iTrader: (1)

Please can someone tell me what brand/type/spec of oil i should use in the -

1) Gear Oil
2) AWD transmission
3) Back differential cup that's in the boot
4) Engine Oil

Any other location/type of oil to change!

I live in Dubai, weather ranges from 20deg (rarely) to 45degC (mostly).. and that's super hot in the summer (desert area here)

Thanks

Wael

GEARS

iTrader: (5)

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