Hey, I just got my order of Syncro Shift in from lancershop and it says its for front wheel drive manual transmissions. Now odds are this is 100% correct I just wanted to make sure before I throw this in tonite. Also can anyone recommend the best fluid to go with for the rear diff and the transfer case. I know I need Transfer case = GL5 SAE90 (90 Only)
Rear Diff = GL5 SAE 90 (or 85W-90)

but if anyone can recommend the best brand I would appreciate, however it looks like Mitsu Part #377610 Diaqueen LSD Gear Oil seems to be what everyone recommends. However I have heard good things about Redline Shockproof as well.

Thanks
Staton

 

I put BG in my car (03 evo) and noticed a big difference. It shifts like cutting butter now and has less tranny noise. As for the rear diff and TC I heard good things about Redline shockproof for TC and 75-90 for rear diff. If you race alot go with the heavy shockproof, otherwise use the light version.

 

dont worry that it says front wheel drive on the bottle...its all good

 

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 this 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.

 

interesting.....

evoisdream

 

Just curious since my Mitsu Service Dept is a joke. Is there any place on the net I can out source the Diaqueen online? And if not which redline do you recommend for the transfercase and reardiff? Shockproof *ultra light, light, or heavy*?

Thanks so much!

Staton

 

does anybody? here used syncroshift on six speed pls let me know bout the result

 

I used BG Syncroshift on my MR with great results.

 

I've heard the redline shockproof is good for racing for 1 or 2 events, but it breaks down quickly.

For daily driving I've been told to use the Mitsubishi diaqueen. Thousand Oaks Mitsubishi uses BG Syncroshift in all of their transmissions and the Diaqueen GL5 in the transfer case.

 

The transmissions seem capable of running a multitude of different oils without much of a problem.

However, I'd stick to Mitsubishi's advice about the transfer case oil unless you promise not to ***** if and when your T-case starts howling.

Just check in the little owners manual, section 9 if I'm not mistaken.