Need a real answer on transmision oil
Thread Starter
Newbie
Joined: Aug 2003
Posts: 56
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From: La Mesa CA
So basically, the Syncromesh is not GL-4 rated, which is what our car calls for and that is why I use and recommend MT-90.
That's what i'm thinking, but what about the MTL? It's about the same. MTL SAE 70W80 GL-4
BG synchroshift is great for the transmission. My tranny noise is gone after I started using it.
I've tried several others and this stuff by far has the smoothest shifting and the least noise of all.
Thread Starter
Newbie
Joined: Aug 2003
Posts: 56
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From: La Mesa CA
wrong... I had some RedLine 75w-90 put in the tranny after a clutch job. Shifted like crap. Switched to RedLine MT-90 and it shifts like butter.
The MT-90 has friction modifiers for the syncros, while the other stuff does not.
The MT-90 has friction modifiers for the syncros, while the other stuff does not.
Last edited by two2thehead; Dec 20, 2004 at 06:09 PM.
Originally Posted by two2thehead
But the Redline 75W90 is a API GL-5 and the MT-90 is API GL-4 so that might have been the problem since Mitsubishi recommends only GL-4 in the tranny.
Well, I've had the MT-90 in the MR 6sp for about a week now, and I'm not really happy with it. While it did help things when the tranny is cold, it did not get me as smooth a shift as I had expected (based on my previous experience with MT-90 on the Celica). So, I'd recommend trying the synchromesh first.
People can bench race the fluids with "specs" all they want, but you owe it to yourself to try the Syncromesh/Syncroshift... I don't have any of the "problems" with the tranny most are complaining about.
Evolved Member
Joined: Jun 2003
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From: Nothern CA
Zeus...Bench race... wow.. "engineer speak " as us "test monkeys" used to call it.
There are two main condsiderations here. Corrosion or oxidation and friction. The first condition occurs where you have two dissimilar metals separated by a fluid which then sets up electrolosis. The friction issue has to do with viscosity characteristics linked to film strength and molecule length. The Syncromesh is a hybrid mixture or magic juice concocted to ease specific deficiencies in particular applications. The DSM cars are mentioned along with the Chysler spec. and part number. I have had experience with factory service reps recommending such under the table kinds of "band aids" before and they usually work well. Any service tech who ventures out on their own will come under heavy flack when the factory dude comes by to investigate an onging service problem. Bottom line.. Thanks for the heads up Zeus... you da Man
There are two main condsiderations here. Corrosion or oxidation and friction. The first condition occurs where you have two dissimilar metals separated by a fluid which then sets up electrolosis. The friction issue has to do with viscosity characteristics linked to film strength and molecule length. The Syncromesh is a hybrid mixture or magic juice concocted to ease specific deficiencies in particular applications. The DSM cars are mentioned along with the Chysler spec. and part number. I have had experience with factory service reps recommending such under the table kinds of "band aids" before and they usually work well. Any service tech who ventures out on their own will come under heavy flack when the factory dude comes by to investigate an onging service problem. Bottom line.. Thanks for the heads up Zeus... you da Man
wait before i go out to try MT-90 or BG synchroshift... are there any additives in either of those 2 that are bad for our tranny? I think earlier in this thread, someone said that Redline MT-90 is bad for our brass...
You can use MT-90 or BG without any additives in the transmission. I have ran them both, and both performed very well. To be honest you cannot go wrong with either oil, no matter what any fanboi's say 
