BG synchroshift is great for the transmission. My tranny noise is gone after I started using it.

 

Your service recommendation is written assuming that you will drive the car normally, granny shifting and no hard launches. Many of the tuning shops will recommend some form of Synthetic Syncro Shift oil such as BG or Redline. I would take thier advice over some wrench monkey at the Mitsu service center.

 

oh reaallly... i've been mis-informed. sorry for posting that about Redline guys.

 

Good info...thanks, guys!

 

tranny=mt-90
Everything else Diaqueen

 

BG SyncroShift in the tranmission

DiaQueen LSD Gear Oil in the transfer case and rear diff (bought from Mitsubishi)

I looked into this a few months back... this is the answer.

 

Except that people have had big problems with Syncroshift and its variants. None reported with MT-90. BG, Pennzoil, etc is not the answer.

 

What kind of problems have people had w/ BG/pennzoil stuff? I know BG is SAE 75, which is too thin for our trannies.

 

Grinding and stuff. I'm too lazy this perfect weather Sunday to pull some links for you. Sorry!!

 

Ive been using gm syncromesh and it works awesome in the tranny, much better than the redline i had in previously (mt-90). Also using diaqueen lsd gear oil in the tc and the rear diff.

 

I just put MT-90 in the (MR) transmission, and so far it seems to work fine. Less grind when cold than the stock stuff. I have not used synchromesh so I can't offer a comparison between those two.

 

can someone post up the price difference between the Redline MT-90 and the GM Synchromesh. Also are there different weights of the GM Synchromesh or do I just go to a GM dealer and ask for "Synchromesh"?

 

Do a search on "Syncroshift" and "Syncromesh"... you want the non-synthetic. On one of the threads, all of the above are discussed. The actual GM part number is listed for the Syncromesh. However, it was found that Pennzoil manufactures it, and the Pennzoil stuff you get at Auto Zone (same part number listed on the bottle) is in fact the exact same product. I believe it is about $4.99 a quart there. It was probably the best thing I could have done for the tranny.

 

Syncromesh
http://www.stealth316.com/2-pennzoil-synchromesh.htm


MT-90
Popular in Nissan, Toyota and Mazda manual transmissions and transaxles as well as other selected applications, this is a 75W90 GL-4 Gear Oil that’s slightly heavier than MTL. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting.


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.

 

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.