The manual trans and transaxle gear lube.

 

shep says use stock

 

Then I suppose that is what you should run....

I will keep the hundreds of customers I have, running AMSOIL MTG, happy. It is a far better fluid and improves all aspects of the transmission.


Doc

 

cause sheps wants you to go back to him for rebuild. I have two sheps tranny and use per sheps recommendation. both are broken.

 

There is nothing marvelous about DiaQueen... It just goes out for bid every few years like all the other OEM's.


Doc

 

oil doc, so i have an evo 9 mr so i have teh 6sp and wanted to swap trany fluids what do you have and for how much?

 

This thread is really old, but still want to share my lastest findings about optimal fluid combo, readily available at your neighborhood parts store:

Transmission Oil: GM Penzoil Syncromesh (shifts are freakin' awesome now - good for internal brass and nice alternative to DiaQueen)

Transfer Case Oil: Mobil1 Synthetic 75-90W LS

Rear Differential Oil: Mobil1 Synthetic 75-90W LS - its already got the LSD additive in it

 

Transmission: Castrol syntorq 75w-85 full synthetic
Transfer case: amsoil severe gear lube 75w-90
Rear differential: amsoil sever gear lube 75w90

This is by far better than the redline i used to run. It would be hard to get into gear in 1st/reverse and notchy in 2nd with redline. This combo cured everything. Shifts extremely smooth now. I got the tranny fluid from Erik at Mil_spec and amsoil from Oil Doc.

if you are running the mr 6speed tranny please try this combo. You will not be disappointed.

 

I searched the Castrol USA website and downloaded the data sheet for SynTec Gear lube.

If I looked at the same product that you are using, I would get it out pretty quick. All I could find was a GL-5 Rating and your Transmission Requires a GL-4. GL-5 Does Not automatically supercede a GL-4 but does supercede GL-1 thru GL-3.

A GL-4 is used specifically where there are Brass/Bronze or Copper parts that come in contact with the fluid. Bushings, Synchro's

Please check this for your own good and the good of your wallet later on down the road.

Doc

 

I have shockproof heavy duty in my tranny right now but would like to drain it out and replace with a better fluid. What would you recommend using to flush it out as it is some pretty thick stuff?

-E

 

Before I made a recommendation, I called my Tech Department and talked to the Senior Tech.

He said the same thing I was thinking. The shockproof, due to being a petroleum oil forms a wax buildup in parts of the transmission. We agree that the only way to suitably flush the tranny would be to run the AMSOIL MTG which has Esters. Esters are a great cleaning agent.

Do a short cycle on the change interval with the MTG... say 5000 miles and then change fluid again with MTG.


Doc

 

I'm using castrol syntorq LT 75w85 gl4 fluid not syntec gear lube. Here is the link that mil_spec advertises it on.
https://www.evolutionm.net/forums/sh...d.php?t=350220

 

Please PM me price for 2 changes of this stuff for the Evo. I want to get this pink Pepto Bismol out of my tranny ASAP.

-E

 

i'm replacing my clutch soon and will me using AMSOIL in the tranny, transfer case and rear diff

 

I have been posting back and forth with Erik in another thread. He is unsure of the GL-4 rating at this second and is checking into it. That is the big concern. I am sure the fluid will work relatively well even though I believe it is a Hydro-Cracked product.

Doc