Hey I’m really new to mitsu world. I went from Honda to an evo 8. My thing is I needed tranny fluid and tcase fluid. My parts dept order me Castro fluid from bennet 75w-90 full synthetic for both tranny and tcase. I don't drive the car allot and the cars not going in to boost yet. It’s missing piping. But I’ve been driving the car around and now I hear a crazy whining noise. I was told it’s the tcase. Now I was also told that the fluid that I put in was completely wrong for the tcase if I was to flush it out with OEM diaqueen do you think the whine will go away. I put less than 40 miles on the car the car never whined before

oh yea i tried ordering mitsu fluid at first but the parts dept was acting like asses

 

Only one way to find out. Some have had the noise disappear once they put in fresh diaqueen so there's still hope. You put the same castrol fluid in your gearbox too or just the tcase and rear diff?

 

rear diff i never had to to change. just tranny and tcase got the same fluid

 

you need to get that gear oil out of the TCase ASAP!!!!! and pray that it's not too late!!!!!

 

yea tomorrow i'm going to put it on the lift and let it drain for a couple of hours, hopefully nothing got messed up. i plan on flushing it out with the diaqueen. fill it drive it and drain it and fill it again

 

damn man hope your tcase isn't f***ed.

 

Just drained out the tcase fluid is dark grey. I was feeling the fluid didn't feel rough like metal flakes, but it looks like fine metal so fine I can't feel it. Oh well hot some diaqueen coming. If it stops the whine great if not sheptrans here I come