Hi, i have a 2004 wrx and i wanted to change my own tranny fluid.. i wanted to ask where is the location of the tranny fluid reservoir and the drain plug .. i dont have the manual anymore -_- will anyone help me step by step with instructions? that would be great. Thanks!

 

check your PM.

 

drain plug is on the bottom of tranny bronze looking bolt. after you drain pull dip stick out by the firewall and pour new fluid in. dont use redline i ruined my tranny like that.

 

How did u ruin ur Tranny using Redling MT Fluid?

Isnt there a buy sumwhere where they offer full Redline Fluids for our cars?

 

Your 04 may have a T70 Torx head drain plug instead of a conventional hex head, so if this is the case and you're going to be changing the fluid yourself you'll need to find a T70 socket. They are available but can be a bit tricky to find.
IIRC the change to the T70 plug was made during the 04 model year, so you should get underneath and have a look to see which one you have.

 

you put in fluid, where the dipstick goes? really?

 

yezzir

 

I had to buy the t70 torx socket online. No one had it in town. I just used regular valvoline gear oil in mine. Supposidly this is the stock fluid. Certan sythetics tend to be a bit thin and cause more grinds. If it works dont fix it.

 

it grinds alot usually 3rd gear.. i need a new clutch soon, sighh

 

what kind of gear oil would everyone prefer? i have to get the 75w-90 right?

 

Grinding does not mean you need a new clutch, slipping does.
You either have incomplete clutch disengagement due to hydraulic issues, or internal trans problems. New fluid isn't a fix and is no substitute for a proper mechanical repair.
The correct fluid to use is a 75W90 GL-5 as specified in your manual, if you can't find 75 then 80W90 is also acceptable.

 

wait wait Redlines ruins our tranny???? i dont get it...

 

dont use mobil1 synthetic either(+ its expensive), now i grind in 4th only above 3Krpm shift

i drained it after a week of use and used valvonline 80-90 (didnt have 75) but it still grinds in 4th but around 4k rpm now.... i can go higher but only for the first 5 mins of driving, but when the fluid warms up it grinds at a lower rpm

im going to try one more time with 75 90 and some penzoil syncromesh stuff. this is the last time im going to try this.