fluid for tranny long life
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You really can't go wrong with either Redline or R.P. I have Redline in the tranny and Purple in the diff. The shockproof stuff is trick I was playing with it before I poured it in it sticks to metal like it is magnetic. Comparing it to Mobil 1 it was shockproof all the way. Get the ultra light weight shockproof it is thinner than the normal and makes shifting butter smooth.
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Joined: Mar 2003
Posts: 2,023
From: Phoenix, AZ
Car Info: Subaru Impreza WRX 2002
I just got back from the dealer, having a "shimmy" in the rear end checked out (loose bolt on endlink, fixed). I asked him about changing the transmission fluid, as I am over 20k miles (the Subaru service manual reccommends a change at 15k for hard use, 30k for normal).
He said that he would wait until 30k, and in fact changing your transmission fluids at any interval under 30k is a bad idea, because all transmission fluids have a "detergent" base that can actually erode your gears and synchros. This detergent effect goes away after the first 5,000 miles or so after a change, but if you change often you might be changing it before the detergent effect goes away -- greatly increasing the wear on the transmission.
I find this information really interesting, considering that he COULD have charged me $299 to change the transmission fluid (labor + fluid + tax) and instead passed on making the money! He had me right there, ready to have it changed, and he turned me down -- obviously this show of honesty impressed me, but the information he gave me is some food for thought as well. Anyone care to debate it?
He said that he would wait until 30k, and in fact changing your transmission fluids at any interval under 30k is a bad idea, because all transmission fluids have a "detergent" base that can actually erode your gears and synchros. This detergent effect goes away after the first 5,000 miles or so after a change, but if you change often you might be changing it before the detergent effect goes away -- greatly increasing the wear on the transmission.
I find this information really interesting, considering that he COULD have charged me $299 to change the transmission fluid (labor + fluid + tax) and instead passed on making the money! He had me right there, ready to have it changed, and he turned me down -- obviously this show of honesty impressed me, but the information he gave me is some food for thought as well. Anyone care to debate it?
imprezer, what do you think of the redline 75w90 synthetic gear oil for the rear diff?
Im gonna put that in the diff and go with the GM synchromesh / mix Valvoline 75w90 full synthetic for the tranny
Im gonna put that in the diff and go with the GM synchromesh / mix Valvoline 75w90 full synthetic for the tranny
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