July 25, 200817 yr ok so i got from subaru that you can use pretty much any kind of lsd additive and it should work. But how much are you supposed to use? i know you are supposed add some more if the plates chatter, but what's a good starting point.
July 25, 200817 yr hmmm, this is a good question. the stuff ive seen usually just says to add the contents of the tube it comes in to the diff when you refill it. but im not sure on a subaru rear diff.
July 25, 200817 yr I would assume its just like any other diff. Fill it to the bottom of the filler hole.
July 25, 200817 yr Author I would assume its just like any other diff. Fill it to the bottom of the filler hole. no i'm talking about the additive not the gear oil with additive added. you get little bottles of friction modifier (lsd fluid) and add in with normal oil.
July 25, 200817 yr The additive i bought said to use a full tube and top off with gear oil. So I did.
July 25, 200817 yr The additive i bought said to use a full tube and top off with gear oil. So I did. same here, only it was for big american trucks, or at least that's what they listed on the bottle... I figured my diff was a lot smaller and used half the bottle... I suppose the best way to find out is to call subaru and find out how many ounces are in their bottle of friction modifier... --Spiffy
July 25, 200817 yr no i'm talking about the additive not the gear oil with additive added. you get little bottles of friction modifier (lsd fluid) and add in with normal oil. Ahhh, ok. Never used it, I dont have a clue, sorry :-\
July 25, 200817 yr Author well after i got off the phone with lithia they said they don't have the additive any more and the only way was to get that kind of fluid was to get the 5 gallon special subaru LSD gear oil. um yeah no thanks. called a couple more subaru places and found one that said they get thier stuff from GM and the bottle is 4oz. so now we know and knowings half the battle. GI JOE!!!!
July 25, 200817 yr Author called chevy they have the 4oz bottle for $9.95 looks like i'm off to chevy. thanks guys
July 25, 200817 yr If I remember correctly, I just dumped the whole 4 oz. tube in the diff then topped it off with gear oil.
July 25, 200817 yr Author If I remember correctly, I just dumped the whole 4 oz. tube in the diff then topped it off with gear oil. and that's how i'm going to do it, i just was looking for that magical "4oz" amount.
July 26, 200817 yr FWIW, I filled my 200k mile RX diff with AMSOIL 75W-90 gear oil only and have had no issues or chatter and perfect operation with over 40k miles and plenty of off-roading, launches, and other abuse.
July 26, 200817 yr Author FWIW, I filled my 200k mile RX diff with AMSOIL 75W-90 gear oil only and have had no issues or chatter and perfect operation with over 40k miles and plenty of off-roading, launches, and other abuse. i have heard good things about amsoil, it seems the people that use it really like it but i have never had a chance to use it yet. i like redline, and really because it got rid of so many grinds in multiple trannys. until redline lets me down for what ever reason, i can't see me going through different brands just to see, not unless it is way cheaper.
September 16, 200817 yr Author Which grades are you using to resurect worn trannys? the red line 75/90 NS. make sure you get the NS because it doesn't have any friction modifiers added to it. If you read about it on their website it makes kind of makes sense about the lack of friction modifiers helping the synchros come to speed faster. i figured there was one way of calling their BS was to try it. and i must say in every tranny i have used it in, shifting was much better and took away a second gear grind on multiple trannys.
September 17, 200817 yr Ive seen cans around my dealer before that are made for 1 drain and fill of the rear diff.
September 17, 200817 yr FWIW, I filled my 200k mile RX diff with AMSOIL 75W-90 gear oil only and have had no issues or chatter and perfect operation with over 40k miles and plenty of off-roading, launches, and other abuse.is it possible your clutches are warn and that's why the fluid didn't make much difference? i've heard they do wear and have always wondered how much, how to check and how to rebuild. i have heard of people rebuilding them...or adding shims or whatever to bring the grip back up to spec's.
September 18, 200817 yr is it possible your clutches are warn and that's why the fluid didn't make much difference? i've heard they do wear and have always wondered how much, how to check and how to rebuild. i have heard of people rebuilding them...or adding shims or whatever to bring the grip back up to spec's. All I know for sure is that it still works.
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