blackfang

Sure thing. I will update when I get a better vid.

Here is mine, not the greatest. I may have to make a new one.

2007 Legacy 2.5i SPT catback

http://svt4u2try.com/images/Legacy/DSCF5538.AVI

I had Hawk HPS on my Cobra and loved them.

http://www.drive.subaru.com/Win09/Win09_ItsWhatMakes.htm

 

That said, thanks for introducing the term "transfer clutch" to my vocabulary.

I am pretty sure I know what is part of a Subaru's all wheel drive. Sometimes literature that is being published for the public that describes things tend to use basic terms so that the average person "gets it". They do not go that far in depth using the correct technical terminology. The "transfer case" also called the extension case and is what is in the back of the transmission. Infact the Service manual doesn't call it a transfer case.

 

Inside that transfer case(we will call it that for your sake of argument) is where the transfer duty solenoid, transfer clutches and transfer driven bearings are. The transfer clutches are responsible for controlling the correct ratio with the help of the duty solenoid, the valve and fluid.

 

The AWD transfer system( we will use the 4EAT as an example) uses a hydraulic multi plate clutch system(IIRC there are 5 of them) that is controlled by the TCM through a control valve. Hope this clears things up for you Now do we still want to debate what is inside the transmission or keep this on topic so it helps other enthusiasts so they correctly address replacing tires and how it relates to the AWD

I'm pretty sure you meant "transfer cases."

I am pretty sure I meant transfer clutches;). Subaru's are not 4x4's and do not have a transfer case. They do have transfer clutch's/center differential that are in the transmission that control the transfer of power to the f/r wheels.

I had a loud vibration yesterday in relation to rpms and sounded like it was coming from the passenger front floorboard. I got home and popped the hood and saw all the ice wedged around the exhaust and cat.

That is correct. I did the same on my way to work Saturday and got stuck as i arrived at work(nothing was plowed), but had just an ABS and ERR SS in the cluster. I just went inside and cleared everything with the SSM we had.

 

I had a customer come in today for the same thing. We have seen some vibrations and busted wipers today because people fail to realize that stuff builds up under the front end and they think they can use frozen wipers to clear off all the snow:lol:

Here is a link for Subaru's maintenance guide.

https://www.subaru.com/my-subaru/maintenance-schedule2009.html

 

On the right hand side of the page are links for other years that pertain to your vehicles.

Bump being I see some new threads about this, but it is not stickied here(in the 2.5i FAQ)

I would imagine that if they make one for a LGT, then the Magnaflow should fit diameter wise and connect fine.

Sure thing. IIRC, only the 2.5i with the 4EAT has the fuse where you can do that. If you get a flat in the front, Subaru recommends putting the spare on the back wheel and use the back wheel for the front until you can get it fixed. The 3.0 and turbo does not. All manuals do not either. I will double check, but could be wrong.

 

I hate fix a flat. When I was a tire changer, we used to get that crap all over us and it was a pita to clean/remove.

I would imagine they do. Every dealership I have worked at does.

 

I know we also can do alignments on lowered vehicles(to an extent, but factory specs only). I also have 2 other shops that can do customer alignments on lower cars that I send some customers to.

Since i didn't see any of this in here, I figured I would also put the info out as it can be helpful. I also wrote this for the Wheels/tire subsection.

 

TIRES

There seems to be quite a few threads dealing with damaged or blown tires to where they need to be replaced and how many do they need. I am going to expand on this.

 

My experience on this issue is being in the Automotive industry for 6 years and as a Subaru Service advisor. I have also worked in the tire markets as a certified Michelin/BFG Salesman.

Also, the info I am giving you is my view and facts on this subject from first hand knowledge and the failures of the AWD system due to this. If you disagree with it, then so be it, it is your car and your money. I have seen plenty of failures and people end up forking over to me their money because they made the mistake.

 

Whenever you have to replace any tire on a Subaru, you must measure the circumference of the new tire when it is mounted. Then you measure the old tires. If there is more than a 1/4 inch of difference in the measurements, you should replace the other tires.

 

Folks, do NOT let the 1/32nds or 3/32nds rule fool you. That is not the correct method and it will cost you transfer clutches. Normally the 1/4inch threshold is around 15,000 miles, but I have seen a forester make it to 19,000 and still be within 1/4 inch.

 

If you do not do this, you are increasing the chances of damaging the transfer clutches/center diff or prematurely wearing them out on your awd. Automatics tend to be more prone to this than manuals. It isn't really a matter of if it happens, but more of a when.

 

 

Hope this clears up any confusion on whether you need all new tires or not.

 

Also proper tire rotation's and frequent alignments(I recommend once a year) help prevent irregular wear on the tires. Lack of rotations can also cause awd problems as well.

It should say inspect them and that's all you do.

Otherwise...

Change oil

Rotate tires

Inspect and adjust parking brake

Well first, when you pull the handle, fluid will not come out anyways. Have you checked to make sure there are no clogged lines and that the harness is plugged in on the washer bottle?

np, glad it's been useful

 

i'm a little confused about the clutch situation now, my previous understanding was that the 5MT transmissions between the LGT and the 2.5i were not compatible because one was a push type design and the other was a pull (i don't remember which is which at the moment) but now apparenlty tha'ts not true and both are the pull type trannies (according whitetiger inanother thread ?) and that LGT clutches can be fitted onto the 2.5i 5MT ??? (seanrose is about to do a turbo swap and fit his 5MT with a LGT clutch) blackfang do you know if that's possible at all or if you'd have more info on that?

 

I can try and find out for you. IIRC, they can be swapped.

I'm a little confused.. reason being my 05 lgt.. it is a 5eat and the split ratio front/rear is different..

 

So my question is.. lets say the back two tires are the same diameter.. and the front two are the same diameter.. but compared from front to back they are different.

 

So how would running lets say a new set on the front and a used set on the back affect anything? I could see if you ran 1 new and 1 used on each side of the rear and wear the rear diff over time..

 

The same applies and makes no difference, and here is why.

 

Your AWD system does have a VTD set up. It will split up the ratio 45/55. However, it still operates the same manner as a continuous AWD, maybe a little better though. So if a set of tires are larger in circumference than another say the rear, the system sees they are spinning faster than the other set. It will do it's job and transfer the torque to the wheels that are not spinning as fast. This will cause damage to the clutches because the vehicle is not really stuck at all and burns the clutches/solenoids out. The AWD system just thinks it is.

 

There is a thread on here that describes all the types of AWD that comes with our cars.

 

Edit- Found it

http://www.legacygt.com/forums/showthread.php?t=48112

Some nice info in here. Great work/job!

Check your math. A 1/32" (0.03125") difference in tread depth is equivalent to a 1/16" (0.0625") difference in diameter and a 0.20" difference in circumference, well within the 1/4" (0.25") threshold you cite.

 

On the other hand, 3/32" (0.09375") difference in tread depth is equivalent to a 3/16" (0.1875") difference in diameter and a 0.6" difference in circumference, well beyond the 1/4" threshold.

 

My math has nothing to do with it. Granted you might be safe with just 1/32nds, however, that is not the most accurate way of measuring. How do we know the tire is exactly 1/32nds all the way around in tread on all the tires and that all the tires circumference is the same. You can't, so it is safer to measure with the tape measure to get an accurate measurement among all the tires. I can assure you, if you just measure the tread depth, you will be damaging the AWD at some point.

 

When going by tread depth difference one makes assumption that tires have the same circumference to start with.

It may or may not be the truth.

 

It is safer to take a tape and measure circumference.

 

Krzys

 

Exactly.

You need to check the measurements of all the tires. If the others as in your case the other 3 are more than 1/4" difference, you should replace the other 3 as well.

hmmm... if I replace my 17" to 18" rims, can I still use the spare tire on my LGT? I just want to make sure. I thinks its a NO?

The spare is just used to get you to a place to fix the tire/replace. If that is all you are going to use it for you will be ok. Now if it is going to be on there for more than a few days, that is a no no anyways.

 

When you measure the circumference, do you have the car in the air ?

 

I would be interested to know how much a couple of psi difference between tyres makes on the circumference.

 

You need it off the ground enough to get a tape measure around them for an accurate reading. Once the new tires are mounted on the wheel and inflated, you measure the circumference of it. Then measure all the rest.

Possibly so, but until now there wasn't a thread addressing that, so it might reduce some of them. Definitely worth a shot.

Hopefully this will help some out.

Mods, if you want to make this a sticky, feel free. If not, that is ok.

 

There seems to be quite a few threads dealing with damaged or blown tires to where they need to be replaced and how many do they need. I am going to expand on this.

 

My experience on this issue is being in the Automotive industry for 6 years and as a Subaru Service advisor. I have also worked in the tire markets as a certified Michelin/BFG Salesman.

Also, the info I am giving you is my view and facts on this subject from first hand knowledge and the failures of the AWD system due to this. If you disagree with it, then so be it, it is your car and your money. I have seen plenty of failures and people end up forking over to me their money because they made the mistake.

 

Whenever you have to replace any tire on a Subaru, you must measure the circumference of the new tire when it is mounted. Then you measure the old tires. If there is more than a 1/4 inch of difference in the measurements, you should replace the other tires.

 

Folks, do NOT let the 1/32nds or 3/32nds rule fool you. That is not the correct method and it will cost you transfer clutches. Normally the 1/4inch threshold is around 15,000 miles, but I have seen a forester make it to 19,000 and still be within 1/4 inch.

 

If you do not do this, you are increasing the chances of damaging the transfer clutches/center diff or prematurely wearing them out on your awd. Automatics tend to be more prone to this than manuals. It isn't really a matter of if it happens, but more of a when.

 

 

Hope this clears up any confusion on whether you need all new tires or not.

 

Also proper tire rotation's and frequent alignments(I recommend once a year) help prevent irregular wear on the tires. Lack of rotations can also cause awd problems as well.

Also a reminder for those with 2009 Legacy and LGT/B, you have the Subaru Super Coolant(blue), the first coolant exchange is 11yr/137500. After that exchange the coolant every 6yr/75,000.

 

If you use this in your pre-09 vehicle, the coolant exchange is done every 30 months/30,000. This is due to the fact your coolant system still has a mixture/residue of the old green coolant in it. However, if the place that services your car uses a Wynns Power Flush III coolant flush machine, you can exchange it every 6yr/75,000 miles being that machine is approved by SOA and removes all old coolant/residue(per TSB 01-166-08).

 

01-166-08

 

09-50-07

 

 

**Disclaimer- I am merely passing this info along. If you disagree, or want to debate the issue, I don't care. Argue with yourself. It is your car and your responsibility.**