5EAT Ask your Questions!?!

My understanding is that Subaru Extra S gear oil is to make the Subaru MT box shift like butter. However, when it comes to the front diff, there's no need for a fancy gear oil. It's just a rack and pinion and some spyder gears up front. Unless you have my diff, which is a mechanical TBD, and even that still doesn't need anything special. Name brand synthetic 75W-90, or whatever your climate dictates.

 

http://mkiv.supras.org.nz/images/articles/torsen3.gif

Alright- been having some issues with 2-3 shift slipping. I originally noticed it a couple weeks ago (completely stock, no tune), had it in intelligent mode & manual, merging onto the highway WOT (i didnt upshift manually). Slipped pretty bad and then slammed into 3rd. Figured it was because i was in and it shifts slower. Tried to recreate it, and didnt slip in S# (dont think i tried S). Since then i got an accessport and running the stage 1 93 map. Similar thing happened the other day merging on the highway- i was in manual- S this time, didnt upshift, and it slipped bad. Recreated the slip in S (both manual and auto mode). did not slip in S#. So my question- are my clutch packs wearing out or is the shift too slow? or a little of both?

What size are the rubber transmission lines that are towards the front of the car under the battery tray?

 

I am trying to order a t fitting so that I can install a temp sensor that is 1/8" npt.

 

Prosport sells an 8mm barb fitting tee contraption but that equals out to be just a bit less than 3/4" according to a google search.

 

When I sent the diagram of the prosport fittings out for a quote, the guy got back to me with "are you sure it is 8mm? It is very similar to a 5/16"."

 

Now I am confused, so I am wondering what size the rubber hose is so I can get the proper barb fitting.

 

Thanks.

MIGHT sound dumb

 

Use Subaru extra-s fluid. I'm pretty sure you the 5mt gearbox shares the fluid with the front diff. You can order the extra-s from Fred beans parts for a reasonable amount.

 

Do not use ATF (AUTOMATIC Transmission Fluid), lol

 

so is there a separate process to change the fluid for the diff? this is my first awd car and NO ONE ELSE in my family has had one so it's all new to me.

Yep.. Dipstick for the diff is on the passenger side of the tranny. I believe the plug is closest to the front.

Alright- been having some issues with 2-3 shift slipping. I originally noticed it a couple weeks ago (completely stock, no tune), had it in intelligent mode & manual, merging onto the highway WOT (i didnt upshift manually). Slipped pretty bad and then slammed into 3rd. Figured it was because i was in and it shifts slower. Tried to recreate it, and didnt slip in S# (dont think i tried S). Since then i got an accessport and running the stage 1 93 map. Similar thing happened the other day merging on the highway- i was in manual- S this time, didnt upshift, and it slipped bad. Recreated the slip in S (both manual and auto mode). did not slip in S#. So my question- are my clutch packs wearing out or is the shift too slow? or a little of both?

 

How many miles? What is the ATF service history?

 

What size are the rubber transmission lines that are towards the front of the car under the battery tray?

 

I am trying to order a t fitting so that I can install a temp sensor that is 1/8" npt.

 

Prosport sells an 8mm barb fitting tee contraption but that equals out to be just a bit less than 3/4" according to a google search.

 

When I sent the diagram of the prosport fittings out for a quote, the guy got back to me with "are you sure it is 8mm? It is very similar to a 5/16"."

 

Now I am confused, so I am wondering what size the rubber hose is so I can get the proper barb fitting.

 

Thanks.

 

I forgot which, the inside diameter of the hoses are either 5/16" or 3/8". All google search results say 3/8", so there you go http://subaru.rockhopjohn.com/Transcool.pdf

 

Take a look at this: http://www.jegs.com/i/Mr.+Gasket/720/2975/10002/-1

Edited November 7, 2012 by ClimberD@HexMods

How many miles? What is the ATF service history?

 

~51k, no ATF service history to my knowledge. I guess I should start looking into that.

~51k, no ATF service history to my knowledge. I guess I should start looking into that.

 

All of that ATF has to go. Replace it all with either Amsoil ATF, Mobil 1 Full Synthetic ATF, or Subaru ATF HP for 5eat. Confirm the fluid level after a drive, then check back in. And try to find a low pressure flush machine service that pumps the fluid in the normal direction of flow, and if you're lucky, lets the trans pump out the old fluid on its own power. Not cheap, but you don't have a choice. Also cheaper than any alternative.

Any updates on the 08 vb? Any progress lately?

Fluid level looks good, but nice and dark. my buddy works at a shop who has a pump, so hopefully i can get in there soon and get it all worked out. thanks for the advice climberD. Didnt realize i should check/change my ATF that often.

How's the FAQ for this coming along? I'd love to read a PDF of this condensed into one document.

 

inb4toolazytoread7pages

Can the the line pressure be increased using a programmer to create firmer/quicker shifts without damaging the 5EAT in a 2012 3.6R?

08 still slow going, still working in that direction.

Yes, once day, written up in easy-to-digest format.

Can the the line pressure be increased using a programmer to create firmer/quicker shifts without damaging the 5EAT in a 2012 3.6R?

 

The answer to this is surprisingly complicated. There are some clever experimental tricks that can be performed to the ECU tune to increase line pressure (somewhat) as a side effect of changing other things. This is well beyond the scope of this thread, and will take a lot of digging and experimenting to get a good answer.

08 still slow going, still working in that direction.

Yes, once day, written up in easy-to-digest format.

 

If you need any help with formatting or aggregating data let me know if I can help.

 

Us 5EAT'ers are in this together.

I'm a lone wolf

Forget you guys!

Crossposting, enough of you have asked about doing a DIY 5EAT ATF Flush, that I slapped together this walkthrough. If it doesn't make sense to you after reading my WHOLE post and going through the links, then don't do it. http://legacygt.com/forums/showthread.php/diy-5eat-atf-flush-197248.html?p=4180890#post4180890

ok, since i only drove my car for a few hours before the engine blew, what is the difference between the left side and right side shift buttons on the steering wheel?

 

can i just shift with the shifter, or do i have to use the buttons?

no difference, buttons are the same. You can shift with the steering wheel or the shifter.

 

then why are they on both sides of the steering wheel?

Because some people are left handed...?

 

Also, because racecar.

 

 

haha i thought was one more sport and one was more casual driver....

See, what i like to do is press + on one side and - on the other side at the same time and see which wins

For extra thrills, do this near redline

haha ill make sure to keep that in mind....